From b0dc1b2ef66334394613c6e92a4c5b0ebb8e0faf Mon Sep 17 00:00:00 2001
From: "gcf-owl-bot[bot]" <78513119+gcf-owl-bot[bot]@users.noreply.github.com>
Date: Tue, 9 Jul 2024 15:49:25 -0400
Subject: [PATCH] feat: [discoveryengine] add Chunk resource in the search
 response (#5526)
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* feat: add Chunk resource in the search response
feat: add NO_RELEVANT_CONTENT to Answer API
feat: support AlloyDB Connector
docs: keep the API doc up-to-date with recent changes

PiperOrigin-RevId: 649156977

Source-Link: https://github.com/googleapis/googleapis/commit/ff081c977ecd64c60e31d365a05f2cb17d0b8b0b

Source-Link: https://github.com/googleapis/googleapis-gen/commit/bbee86257e17d550e7956d42a95d9c1fe5021c88
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* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

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Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
Co-authored-by: sofisl <55454395+sofisl@users.noreply.github.com>
---
 .../google-cloud-discoveryengine/README.md    |     2 +
 .../cloud/discoveryengine/v1/answer.proto     |    13 +
 .../cloud/discoveryengine/v1/chunk.proto      |   119 +
 .../cloud/discoveryengine/v1/common.proto     |     5 -
 .../cloud/discoveryengine/v1/completion.proto |    31 +
 .../v1/completion_service.proto               |    38 +
 .../v1/conversational_search_service.proto    |    35 +
 .../cloud/discoveryengine/v1/document.proto   |     2 +-
 .../v1/document_processing_config.proto       |    39 +-
 .../discoveryengine/v1/import_config.proto    |   108 +
 .../discoveryengine/v1/purge_config.proto     |    38 +
 .../discoveryengine/v1/search_service.proto   |   204 +-
 .../v1/user_event_service.proto               |     3 +
 .../protos/protos.d.ts                        |  5378 ++--
 .../protos/protos.js                          | 22269 ++++++++++------
 .../protos/protos.json                        |   556 +-
 .../samples/README.md                         |    36 +
 ...n_service.import_completion_suggestions.js |    80 +
 ...on_service.purge_completion_suggestions.js |    64 +
 ...versational_search_service.answer_query.js |    18 +
 .../v1/document_service.import_documents.js   |     4 +
 .../generated/v1/search_service.search.js     |    43 +
 ...adata_google.cloud.discoveryengine.v1.json |   126 +-
 .../src/v1/completion_service_client.ts       |   597 +
 .../v1/completion_service_client_config.json  |    10 +
 .../src/v1/completion_service_proto_list.json |     1 +
 .../src/v1/control_service_client.ts          |   268 +
 .../src/v1/control_service_proto_list.json    |     1 +
 .../conversational_search_service_client.ts   |   286 +
 ...versational_search_service_proto_list.json |     1 +
 .../src/v1/data_store_service_client.ts       |   268 +
 .../src/v1/data_store_service_proto_list.json |     1 +
 .../src/v1/document_service_client.ts         |   270 +
 .../src/v1/document_service_proto_list.json   |     1 +
 .../src/v1/engine_service_client.ts           |   268 +
 .../src/v1/engine_service_proto_list.json     |     1 +
 .../src/v1/gapic_metadata.json                |    20 +
 .../v1/grounded_generation_service_client.ts  |   268 +
 ...rounded_generation_service_proto_list.json |     1 +
 .../src/v1/project_service_client.ts          |   268 +
 .../src/v1/project_service_proto_list.json    |     1 +
 .../src/v1/rank_service_client.ts             |   268 +
 .../src/v1/rank_service_proto_list.json       |     1 +
 .../src/v1/recommendation_service_client.ts   |   268 +
 .../v1/recommendation_service_proto_list.json |     1 +
 .../src/v1/schema_service_client.ts           |   268 +
 .../src/v1/schema_service_proto_list.json     |     1 +
 .../src/v1/search_service_client.ts           |   391 +
 .../src/v1/search_service_proto_list.json     |     1 +
 .../v1/site_search_engine_service_client.ts   |   268 +
 ...site_search_engine_service_proto_list.json |     1 +
 .../src/v1/user_event_service_client.ts       |   268 +
 .../src/v1/user_event_service_proto_list.json |     1 +
 .../test/gapic_completion_service_v1.ts       |   706 +
 .../test/gapic_control_service_v1.ts          |   310 +
 .../gapic_conversational_search_service_v1.ts |   316 +
 .../test/gapic_data_store_service_v1.ts       |   310 +
 .../test/gapic_document_service_v1.ts         |   310 +
 .../test/gapic_engine_service_v1.ts           |   310 +
 .../gapic_grounded_generation_service_v1.ts   |   312 +
 .../test/gapic_project_service_v1.ts          |   310 +
 .../test/gapic_rank_service_v1.ts             |   310 +
 .../test/gapic_recommendation_service_v1.ts   |   312 +
 .../test/gapic_schema_service_v1.ts           |   310 +
 .../test/gapic_search_service_v1.ts           |   310 +
 .../gapic_site_search_engine_service_v1.ts    |   312 +
 .../test/gapic_user_event_service_v1.ts       |   310 +
 67 files changed, 28464 insertions(+), 9763 deletions(-)
 create mode 100644 packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/chunk.proto
 create mode 100644 packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.import_completion_suggestions.js
 create mode 100644 packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.purge_completion_suggestions.js

diff --git a/packages/google-cloud-discoveryengine/README.md b/packages/google-cloud-discoveryengine/README.md
index 3f96c07417f..b5a1c926592 100644
--- a/packages/google-cloud-discoveryengine/README.md
+++ b/packages/google-cloud-discoveryengine/README.md
@@ -126,7 +126,9 @@ Samples are in the [`samples/`](https://github.com/googleapis/google-cloud-node/
 | Sample                      | Source Code                       | Try it |
 | --------------------------- | --------------------------------- | ------ |
 | Completion_service.complete_query | [source code](https://github.com/googleapis/google-cloud-node/blob/main/packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.complete_query.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/google-cloud-node&page=editor&open_in_editor=packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.complete_query.js,packages/google-cloud-discoveryengine/samples/README.md) |
+| Completion_service.import_completion_suggestions | [source code](https://github.com/googleapis/google-cloud-node/blob/main/packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.import_completion_suggestions.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/google-cloud-node&page=editor&open_in_editor=packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.import_completion_suggestions.js,packages/google-cloud-discoveryengine/samples/README.md) |
 | Completion_service.import_suggestion_deny_list_entries | [source code](https://github.com/googleapis/google-cloud-node/blob/main/packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.import_suggestion_deny_list_entries.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/google-cloud-node&page=editor&open_in_editor=packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.import_suggestion_deny_list_entries.js,packages/google-cloud-discoveryengine/samples/README.md) |
+| Completion_service.purge_completion_suggestions | [source code](https://github.com/googleapis/google-cloud-node/blob/main/packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.purge_completion_suggestions.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/google-cloud-node&page=editor&open_in_editor=packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.purge_completion_suggestions.js,packages/google-cloud-discoveryengine/samples/README.md) |
 | Completion_service.purge_suggestion_deny_list_entries | [source code](https://github.com/googleapis/google-cloud-node/blob/main/packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.purge_suggestion_deny_list_entries.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/google-cloud-node&page=editor&open_in_editor=packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.purge_suggestion_deny_list_entries.js,packages/google-cloud-discoveryengine/samples/README.md) |
 | Control_service.create_control | [source code](https://github.com/googleapis/google-cloud-node/blob/main/packages/google-cloud-discoveryengine/samples/generated/v1/control_service.create_control.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/google-cloud-node&page=editor&open_in_editor=packages/google-cloud-discoveryengine/samples/generated/v1/control_service.create_control.js,packages/google-cloud-discoveryengine/samples/README.md) |
 | Control_service.delete_control | [source code](https://github.com/googleapis/google-cloud-node/blob/main/packages/google-cloud-discoveryengine/samples/generated/v1/control_service.delete_control.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/google-cloud-node&page=editor&open_in_editor=packages/google-cloud-discoveryengine/samples/generated/v1/control_service.delete_control.js,packages/google-cloud-discoveryengine/samples/README.md) |
diff --git a/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/answer.proto b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/answer.proto
index c555f66e87b..f24e88174ed 100644
--- a/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/answer.proto
+++ b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/answer.proto
@@ -188,6 +188,13 @@ message Answer {
           // If citation_type is CHUNK_LEVEL_CITATION and chunk mode is on,
           // populate chunk info.
           repeated ChunkInfo chunk_info = 5;
+
+          // Data representation.
+          // The structured JSON data for the document.
+          // It's populated from the struct data from the Document (code
+          // pointer: http://shortn/_objzAfIiHq), or the Chunk in search result
+          // (code pointer: http://shortn/_Ipo6KFFGBL).
+          google.protobuf.Struct struct_data = 6;
         }
 
         // Search results observed by the search action, it can be snippets info
@@ -296,6 +303,12 @@ message Answer {
     // Google skips the answer if there is a potential policy violation
     // detected. This includes content that may be violent or toxic.
     POTENTIAL_POLICY_VIOLATION = 4;
+
+    // The no relevant content case.
+    //
+    // Google skips the answer if there is no relevant content in the
+    // retrieved search results.
+    NO_RELEVANT_CONTENT = 5;
   }
 
   // Immutable. Fully qualified name
diff --git a/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/chunk.proto b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/chunk.proto
new file mode 100644
index 00000000000..06541029e65
--- /dev/null
+++ b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/chunk.proto
@@ -0,0 +1,119 @@
+// Copyright 2024 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package google.cloud.discoveryengine.v1;
+
+import "google/api/field_behavior.proto";
+import "google/api/resource.proto";
+import "google/protobuf/struct.proto";
+
+option csharp_namespace = "Google.Cloud.DiscoveryEngine.V1";
+option go_package = "cloud.google.com/go/discoveryengine/apiv1/discoveryenginepb;discoveryenginepb";
+option java_multiple_files = true;
+option java_outer_classname = "ChunkProto";
+option java_package = "com.google.cloud.discoveryengine.v1";
+option objc_class_prefix = "DISCOVERYENGINE";
+option php_namespace = "Google\\Cloud\\DiscoveryEngine\\V1";
+option ruby_package = "Google::Cloud::DiscoveryEngine::V1";
+
+// Chunk captures all raw metadata information of items to be recommended or
+// searched in the chunk mode.
+message Chunk {
+  option (google.api.resource) = {
+    type: "discoveryengine.googleapis.com/Chunk"
+    pattern: "projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}"
+    pattern: "projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}"
+  };
+
+  // Document metadata contains the information of the document of the current
+  // chunk.
+  message DocumentMetadata {
+    // Uri of the document.
+    string uri = 1;
+
+    // Title of the document.
+    string title = 2;
+
+    // Data representation.
+    // The structured JSON data for the document. It should conform to the
+    // registered [Schema][google.cloud.discoveryengine.v1.Schema] or an
+    // `INVALID_ARGUMENT` error is thrown.
+    google.protobuf.Struct struct_data = 3;
+  }
+
+  // Page span of the chunk.
+  message PageSpan {
+    // The start page of the chunk.
+    int32 page_start = 1;
+
+    // The end page of the chunk.
+    int32 page_end = 2;
+  }
+
+  // Metadata of the current chunk. This field is only populated on
+  // [SearchService.Search][google.cloud.discoveryengine.v1.SearchService.Search]
+  // API.
+  message ChunkMetadata {
+    // The previous chunks of the current chunk. The number is controlled by
+    // [SearchRequest.ContentSearchSpec.ChunkSpec.num_previous_chunks][google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec.num_previous_chunks].
+    // This field is only populated on
+    // [SearchService.Search][google.cloud.discoveryengine.v1.SearchService.Search]
+    // API.
+    repeated Chunk previous_chunks = 1;
+
+    // The next chunks of the current chunk. The number is controlled by
+    // [SearchRequest.ContentSearchSpec.ChunkSpec.num_next_chunks][google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec.num_next_chunks].
+    // This field is only populated on
+    // [SearchService.Search][google.cloud.discoveryengine.v1.SearchService.Search]
+    // API.
+    repeated Chunk next_chunks = 2;
+  }
+
+  // The full resource name of the chunk.
+  // Format:
+  // `projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document_id}/chunks/{chunk_id}`.
+  //
+  // This field must be a UTF-8 encoded string with a length limit of 1024
+  // characters.
+  string name = 1;
+
+  // Unique chunk ID of the current chunk.
+  string id = 2;
+
+  // Content is a string from a document (parsed content).
+  string content = 3;
+
+  // Output only. Represents the relevance score based on similarity.
+  // Higher score indicates higher chunk relevance.
+  // The score is in range [-1.0, 1.0].
+  // Only populated on [SearchService.SearchResponse][].
+  optional double relevance_score = 8
+      [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // Metadata of the document from the current chunk.
+  DocumentMetadata document_metadata = 5;
+
+  // Output only. This field is OUTPUT_ONLY.
+  // It contains derived data that are not in the original input document.
+  google.protobuf.Struct derived_struct_data = 4
+      [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // Page span of the chunk.
+  PageSpan page_span = 6;
+
+  // Output only. Metadata of the current chunk.
+  ChunkMetadata chunk_metadata = 7 [(google.api.field_behavior) = OUTPUT_ONLY];
+}
diff --git a/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/common.proto b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/common.proto
index 06bf007b923..f4891639aa5 100644
--- a/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/common.proto
+++ b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/common.proto
@@ -57,11 +57,6 @@ option (google.api.resource_definition) = {
   type: "healthcare.googleapis.com/FhirStore"
   pattern: "projects/{project}/locations/{location}/datasets/{dataset}/fhirStores/{fhir_store}"
 };
-option (google.api.resource_definition) = {
-  type: "discoveryengine.googleapis.com/Chunk"
-  pattern: "projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}"
-  pattern: "projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}"
-};
 
 // The industry vertical associated with the
 // [DataStore][google.cloud.discoveryengine.v1.DataStore].
diff --git a/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/completion.proto b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/completion.proto
index 1c5c6a6eca3..17fbd56bbb0 100644
--- a/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/completion.proto
+++ b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/completion.proto
@@ -50,3 +50,34 @@ message SuggestionDenyListEntry {
   // exact phrase, or block any suggestions containing this phrase.
   MatchOperator match_operator = 2 [(google.api.field_behavior) = REQUIRED];
 }
+
+// Autocomplete suggestions that are imported from Customer.
+message CompletionSuggestion {
+  // Ranking metrics of this suggestion.
+  oneof ranking_info {
+    // Global score of this suggestion. Control how this suggestion would be
+    // scored / ranked.
+    double global_score = 2;
+
+    // Frequency of this suggestion. Will be used to rank suggestions when score
+    // is not available.
+    int64 frequency = 3;
+  }
+
+  // Required. The suggestion text.
+  string suggestion = 1 [(google.api.field_behavior) = REQUIRED];
+
+  // BCP-47 language code of this suggestion.
+  string language_code = 4;
+
+  // If two suggestions have the same groupId, they will not be
+  // returned together. Instead the one ranked higher will be returned. This can
+  // be used to deduplicate semantically identical suggestions.
+  string group_id = 5;
+
+  // The score of this suggestion within its group.
+  double group_score = 6;
+
+  // Alternative matching phrases for this suggestion.
+  repeated string alternative_phrases = 7;
+}
diff --git a/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/completion_service.proto b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/completion_service.proto
index 72c8eb86eed..c498a2db951 100644
--- a/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/completion_service.proto
+++ b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/completion_service.proto
@@ -86,6 +86,44 @@ service CompletionService {
       metadata_type: "google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata"
     };
   }
+
+  // Imports
+  // [CompletionSuggestion][google.cloud.discoveryengine.v1.CompletionSuggestion]s
+  // for a DataStore.
+  rpc ImportCompletionSuggestions(ImportCompletionSuggestionsRequest)
+      returns (google.longrunning.Operation) {
+    option (google.api.http) = {
+      post: "/v1/{parent=projects/*/locations/*/collections/*/dataStores/*}/completionSuggestions:import"
+      body: "*"
+      additional_bindings {
+        post: "/v1/{parent=projects/*/locations/*/dataStores/*}/completionSuggestions:import"
+        body: "*"
+      }
+    };
+    option (google.longrunning.operation_info) = {
+      response_type: "google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse"
+      metadata_type: "google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata"
+    };
+  }
+
+  // Permanently deletes all
+  // [CompletionSuggestion][google.cloud.discoveryengine.v1.CompletionSuggestion]s
+  // for a DataStore.
+  rpc PurgeCompletionSuggestions(PurgeCompletionSuggestionsRequest)
+      returns (google.longrunning.Operation) {
+    option (google.api.http) = {
+      post: "/v1/{parent=projects/*/locations/*/collections/*/dataStores/*}/completionSuggestions:purge"
+      body: "*"
+      additional_bindings {
+        post: "/v1/{parent=projects/*/locations/*/dataStores/*}/completionSuggestions:purge"
+        body: "*"
+      }
+    };
+    option (google.longrunning.operation_info) = {
+      response_type: "google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse"
+      metadata_type: "google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata"
+    };
+  }
 }
 
 // Request message for
diff --git a/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/conversational_search_service.proto b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/conversational_search_service.proto
index e8f57b2576f..7bb0bc12c73 100644
--- a/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/conversational_search_service.proto
+++ b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/conversational_search_service.proto
@@ -583,6 +583,17 @@ message AnswerQueryRequest {
       // If this field is unrecognizable, an `INVALID_ARGUMENT` is returned.
       string order_by = 4;
 
+      // Specifies the search result mode. If unspecified, the
+      // search result mode is based on
+      // [DataStore.DocumentProcessingConfig.chunking_config][]:
+      // * If [DataStore.DocumentProcessingConfig.chunking_config][] is
+      // specified,
+      //   it defaults to `CHUNKS`.
+      // * Otherwise, it defaults to `DOCUMENTS`.
+      // See [parse and chunk
+      // documents](https://cloud.google.com/generative-ai-app-builder/docs/parse-chunk-documents)
+      SearchRequest.ContentSearchSpec.SearchResultMode search_result_mode = 5;
+
       // Specs defining dataStores to filter on in a search call and
       // configurations for those dataStores. This is only considered for
       // engines with multiple dataStores use case. For single dataStore within
@@ -706,6 +717,11 @@ message AnswerQueryRequest {
     message QueryRephraserSpec {
       // Disable query rephraser.
       bool disable = 1;
+
+      // Max rephrase steps.
+      // The max number is 5 steps.
+      // If not set or set to < 1, it will be set to 1 by default.
+      int32 max_rephrase_steps = 2;
     }
 
     // Query classification specification.
@@ -777,6 +793,25 @@ message AnswerQueryRequest {
   // The field must be a UTF-8 encoded string with a length limit of 128
   // characters. Otherwise, an  `INVALID_ARGUMENT`  error is returned.
   string user_pseudo_id = 12;
+
+  // The user labels applied to a resource must meet the following requirements:
+  //
+  // * Each resource can have multiple labels, up to a maximum of 64.
+  // * Each label must be a key-value pair.
+  // * Keys have a minimum length of 1 character and a maximum length of 63
+  //   characters and cannot be empty. Values can be empty and have a maximum
+  //   length of 63 characters.
+  // * Keys and values can contain only lowercase letters, numeric characters,
+  //   underscores, and dashes. All characters must use UTF-8 encoding, and
+  //   international characters are allowed.
+  // * The key portion of a label must be unique. However, you can use the same
+  //   key with multiple resources.
+  // * Keys must start with a lowercase letter or international character.
+  //
+  // See [Google Cloud
+  // Document](https://cloud.google.com/resource-manager/docs/creating-managing-labels#requirements)
+  // for more details.
+  map<string, string> user_labels = 13;
 }
 
 // Response message for
diff --git a/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/document.proto b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/document.proto
index d6fbcec3dcf..5c9af32e8e0 100644
--- a/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/document.proto
+++ b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/document.proto
@@ -54,7 +54,7 @@ message Document {
 
       // The URI of the content. Only Cloud Storage URIs (e.g.
       // `gs://bucket-name/path/to/file`) are supported. The maximum file size
-      // is 2.5 MB for text-based formats, 100 MB for other formats.
+      // is 2.5 MB for text-based formats, 200 MB for other formats.
       string uri = 3;
     }
 
diff --git a/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/document_processing_config.proto b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/document_processing_config.proto
index e9ab67ef89b..cef0e861db4 100644
--- a/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/document_processing_config.proto
+++ b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/document_processing_config.proto
@@ -41,6 +41,30 @@ message DocumentProcessingConfig {
     pattern: "projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/documentProcessingConfig"
   };
 
+  // Configuration for chunking config.
+  message ChunkingConfig {
+    // Configuration for the layout based chunking.
+    message LayoutBasedChunkingConfig {
+      // The token size limit for each chunk.
+      //
+      // Supported values: 100-500 (inclusive).
+      // Default value: 500.
+      int32 chunk_size = 1;
+
+      // Whether to include appending different levels of headings to chunks
+      // from the middle of the document to prevent context loss.
+      //
+      // Default value: False.
+      bool include_ancestor_headings = 2;
+    }
+
+    // Additional configs that defines the behavior of the chunking.
+    oneof chunk_mode {
+      // Configuration for the layout based chunking.
+      LayoutBasedChunkingConfig layout_based_chunking_config = 1;
+    }
+  }
+
   // Related configurations applied to a specific type of document parser.
   message ParsingConfig {
     // The digital parsing configurations for documents.
@@ -57,6 +81,9 @@ message DocumentProcessingConfig {
       bool use_native_text = 2;
     }
 
+    // The layout parsing configurations for documents.
+    message LayoutParsingConfig {}
+
     // Configs for document processing types.
     oneof type_dedicated_config {
       // Configurations applied to digital parser.
@@ -65,6 +92,9 @@ message DocumentProcessingConfig {
       // Configurations applied to OCR parser. Currently it only applies to
       // PDFs.
       OcrParsingConfig ocr_parsing_config = 2;
+
+      // Configurations applied to layout parser.
+      LayoutParsingConfig layout_parsing_config = 3;
     }
   }
 
@@ -73,6 +103,9 @@ message DocumentProcessingConfig {
   // `projects/*/locations/*/collections/*/dataStores/*/documentProcessingConfig`.
   string name = 1;
 
+  // Whether chunking mode is enabled.
+  ChunkingConfig chunking_config = 3;
+
   // Configurations for default Document parser.
   // If not specified, we will configure it as default DigitalParsingConfig, and
   // the default parsing config will be applied to all file types for Document
@@ -85,8 +118,10 @@ message DocumentProcessingConfig {
   // * `pdf`: Override parsing config for PDF files, either digital parsing, ocr
   // parsing or layout parsing is supported.
   // * `html`: Override parsing config for HTML files, only digital parsing and
-  // or layout parsing are supported.
+  // layout parsing are supported.
   // * `docx`: Override parsing config for DOCX files, only digital parsing and
-  // or layout parsing are supported.
+  // layout parsing are supported.
+  // * `pptx`: Override parsing config for PPTX files, only digital parsing and
+  // layout parsing are supported.
   map<string, ParsingConfig> parsing_config_overrides = 5;
 }
diff --git a/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/import_config.proto b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/import_config.proto
index 386f22ac444..171a0c1dc8e 100644
--- a/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/import_config.proto
+++ b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/import_config.proto
@@ -325,6 +325,38 @@ message CloudSqlSource {
   bool offload = 6;
 }
 
+// AlloyDB source import data from.
+message AlloyDbSource {
+  // The project ID that the AlloyDB source is in
+  // with a length limit of 128 characters. If not specified, inherits the
+  // project ID from the parent request.
+  string project_id = 1;
+
+  // Required. The AlloyDB location to copy the data from with a length limit of
+  // 256 characters.
+  string location_id = 2 [(google.api.field_behavior) = REQUIRED];
+
+  // Required. The AlloyDB cluster to copy the data from with a length limit of
+  // 256 characters.
+  string cluster_id = 3 [(google.api.field_behavior) = REQUIRED];
+
+  // Required. The AlloyDB database to copy the data from with a length limit of
+  // 256 characters.
+  string database_id = 4 [(google.api.field_behavior) = REQUIRED];
+
+  // Required. The AlloyDB table to copy the data from with a length limit of
+  // 256 characters.
+  string table_id = 5 [(google.api.field_behavior) = REQUIRED];
+
+  // Intermediate Cloud Storage directory used for the import with a length
+  // limit of 2,000 characters. Can be specified if one wants to have the
+  // AlloyDB export to a specific Cloud Storage directory.
+  //
+  // Ensure that the AlloyDB service account has the necessary Cloud
+  // Storage Admin permissions to access the specified Cloud Storage directory.
+  string gcs_staging_dir = 6;
+}
+
 // Firestore source import data from.
 message FirestoreSource {
   // The project ID that the Cloud SQL source is in with a length limit of 128
@@ -498,6 +530,9 @@ message ImportDocumentsRequest {
     // Firestore input source.
     FirestoreSource firestore_source = 13;
 
+    // AlloyDB input source.
+    AlloyDbSource alloy_db_source = 14;
+
     // Cloud Bigtable input source.
     BigtableSource bigtable_source = 15;
   }
@@ -662,3 +697,76 @@ message ImportSuggestionDenyListEntriesMetadata {
   // finish time.
   google.protobuf.Timestamp update_time = 2;
 }
+
+// Request message for
+// [CompletionService.ImportCompletionSuggestions][google.cloud.discoveryengine.v1.CompletionService.ImportCompletionSuggestions]
+// method.
+message ImportCompletionSuggestionsRequest {
+  // The inline source for CompletionSuggestions.
+  message InlineSource {
+    // Required. A list of all denylist entries to import. Max of 1000 items.
+    repeated CompletionSuggestion suggestions = 1
+        [(google.api.field_behavior) = REQUIRED];
+  }
+
+  // The source of the autocomplete suggestions.
+  oneof source {
+    // The Inline source for suggestion entries.
+    InlineSource inline_source = 2;
+
+    // Cloud Storage location for the input content.
+    GcsSource gcs_source = 3;
+
+    // BigQuery input source.
+    BigQuerySource bigquery_source = 4;
+  }
+
+  // Required. The parent data store resource name for which to import customer
+  // autocomplete suggestions.
+  //
+  // Follows pattern `projects/*/locations/*/collections/*/dataStores/*`
+  string parent = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = {
+      type: "discoveryengine.googleapis.com/DataStore"
+    }
+  ];
+
+  // The desired location of errors incurred during the Import.
+  ImportErrorConfig error_config = 5;
+}
+
+// Response of the
+// [CompletionService.ImportCompletionSuggestions][google.cloud.discoveryengine.v1.CompletionService.ImportCompletionSuggestions]
+// method. If the long running operation is done, this message is returned by
+// the google.longrunning.Operations.response field if the operation is
+// successful.
+message ImportCompletionSuggestionsResponse {
+  // A sample of errors encountered while processing the request.
+  repeated google.rpc.Status error_samples = 1;
+
+  // The desired location of errors incurred during the Import.
+  ImportErrorConfig error_config = 2;
+}
+
+// Metadata related to the progress of the ImportCompletionSuggestions
+// operation. This will be returned by the google.longrunning.Operation.metadata
+// field.
+message ImportCompletionSuggestionsMetadata {
+  // Operation create time.
+  google.protobuf.Timestamp create_time = 1;
+
+  // Operation last update time. If the operation is done, this is also the
+  // finish time.
+  google.protobuf.Timestamp update_time = 2;
+
+  // Count of
+  // [CompletionSuggestion][google.cloud.discoveryengine.v1.CompletionSuggestion]s
+  // successfully imported.
+  int64 success_count = 3;
+
+  // Count of
+  // [CompletionSuggestion][google.cloud.discoveryengine.v1.CompletionSuggestion]s
+  // that failed to be imported.
+  int64 failure_count = 4;
+}
diff --git a/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/purge_config.proto b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/purge_config.proto
index 2db39b26d00..2101b695264 100644
--- a/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/purge_config.proto
+++ b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/purge_config.proto
@@ -125,3 +125,41 @@ message PurgeSuggestionDenyListEntriesMetadata {
   // finish time.
   google.protobuf.Timestamp update_time = 2;
 }
+
+// Request message for
+// [CompletionService.PurgeCompletionSuggestions][google.cloud.discoveryengine.v1.CompletionService.PurgeCompletionSuggestions]
+// method.
+message PurgeCompletionSuggestionsRequest {
+  // Required. The parent data store resource name for which to purge completion
+  // suggestions. Follows pattern
+  // projects/*/locations/*/collections/*/dataStores/*.
+  string parent = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = {
+      type: "discoveryengine.googleapis.com/DataStore"
+    }
+  ];
+}
+
+// Response message for
+// [CompletionService.PurgeCompletionSuggestions][google.cloud.discoveryengine.v1.CompletionService.PurgeCompletionSuggestions]
+// method.
+message PurgeCompletionSuggestionsResponse {
+  // Whether the completion suggestions were successfully purged.
+  bool purge_succeeded = 1;
+
+  // A sample of errors encountered while processing the request.
+  repeated google.rpc.Status error_samples = 2;
+}
+
+// Metadata related to the progress of the PurgeCompletionSuggestions
+// operation. This is returned by the google.longrunning.Operation.metadata
+// field.
+message PurgeCompletionSuggestionsMetadata {
+  // Operation create time.
+  google.protobuf.Timestamp create_time = 1;
+
+  // Operation last update time. If the operation is done, this is also the
+  // finish time.
+  google.protobuf.Timestamp update_time = 2;
+}
diff --git a/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/search_service.proto b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/search_service.proto
index 098a4b67ca6..290f1e4550f 100644
--- a/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/search_service.proto
+++ b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/search_service.proto
@@ -20,6 +20,7 @@ import "google/api/annotations.proto";
 import "google/api/client.proto";
 import "google/api/field_behavior.proto";
 import "google/api/resource.proto";
+import "google/cloud/discoveryengine/v1/chunk.proto";
 import "google/cloud/discoveryengine/v1/common.proto";
 import "google/cloud/discoveryengine/v1/document.proto";
 import "google/protobuf/struct.proto";
@@ -70,8 +71,8 @@ message SearchRequest {
   }
 
   // A struct to define data stores to filter on in a search call and
-  // configurations for those data stores. A maximum of 1 DataStoreSpec per
-  // data_store is allowed. Otherwise, an `INVALID_ARGUMENT` error is returned.
+  // configurations for those data stores. Otherwise, an `INVALID_ARGUMENT`
+  // error is returned.
   message DataStoreSpec {
     // Required. Full resource name of
     // [DataStore][google.cloud.discoveryengine.v1.DataStore], such as
@@ -150,6 +151,9 @@ message SearchRequest {
     // Maximum facet values that are returned for this facet. If
     // unspecified, defaults to 20. The maximum allowed value is 300. Values
     // above 300 are coerced to 300.
+    // For aggregation in healthcare search, when the [FacetKey.key] is
+    // "healthcare_aggregation_key", the limit will be overridden to
+    // 10,000 internally, regardless of the value set here.
     //
     // If this field is negative, an  `INVALID_ARGUMENT`  is returned.
     int32 limit = 2;
@@ -367,8 +371,9 @@ message SearchRequest {
       //
       // At most 10 results for documents mode, or 50 for chunks mode, can be
       // used to generate a summary. The chunks mode is used when
-      // [SearchRequest.ContentSearchSpec.search_result_mode][] is set to
-      // [CHUNKS][SearchRequest.ContentSearchSpec.SearchResultMode.CHUNKS].
+      // [SearchRequest.ContentSearchSpec.search_result_mode][google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.search_result_mode]
+      // is set to
+      // [CHUNKS][google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SearchResultMode.CHUNKS].
       int32 summary_result_count = 1;
 
       // Specifies whether to include citations in the summary. The default
@@ -491,6 +496,41 @@ message SearchRequest {
       int32 num_next_segments = 5;
     }
 
+    // Specifies the chunk spec to be returned from the search response.
+    // Only available if the
+    // [SearchRequest.ContentSearchSpec.search_result_mode][google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.search_result_mode]
+    // is set to
+    // [CHUNKS][google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SearchResultMode.CHUNKS]
+    message ChunkSpec {
+      // The number of previous chunks to be returned of the current chunk. The
+      // maximum allowed value is 3.
+      // If not specified, no previous chunks will be returned.
+      int32 num_previous_chunks = 1;
+
+      // The number of next chunks to be returned of the current chunk. The
+      // maximum allowed value is 3.
+      // If not specified, no next chunks will be returned.
+      int32 num_next_chunks = 2;
+    }
+
+    // Specifies the search result mode. If unspecified, the
+    // search result mode is based on
+    // [DataStore.DocumentProcessingConfig.chunking_config][]:
+    // * If [DataStore.DocumentProcessingConfig.chunking_config][] is specified,
+    //   it defaults to `CHUNKS`.
+    // * Otherwise, it defaults to `DOCUMENTS`.
+    enum SearchResultMode {
+      // Default value.
+      SEARCH_RESULT_MODE_UNSPECIFIED = 0;
+
+      // Returns documents in the search result.
+      DOCUMENTS = 1;
+
+      // Returns chunks in the search result. Only available if the
+      // [DataStore.DocumentProcessingConfig.chunking_config][] is specified.
+      CHUNKS = 2;
+    }
+
     // If `snippetSpec` is not specified, snippets are not included in the
     // search response.
     SnippetSpec snippet_spec = 1;
@@ -502,6 +542,85 @@ message SearchRequest {
     // If there is no extractive_content_spec provided, there will be no
     // extractive answer in the search response.
     ExtractiveContentSpec extractive_content_spec = 3;
+
+    // Specifies the search result mode. If unspecified, the
+    // search result mode is based on
+    // [DataStore.DocumentProcessingConfig.chunking_config][]:
+    // * If [DataStore.DocumentProcessingConfig.chunking_config][] is specified,
+    //   it defaults to `CHUNKS`.
+    // * Otherwise, it defaults to `DOCUMENTS`.
+    SearchResultMode search_result_mode = 4;
+
+    // Specifies the chunk spec to be returned from the search response.
+    // Only available if the
+    // [SearchRequest.ContentSearchSpec.search_result_mode][google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.search_result_mode]
+    // is set to
+    // [CHUNKS][google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SearchResultMode.CHUNKS]
+    ChunkSpec chunk_spec = 5;
+  }
+
+  // Specification for search as you type in search requests.
+  message SearchAsYouTypeSpec {
+    // Enum describing under which condition search as you type should occur.
+    enum Condition {
+      // Server behavior defaults to
+      // [Condition.DISABLED][google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec.Condition.DISABLED].
+      CONDITION_UNSPECIFIED = 0;
+
+      // Disables Search As You Type.
+      DISABLED = 1;
+
+      // Enables Search As You Type.
+      ENABLED = 2;
+    }
+
+    // The condition under which search as you type should occur.
+    // Default to
+    // [Condition.DISABLED][google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec.Condition.DISABLED].
+    Condition condition = 1;
+  }
+
+  // Session specification.
+  //
+  // Multi-turn Search feature is currently at private GA stage. Please use
+  // v1alpha or v1beta version instead before we launch this feature to public
+  // GA. Or ask for allowlisting through Google Support team.
+  message SessionSpec {
+    // If set, the search result gets stored to the "turn" specified by this
+    // query ID.
+    //
+    // Example: Let's say the session looks like this:
+    //   session {
+    //     name: ".../sessions/xxx"
+    //     turns {
+    //       query { text: "What is foo?" query_id: ".../questions/yyy" }
+    //       answer: "Foo is ..."
+    //     }
+    //     turns {
+    //       query { text: "How about bar then?" query_id: ".../questions/zzz" }
+    //     }
+    //   }
+    //
+    // The user can call /search API with a request like this:
+    //
+    //    session: ".../sessions/xxx"
+    //    session_spec { query_id: ".../questions/zzz" }
+    //
+    // Then, the API stores the search result, associated with the last turn.
+    // The stored search result can be used by a subsequent /answer API call
+    // (with the session ID and the query ID specified). Also, it is possible
+    // to call /search and /answer in parallel with the same session ID & query
+    // ID.
+    string query_id = 1;
+
+    // The number of top search results to persist. The persisted search results
+    // can be used for the subsequent /answer api call.
+    //
+    // This field is simliar to the `summary_result_count` field in
+    // [SearchRequest.ContentSearchSpec.SummarySpec.summary_result_count][google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SummarySpec.summary_result_count].
+    //
+    // At most 10 results for documents mode, or 50 for chunks mode.
+    optional int32 search_result_persistence_count = 2;
   }
 
   // Required. The resource name of the Search serving config, such as
@@ -617,6 +736,13 @@ message SearchRequest {
   // is used to deduce `device_type` for analytics.
   UserInfo user_info = 21;
 
+  // The BCP-47 language code, such as "en-US" or "sr-Latn". For more
+  // information, see [Standard
+  // fields](https://cloud.google.com/apis/design/standard_fields). This field
+  // helps to better interpret the query. If a value isn't specified, the query
+  // language code is automatically detected, which may not be accurate.
+  string language_code = 35;
+
   // Facet specifications for faceted search. If empty, no facets are returned.
   //
   // A maximum of 100 values are allowed. Otherwise, an  `INVALID_ARGUMENT`
@@ -694,6 +820,46 @@ message SearchRequest {
   // Document](https://cloud.google.com/resource-manager/docs/creating-managing-labels#requirements)
   // for more details.
   map<string, string> user_labels = 22;
+
+  // Search as you type configuration. Only supported for the
+  // [IndustryVertical.MEDIA][google.cloud.discoveryengine.v1.IndustryVertical.MEDIA]
+  // vertical.
+  SearchAsYouTypeSpec search_as_you_type_spec = 31;
+
+  // The session resource name. Optional.
+  //
+  // Session allows users to do multi-turn /search API calls or coordination
+  // between /search API calls and /answer API calls.
+  //
+  // Example #1 (multi-turn /search API calls):
+  //   1. Call /search API with the auto-session mode (see below).
+  //   2. Call /search API with the session ID generated in the first call.
+  //      Here, the previous search query gets considered in query
+  //      standing. I.e., if the first query is "How did Alphabet do in 2022?"
+  //      and the current query is "How about 2023?", the current query will
+  //      be interpreted as "How did Alphabet do in 2023?".
+  //
+  // Example #2 (coordination between /search API calls and /answer API calls):
+  //   1. Call /search API with the auto-session mode (see below).
+  //   2. Call /answer API with the session ID generated in the first call.
+  //      Here, the answer generation happens in the context of the search
+  //      results from the first search call.
+  //
+  // Auto-session mode: when `projects/.../sessions/-` is used, a new session
+  // gets automatically created. Otherwise, users can use the create-session API
+  // to create a session manually.
+  //
+  // Multi-turn Search feature is currently at private GA stage. Please use
+  // v1alpha or v1beta version instead before we launch this feature to public
+  // GA. Or ask for allowlisting through Google Support team.
+  string session = 41 [(google.api.resource_reference) = {
+    type: "discoveryengine.googleapis.com/Session"
+  }];
+
+  // Session specification.
+  //
+  // Can be used only when `session` is set.
+  SessionSpec session_spec = 42;
 }
 
 // Response message for
@@ -709,6 +875,12 @@ message SearchResponse {
     // The document data snippet in the search response. Only fields that are
     // marked as `retrievable` are populated.
     Document document = 2;
+
+    // The chunk data in the search response if the
+    // [SearchRequest.ContentSearchSpec.search_result_mode][google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.search_result_mode]
+    // is set to
+    // [CHUNKS][google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SearchResultMode.CHUNKS].
+    Chunk chunk = 18;
   }
 
   // A facet result.
@@ -890,6 +1062,23 @@ message SearchResponse {
     int64 pinned_result_count = 2;
   }
 
+  // Information about the session.
+  message SessionInfo {
+    // Name of the session.
+    // If the auto-session mode is used (when
+    // [SearchRequest.session][google.cloud.discoveryengine.v1.SearchRequest.session]
+    // ends with "-"), this field holds the newly generated session name.
+    string name = 1;
+
+    // Query ID that corresponds to this search API call.
+    // One session can have multiple turns, each with a unique query ID.
+    //
+    // By specifying the session name and this query ID in the Answer API call,
+    // the answer generation happens in the context of the search results from
+    // this search call.
+    string query_id = 2;
+  }
+
   // A list of matched documents. The order represents the ranking.
   repeated SearchResult results = 1;
 
@@ -936,4 +1125,11 @@ message SearchResponse {
 
   // Query expansion information for the returned results.
   QueryExpansionInfo query_expansion_info = 14;
+
+  // Session information.
+  //
+  // Only set if
+  // [SearchRequest.session][google.cloud.discoveryengine.v1.SearchRequest.session]
+  // is provided. See its description for more details.
+  SessionInfo session_info = 19;
 }
diff --git a/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/user_event_service.proto b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/user_event_service.proto
index 942912ee0d3..7ec0f7ca633 100644
--- a/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/user_event_service.proto
+++ b/packages/google-cloud-discoveryengine/protos/google/cloud/discoveryengine/v1/user_event_service.proto
@@ -67,6 +67,9 @@ service UserEventService {
       additional_bindings {
         get: "/v1/{parent=projects/*/locations/*/collections/*/dataStores/*}/userEvents:collect"
       }
+      additional_bindings {
+        get: "/v1/{parent=projects/*/locations/*}/userEvents:collect"
+      }
     };
   }
 
diff --git a/packages/google-cloud-discoveryengine/protos/protos.d.ts b/packages/google-cloud-discoveryengine/protos/protos.d.ts
index 175cc758ead..30d1e8a47d1 100644
--- a/packages/google-cloud-discoveryengine/protos/protos.d.ts
+++ b/packages/google-cloud-discoveryengine/protos/protos.d.ts
@@ -1407,6 +1407,9 @@ export namespace google {
 
                                     /** SearchResult chunkInfo */
                                     chunkInfo?: (google.cloud.discoveryengine.v1.Answer.Step.Action.Observation.SearchResult.IChunkInfo[]|null);
+
+                                    /** SearchResult structData */
+                                    structData?: (google.protobuf.IStruct|null);
                                 }
 
                                 /** Represents a SearchResult. */
@@ -1433,6 +1436,9 @@ export namespace google {
                                     /** SearchResult chunkInfo. */
                                     public chunkInfo: google.cloud.discoveryengine.v1.Answer.Step.Action.Observation.SearchResult.IChunkInfo[];
 
+                                    /** SearchResult structData. */
+                                    public structData?: (google.protobuf.IStruct|null);
+
                                     /**
                                      * Creates a new SearchResult instance using the specified properties.
                                      * @param [properties] Properties to set
@@ -1967,256 +1973,717 @@ export namespace google {
                         ADVERSARIAL_QUERY_IGNORED = 1,
                         NON_ANSWER_SEEKING_QUERY_IGNORED = 2,
                         OUT_OF_DOMAIN_QUERY_IGNORED = 3,
-                        POTENTIAL_POLICY_VIOLATION = 4
+                        POTENTIAL_POLICY_VIOLATION = 4,
+                        NO_RELEVANT_CONTENT = 5
                     }
                 }
 
-                /** IndustryVertical enum. */
-                enum IndustryVertical {
-                    INDUSTRY_VERTICAL_UNSPECIFIED = 0,
-                    GENERIC = 1,
-                    MEDIA = 2,
-                    HEALTHCARE_FHIR = 7
-                }
-
-                /** SolutionType enum. */
-                enum SolutionType {
-                    SOLUTION_TYPE_UNSPECIFIED = 0,
-                    SOLUTION_TYPE_RECOMMENDATION = 1,
-                    SOLUTION_TYPE_SEARCH = 2,
-                    SOLUTION_TYPE_CHAT = 3,
-                    SOLUTION_TYPE_GENERATIVE_CHAT = 4
-                }
+                /** Properties of a Chunk. */
+                interface IChunk {
 
-                /** SearchUseCase enum. */
-                enum SearchUseCase {
-                    SEARCH_USE_CASE_UNSPECIFIED = 0,
-                    SEARCH_USE_CASE_SEARCH = 1,
-                    SEARCH_USE_CASE_BROWSE = 2
-                }
+                    /** Chunk name */
+                    name?: (string|null);
 
-                /** SearchTier enum. */
-                enum SearchTier {
-                    SEARCH_TIER_UNSPECIFIED = 0,
-                    SEARCH_TIER_STANDARD = 1,
-                    SEARCH_TIER_ENTERPRISE = 2
-                }
+                    /** Chunk id */
+                    id?: (string|null);
 
-                /** SearchAddOn enum. */
-                enum SearchAddOn {
-                    SEARCH_ADD_ON_UNSPECIFIED = 0,
-                    SEARCH_ADD_ON_LLM = 1
-                }
+                    /** Chunk content */
+                    content?: (string|null);
 
-                /** Properties of an Interval. */
-                interface IInterval {
+                    /** Chunk relevanceScore */
+                    relevanceScore?: (number|null);
 
-                    /** Interval minimum */
-                    minimum?: (number|null);
+                    /** Chunk documentMetadata */
+                    documentMetadata?: (google.cloud.discoveryengine.v1.Chunk.IDocumentMetadata|null);
 
-                    /** Interval exclusiveMinimum */
-                    exclusiveMinimum?: (number|null);
+                    /** Chunk derivedStructData */
+                    derivedStructData?: (google.protobuf.IStruct|null);
 
-                    /** Interval maximum */
-                    maximum?: (number|null);
+                    /** Chunk pageSpan */
+                    pageSpan?: (google.cloud.discoveryengine.v1.Chunk.IPageSpan|null);
 
-                    /** Interval exclusiveMaximum */
-                    exclusiveMaximum?: (number|null);
+                    /** Chunk chunkMetadata */
+                    chunkMetadata?: (google.cloud.discoveryengine.v1.Chunk.IChunkMetadata|null);
                 }
 
-                /** Represents an Interval. */
-                class Interval implements IInterval {
+                /** Represents a Chunk. */
+                class Chunk implements IChunk {
 
                     /**
-                     * Constructs a new Interval.
+                     * Constructs a new Chunk.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.cloud.discoveryengine.v1.IInterval);
+                    constructor(properties?: google.cloud.discoveryengine.v1.IChunk);
 
-                    /** Interval minimum. */
-                    public minimum?: (number|null);
+                    /** Chunk name. */
+                    public name: string;
 
-                    /** Interval exclusiveMinimum. */
-                    public exclusiveMinimum?: (number|null);
+                    /** Chunk id. */
+                    public id: string;
 
-                    /** Interval maximum. */
-                    public maximum?: (number|null);
+                    /** Chunk content. */
+                    public content: string;
 
-                    /** Interval exclusiveMaximum. */
-                    public exclusiveMaximum?: (number|null);
+                    /** Chunk relevanceScore. */
+                    public relevanceScore?: (number|null);
 
-                    /** Interval min. */
-                    public min?: ("minimum"|"exclusiveMinimum");
+                    /** Chunk documentMetadata. */
+                    public documentMetadata?: (google.cloud.discoveryengine.v1.Chunk.IDocumentMetadata|null);
 
-                    /** Interval max. */
-                    public max?: ("maximum"|"exclusiveMaximum");
+                    /** Chunk derivedStructData. */
+                    public derivedStructData?: (google.protobuf.IStruct|null);
+
+                    /** Chunk pageSpan. */
+                    public pageSpan?: (google.cloud.discoveryengine.v1.Chunk.IPageSpan|null);
+
+                    /** Chunk chunkMetadata. */
+                    public chunkMetadata?: (google.cloud.discoveryengine.v1.Chunk.IChunkMetadata|null);
+
+                    /** Chunk _relevanceScore. */
+                    public _relevanceScore?: "relevanceScore";
 
                     /**
-                     * Creates a new Interval instance using the specified properties.
+                     * Creates a new Chunk instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns Interval instance
+                     * @returns Chunk instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.IInterval): google.cloud.discoveryengine.v1.Interval;
+                    public static create(properties?: google.cloud.discoveryengine.v1.IChunk): google.cloud.discoveryengine.v1.Chunk;
 
                     /**
-                     * Encodes the specified Interval message. Does not implicitly {@link google.cloud.discoveryengine.v1.Interval.verify|verify} messages.
-                     * @param message Interval message or plain object to encode
+                     * Encodes the specified Chunk message. Does not implicitly {@link google.cloud.discoveryengine.v1.Chunk.verify|verify} messages.
+                     * @param message Chunk message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.IInterval, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.IChunk, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified Interval message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.Interval.verify|verify} messages.
-                     * @param message Interval message or plain object to encode
+                     * Encodes the specified Chunk message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.Chunk.verify|verify} messages.
+                     * @param message Chunk message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IInterval, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IChunk, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes an Interval message from the specified reader or buffer.
+                     * Decodes a Chunk message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns Interval
+                     * @returns Chunk
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.Interval;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.Chunk;
 
                     /**
-                     * Decodes an Interval message from the specified reader or buffer, length delimited.
+                     * Decodes a Chunk message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns Interval
+                     * @returns Chunk
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.Interval;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.Chunk;
 
                     /**
-                     * Verifies an Interval message.
+                     * Verifies a Chunk message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates an Interval message from a plain object. Also converts values to their respective internal types.
+                     * Creates a Chunk message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns Interval
+                     * @returns Chunk
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.Interval;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.Chunk;
 
                     /**
-                     * Creates a plain object from an Interval message. Also converts values to other types if specified.
-                     * @param message Interval
+                     * Creates a plain object from a Chunk message. Also converts values to other types if specified.
+                     * @param message Chunk
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.Interval, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.Chunk, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this Interval to JSON.
+                     * Converts this Chunk to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for Interval
+                     * Gets the default type url for Chunk
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                /** Properties of a CustomAttribute. */
-                interface ICustomAttribute {
+                namespace Chunk {
 
-                    /** CustomAttribute text */
-                    text?: (string[]|null);
+                    /** Properties of a DocumentMetadata. */
+                    interface IDocumentMetadata {
 
-                    /** CustomAttribute numbers */
-                    numbers?: (number[]|null);
-                }
+                        /** DocumentMetadata uri */
+                        uri?: (string|null);
 
-                /** Represents a CustomAttribute. */
-                class CustomAttribute implements ICustomAttribute {
+                        /** DocumentMetadata title */
+                        title?: (string|null);
 
-                    /**
-                     * Constructs a new CustomAttribute.
-                     * @param [properties] Properties to set
-                     */
-                    constructor(properties?: google.cloud.discoveryengine.v1.ICustomAttribute);
+                        /** DocumentMetadata structData */
+                        structData?: (google.protobuf.IStruct|null);
+                    }
 
-                    /** CustomAttribute text. */
-                    public text: string[];
+                    /** Represents a DocumentMetadata. */
+                    class DocumentMetadata implements IDocumentMetadata {
 
-                    /** CustomAttribute numbers. */
-                    public numbers: number[];
+                        /**
+                         * Constructs a new DocumentMetadata.
+                         * @param [properties] Properties to set
+                         */
+                        constructor(properties?: google.cloud.discoveryengine.v1.Chunk.IDocumentMetadata);
 
-                    /**
-                     * Creates a new CustomAttribute instance using the specified properties.
-                     * @param [properties] Properties to set
-                     * @returns CustomAttribute instance
-                     */
-                    public static create(properties?: google.cloud.discoveryengine.v1.ICustomAttribute): google.cloud.discoveryengine.v1.CustomAttribute;
+                        /** DocumentMetadata uri. */
+                        public uri: string;
 
-                    /**
-                     * Encodes the specified CustomAttribute message. Does not implicitly {@link google.cloud.discoveryengine.v1.CustomAttribute.verify|verify} messages.
-                     * @param message CustomAttribute message or plain object to encode
-                     * @param [writer] Writer to encode to
-                     * @returns Writer
-                     */
-                    public static encode(message: google.cloud.discoveryengine.v1.ICustomAttribute, writer?: $protobuf.Writer): $protobuf.Writer;
+                        /** DocumentMetadata title. */
+                        public title: string;
 
-                    /**
-                     * Encodes the specified CustomAttribute message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.CustomAttribute.verify|verify} messages.
-                     * @param message CustomAttribute message or plain object to encode
-                     * @param [writer] Writer to encode to
-                     * @returns Writer
-                     */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.ICustomAttribute, writer?: $protobuf.Writer): $protobuf.Writer;
+                        /** DocumentMetadata structData. */
+                        public structData?: (google.protobuf.IStruct|null);
 
-                    /**
-                     * Decodes a CustomAttribute message from the specified reader or buffer.
-                     * @param reader Reader or buffer to decode from
-                     * @param [length] Message length if known beforehand
-                     * @returns CustomAttribute
-                     * @throws {Error} If the payload is not a reader or valid buffer
-                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                     */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.CustomAttribute;
+                        /**
+                         * Creates a new DocumentMetadata instance using the specified properties.
+                         * @param [properties] Properties to set
+                         * @returns DocumentMetadata instance
+                         */
+                        public static create(properties?: google.cloud.discoveryengine.v1.Chunk.IDocumentMetadata): google.cloud.discoveryengine.v1.Chunk.DocumentMetadata;
 
-                    /**
-                     * Decodes a CustomAttribute message from the specified reader or buffer, length delimited.
-                     * @param reader Reader or buffer to decode from
-                     * @returns CustomAttribute
-                     * @throws {Error} If the payload is not a reader or valid buffer
-                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                     */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.CustomAttribute;
+                        /**
+                         * Encodes the specified DocumentMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.Chunk.DocumentMetadata.verify|verify} messages.
+                         * @param message DocumentMetadata message or plain object to encode
+                         * @param [writer] Writer to encode to
+                         * @returns Writer
+                         */
+                        public static encode(message: google.cloud.discoveryengine.v1.Chunk.IDocumentMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
 
-                    /**
-                     * Verifies a CustomAttribute message.
-                     * @param message Plain object to verify
-                     * @returns `null` if valid, otherwise the reason why it is not
-                     */
-                    public static verify(message: { [k: string]: any }): (string|null);
+                        /**
+                         * Encodes the specified DocumentMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.Chunk.DocumentMetadata.verify|verify} messages.
+                         * @param message DocumentMetadata message or plain object to encode
+                         * @param [writer] Writer to encode to
+                         * @returns Writer
+                         */
+                        public static encodeDelimited(message: google.cloud.discoveryengine.v1.Chunk.IDocumentMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
 
-                    /**
-                     * Creates a CustomAttribute message from a plain object. Also converts values to their respective internal types.
-                     * @param object Plain object
-                     * @returns CustomAttribute
-                     */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.CustomAttribute;
+                        /**
+                         * Decodes a DocumentMetadata message from the specified reader or buffer.
+                         * @param reader Reader or buffer to decode from
+                         * @param [length] Message length if known beforehand
+                         * @returns DocumentMetadata
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.Chunk.DocumentMetadata;
 
-                    /**
-                     * Creates a plain object from a CustomAttribute message. Also converts values to other types if specified.
-                     * @param message CustomAttribute
-                     * @param [options] Conversion options
-                     * @returns Plain object
-                     */
-                    public static toObject(message: google.cloud.discoveryengine.v1.CustomAttribute, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                        /**
+                         * Decodes a DocumentMetadata message from the specified reader or buffer, length delimited.
+                         * @param reader Reader or buffer to decode from
+                         * @returns DocumentMetadata
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.Chunk.DocumentMetadata;
+
+                        /**
+                         * Verifies a DocumentMetadata message.
+                         * @param message Plain object to verify
+                         * @returns `null` if valid, otherwise the reason why it is not
+                         */
+                        public static verify(message: { [k: string]: any }): (string|null);
+
+                        /**
+                         * Creates a DocumentMetadata message from a plain object. Also converts values to their respective internal types.
+                         * @param object Plain object
+                         * @returns DocumentMetadata
+                         */
+                        public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.Chunk.DocumentMetadata;
+
+                        /**
+                         * Creates a plain object from a DocumentMetadata message. Also converts values to other types if specified.
+                         * @param message DocumentMetadata
+                         * @param [options] Conversion options
+                         * @returns Plain object
+                         */
+                        public static toObject(message: google.cloud.discoveryengine.v1.Chunk.DocumentMetadata, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                        /**
+                         * Converts this DocumentMetadata to JSON.
+                         * @returns JSON object
+                         */
+                        public toJSON(): { [k: string]: any };
+
+                        /**
+                         * Gets the default type url for DocumentMetadata
+                         * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns The default type url
+                         */
+                        public static getTypeUrl(typeUrlPrefix?: string): string;
+                    }
+
+                    /** Properties of a PageSpan. */
+                    interface IPageSpan {
+
+                        /** PageSpan pageStart */
+                        pageStart?: (number|null);
+
+                        /** PageSpan pageEnd */
+                        pageEnd?: (number|null);
+                    }
+
+                    /** Represents a PageSpan. */
+                    class PageSpan implements IPageSpan {
+
+                        /**
+                         * Constructs a new PageSpan.
+                         * @param [properties] Properties to set
+                         */
+                        constructor(properties?: google.cloud.discoveryengine.v1.Chunk.IPageSpan);
+
+                        /** PageSpan pageStart. */
+                        public pageStart: number;
+
+                        /** PageSpan pageEnd. */
+                        public pageEnd: number;
+
+                        /**
+                         * Creates a new PageSpan instance using the specified properties.
+                         * @param [properties] Properties to set
+                         * @returns PageSpan instance
+                         */
+                        public static create(properties?: google.cloud.discoveryengine.v1.Chunk.IPageSpan): google.cloud.discoveryengine.v1.Chunk.PageSpan;
+
+                        /**
+                         * Encodes the specified PageSpan message. Does not implicitly {@link google.cloud.discoveryengine.v1.Chunk.PageSpan.verify|verify} messages.
+                         * @param message PageSpan message or plain object to encode
+                         * @param [writer] Writer to encode to
+                         * @returns Writer
+                         */
+                        public static encode(message: google.cloud.discoveryengine.v1.Chunk.IPageSpan, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                        /**
+                         * Encodes the specified PageSpan message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.Chunk.PageSpan.verify|verify} messages.
+                         * @param message PageSpan message or plain object to encode
+                         * @param [writer] Writer to encode to
+                         * @returns Writer
+                         */
+                        public static encodeDelimited(message: google.cloud.discoveryengine.v1.Chunk.IPageSpan, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                        /**
+                         * Decodes a PageSpan message from the specified reader or buffer.
+                         * @param reader Reader or buffer to decode from
+                         * @param [length] Message length if known beforehand
+                         * @returns PageSpan
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.Chunk.PageSpan;
+
+                        /**
+                         * Decodes a PageSpan message from the specified reader or buffer, length delimited.
+                         * @param reader Reader or buffer to decode from
+                         * @returns PageSpan
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.Chunk.PageSpan;
+
+                        /**
+                         * Verifies a PageSpan message.
+                         * @param message Plain object to verify
+                         * @returns `null` if valid, otherwise the reason why it is not
+                         */
+                        public static verify(message: { [k: string]: any }): (string|null);
+
+                        /**
+                         * Creates a PageSpan message from a plain object. Also converts values to their respective internal types.
+                         * @param object Plain object
+                         * @returns PageSpan
+                         */
+                        public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.Chunk.PageSpan;
+
+                        /**
+                         * Creates a plain object from a PageSpan message. Also converts values to other types if specified.
+                         * @param message PageSpan
+                         * @param [options] Conversion options
+                         * @returns Plain object
+                         */
+                        public static toObject(message: google.cloud.discoveryengine.v1.Chunk.PageSpan, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                        /**
+                         * Converts this PageSpan to JSON.
+                         * @returns JSON object
+                         */
+                        public toJSON(): { [k: string]: any };
+
+                        /**
+                         * Gets the default type url for PageSpan
+                         * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns The default type url
+                         */
+                        public static getTypeUrl(typeUrlPrefix?: string): string;
+                    }
+
+                    /** Properties of a ChunkMetadata. */
+                    interface IChunkMetadata {
+
+                        /** ChunkMetadata previousChunks */
+                        previousChunks?: (google.cloud.discoveryengine.v1.IChunk[]|null);
+
+                        /** ChunkMetadata nextChunks */
+                        nextChunks?: (google.cloud.discoveryengine.v1.IChunk[]|null);
+                    }
+
+                    /** Represents a ChunkMetadata. */
+                    class ChunkMetadata implements IChunkMetadata {
+
+                        /**
+                         * Constructs a new ChunkMetadata.
+                         * @param [properties] Properties to set
+                         */
+                        constructor(properties?: google.cloud.discoveryengine.v1.Chunk.IChunkMetadata);
+
+                        /** ChunkMetadata previousChunks. */
+                        public previousChunks: google.cloud.discoveryengine.v1.IChunk[];
+
+                        /** ChunkMetadata nextChunks. */
+                        public nextChunks: google.cloud.discoveryengine.v1.IChunk[];
+
+                        /**
+                         * Creates a new ChunkMetadata instance using the specified properties.
+                         * @param [properties] Properties to set
+                         * @returns ChunkMetadata instance
+                         */
+                        public static create(properties?: google.cloud.discoveryengine.v1.Chunk.IChunkMetadata): google.cloud.discoveryengine.v1.Chunk.ChunkMetadata;
+
+                        /**
+                         * Encodes the specified ChunkMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.Chunk.ChunkMetadata.verify|verify} messages.
+                         * @param message ChunkMetadata message or plain object to encode
+                         * @param [writer] Writer to encode to
+                         * @returns Writer
+                         */
+                        public static encode(message: google.cloud.discoveryengine.v1.Chunk.IChunkMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                        /**
+                         * Encodes the specified ChunkMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.Chunk.ChunkMetadata.verify|verify} messages.
+                         * @param message ChunkMetadata message or plain object to encode
+                         * @param [writer] Writer to encode to
+                         * @returns Writer
+                         */
+                        public static encodeDelimited(message: google.cloud.discoveryengine.v1.Chunk.IChunkMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                        /**
+                         * Decodes a ChunkMetadata message from the specified reader or buffer.
+                         * @param reader Reader or buffer to decode from
+                         * @param [length] Message length if known beforehand
+                         * @returns ChunkMetadata
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.Chunk.ChunkMetadata;
+
+                        /**
+                         * Decodes a ChunkMetadata message from the specified reader or buffer, length delimited.
+                         * @param reader Reader or buffer to decode from
+                         * @returns ChunkMetadata
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.Chunk.ChunkMetadata;
+
+                        /**
+                         * Verifies a ChunkMetadata message.
+                         * @param message Plain object to verify
+                         * @returns `null` if valid, otherwise the reason why it is not
+                         */
+                        public static verify(message: { [k: string]: any }): (string|null);
+
+                        /**
+                         * Creates a ChunkMetadata message from a plain object. Also converts values to their respective internal types.
+                         * @param object Plain object
+                         * @returns ChunkMetadata
+                         */
+                        public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.Chunk.ChunkMetadata;
+
+                        /**
+                         * Creates a plain object from a ChunkMetadata message. Also converts values to other types if specified.
+                         * @param message ChunkMetadata
+                         * @param [options] Conversion options
+                         * @returns Plain object
+                         */
+                        public static toObject(message: google.cloud.discoveryengine.v1.Chunk.ChunkMetadata, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                        /**
+                         * Converts this ChunkMetadata to JSON.
+                         * @returns JSON object
+                         */
+                        public toJSON(): { [k: string]: any };
+
+                        /**
+                         * Gets the default type url for ChunkMetadata
+                         * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns The default type url
+                         */
+                        public static getTypeUrl(typeUrlPrefix?: string): string;
+                    }
+                }
+
+                /** IndustryVertical enum. */
+                enum IndustryVertical {
+                    INDUSTRY_VERTICAL_UNSPECIFIED = 0,
+                    GENERIC = 1,
+                    MEDIA = 2,
+                    HEALTHCARE_FHIR = 7
+                }
+
+                /** SolutionType enum. */
+                enum SolutionType {
+                    SOLUTION_TYPE_UNSPECIFIED = 0,
+                    SOLUTION_TYPE_RECOMMENDATION = 1,
+                    SOLUTION_TYPE_SEARCH = 2,
+                    SOLUTION_TYPE_CHAT = 3,
+                    SOLUTION_TYPE_GENERATIVE_CHAT = 4
+                }
+
+                /** SearchUseCase enum. */
+                enum SearchUseCase {
+                    SEARCH_USE_CASE_UNSPECIFIED = 0,
+                    SEARCH_USE_CASE_SEARCH = 1,
+                    SEARCH_USE_CASE_BROWSE = 2
+                }
+
+                /** SearchTier enum. */
+                enum SearchTier {
+                    SEARCH_TIER_UNSPECIFIED = 0,
+                    SEARCH_TIER_STANDARD = 1,
+                    SEARCH_TIER_ENTERPRISE = 2
+                }
+
+                /** SearchAddOn enum. */
+                enum SearchAddOn {
+                    SEARCH_ADD_ON_UNSPECIFIED = 0,
+                    SEARCH_ADD_ON_LLM = 1
+                }
+
+                /** Properties of an Interval. */
+                interface IInterval {
+
+                    /** Interval minimum */
+                    minimum?: (number|null);
+
+                    /** Interval exclusiveMinimum */
+                    exclusiveMinimum?: (number|null);
+
+                    /** Interval maximum */
+                    maximum?: (number|null);
+
+                    /** Interval exclusiveMaximum */
+                    exclusiveMaximum?: (number|null);
+                }
+
+                /** Represents an Interval. */
+                class Interval implements IInterval {
+
+                    /**
+                     * Constructs a new Interval.
+                     * @param [properties] Properties to set
+                     */
+                    constructor(properties?: google.cloud.discoveryengine.v1.IInterval);
+
+                    /** Interval minimum. */
+                    public minimum?: (number|null);
+
+                    /** Interval exclusiveMinimum. */
+                    public exclusiveMinimum?: (number|null);
+
+                    /** Interval maximum. */
+                    public maximum?: (number|null);
+
+                    /** Interval exclusiveMaximum. */
+                    public exclusiveMaximum?: (number|null);
+
+                    /** Interval min. */
+                    public min?: ("minimum"|"exclusiveMinimum");
+
+                    /** Interval max. */
+                    public max?: ("maximum"|"exclusiveMaximum");
+
+                    /**
+                     * Creates a new Interval instance using the specified properties.
+                     * @param [properties] Properties to set
+                     * @returns Interval instance
+                     */
+                    public static create(properties?: google.cloud.discoveryengine.v1.IInterval): google.cloud.discoveryengine.v1.Interval;
+
+                    /**
+                     * Encodes the specified Interval message. Does not implicitly {@link google.cloud.discoveryengine.v1.Interval.verify|verify} messages.
+                     * @param message Interval message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encode(message: google.cloud.discoveryengine.v1.IInterval, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                    /**
+                     * Encodes the specified Interval message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.Interval.verify|verify} messages.
+                     * @param message Interval message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IInterval, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                    /**
+                     * Decodes an Interval message from the specified reader or buffer.
+                     * @param reader Reader or buffer to decode from
+                     * @param [length] Message length if known beforehand
+                     * @returns Interval
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.Interval;
+
+                    /**
+                     * Decodes an Interval message from the specified reader or buffer, length delimited.
+                     * @param reader Reader or buffer to decode from
+                     * @returns Interval
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.Interval;
+
+                    /**
+                     * Verifies an Interval message.
+                     * @param message Plain object to verify
+                     * @returns `null` if valid, otherwise the reason why it is not
+                     */
+                    public static verify(message: { [k: string]: any }): (string|null);
+
+                    /**
+                     * Creates an Interval message from a plain object. Also converts values to their respective internal types.
+                     * @param object Plain object
+                     * @returns Interval
+                     */
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.Interval;
+
+                    /**
+                     * Creates a plain object from an Interval message. Also converts values to other types if specified.
+                     * @param message Interval
+                     * @param [options] Conversion options
+                     * @returns Plain object
+                     */
+                    public static toObject(message: google.cloud.discoveryengine.v1.Interval, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                    /**
+                     * Converts this Interval to JSON.
+                     * @returns JSON object
+                     */
+                    public toJSON(): { [k: string]: any };
+
+                    /**
+                     * Gets the default type url for Interval
+                     * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                     * @returns The default type url
+                     */
+                    public static getTypeUrl(typeUrlPrefix?: string): string;
+                }
+
+                /** Properties of a CustomAttribute. */
+                interface ICustomAttribute {
+
+                    /** CustomAttribute text */
+                    text?: (string[]|null);
+
+                    /** CustomAttribute numbers */
+                    numbers?: (number[]|null);
+                }
+
+                /** Represents a CustomAttribute. */
+                class CustomAttribute implements ICustomAttribute {
+
+                    /**
+                     * Constructs a new CustomAttribute.
+                     * @param [properties] Properties to set
+                     */
+                    constructor(properties?: google.cloud.discoveryengine.v1.ICustomAttribute);
+
+                    /** CustomAttribute text. */
+                    public text: string[];
+
+                    /** CustomAttribute numbers. */
+                    public numbers: number[];
+
+                    /**
+                     * Creates a new CustomAttribute instance using the specified properties.
+                     * @param [properties] Properties to set
+                     * @returns CustomAttribute instance
+                     */
+                    public static create(properties?: google.cloud.discoveryengine.v1.ICustomAttribute): google.cloud.discoveryengine.v1.CustomAttribute;
+
+                    /**
+                     * Encodes the specified CustomAttribute message. Does not implicitly {@link google.cloud.discoveryengine.v1.CustomAttribute.verify|verify} messages.
+                     * @param message CustomAttribute message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encode(message: google.cloud.discoveryengine.v1.ICustomAttribute, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                    /**
+                     * Encodes the specified CustomAttribute message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.CustomAttribute.verify|verify} messages.
+                     * @param message CustomAttribute message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.ICustomAttribute, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                    /**
+                     * Decodes a CustomAttribute message from the specified reader or buffer.
+                     * @param reader Reader or buffer to decode from
+                     * @param [length] Message length if known beforehand
+                     * @returns CustomAttribute
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.CustomAttribute;
+
+                    /**
+                     * Decodes a CustomAttribute message from the specified reader or buffer, length delimited.
+                     * @param reader Reader or buffer to decode from
+                     * @returns CustomAttribute
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.CustomAttribute;
+
+                    /**
+                     * Verifies a CustomAttribute message.
+                     * @param message Plain object to verify
+                     * @returns `null` if valid, otherwise the reason why it is not
+                     */
+                    public static verify(message: { [k: string]: any }): (string|null);
+
+                    /**
+                     * Creates a CustomAttribute message from a plain object. Also converts values to their respective internal types.
+                     * @param object Plain object
+                     * @returns CustomAttribute
+                     */
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.CustomAttribute;
+
+                    /**
+                     * Creates a plain object from a CustomAttribute message. Also converts values to other types if specified.
+                     * @param message CustomAttribute
+                     * @param [options] Conversion options
+                     * @returns Plain object
+                     */
+                    public static toObject(message: google.cloud.discoveryengine.v1.CustomAttribute, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
                      * Converts this CustomAttribute to JSON.
@@ -2448,6 +2915,142 @@ export namespace google {
                     }
                 }
 
+                /** Properties of a CompletionSuggestion. */
+                interface ICompletionSuggestion {
+
+                    /** CompletionSuggestion globalScore */
+                    globalScore?: (number|null);
+
+                    /** CompletionSuggestion frequency */
+                    frequency?: (number|Long|string|null);
+
+                    /** CompletionSuggestion suggestion */
+                    suggestion?: (string|null);
+
+                    /** CompletionSuggestion languageCode */
+                    languageCode?: (string|null);
+
+                    /** CompletionSuggestion groupId */
+                    groupId?: (string|null);
+
+                    /** CompletionSuggestion groupScore */
+                    groupScore?: (number|null);
+
+                    /** CompletionSuggestion alternativePhrases */
+                    alternativePhrases?: (string[]|null);
+                }
+
+                /** Represents a CompletionSuggestion. */
+                class CompletionSuggestion implements ICompletionSuggestion {
+
+                    /**
+                     * Constructs a new CompletionSuggestion.
+                     * @param [properties] Properties to set
+                     */
+                    constructor(properties?: google.cloud.discoveryengine.v1.ICompletionSuggestion);
+
+                    /** CompletionSuggestion globalScore. */
+                    public globalScore?: (number|null);
+
+                    /** CompletionSuggestion frequency. */
+                    public frequency?: (number|Long|string|null);
+
+                    /** CompletionSuggestion suggestion. */
+                    public suggestion: string;
+
+                    /** CompletionSuggestion languageCode. */
+                    public languageCode: string;
+
+                    /** CompletionSuggestion groupId. */
+                    public groupId: string;
+
+                    /** CompletionSuggestion groupScore. */
+                    public groupScore: number;
+
+                    /** CompletionSuggestion alternativePhrases. */
+                    public alternativePhrases: string[];
+
+                    /** CompletionSuggestion rankingInfo. */
+                    public rankingInfo?: ("globalScore"|"frequency");
+
+                    /**
+                     * Creates a new CompletionSuggestion instance using the specified properties.
+                     * @param [properties] Properties to set
+                     * @returns CompletionSuggestion instance
+                     */
+                    public static create(properties?: google.cloud.discoveryengine.v1.ICompletionSuggestion): google.cloud.discoveryengine.v1.CompletionSuggestion;
+
+                    /**
+                     * Encodes the specified CompletionSuggestion message. Does not implicitly {@link google.cloud.discoveryengine.v1.CompletionSuggestion.verify|verify} messages.
+                     * @param message CompletionSuggestion message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encode(message: google.cloud.discoveryengine.v1.ICompletionSuggestion, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                    /**
+                     * Encodes the specified CompletionSuggestion message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.CompletionSuggestion.verify|verify} messages.
+                     * @param message CompletionSuggestion message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.ICompletionSuggestion, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                    /**
+                     * Decodes a CompletionSuggestion message from the specified reader or buffer.
+                     * @param reader Reader or buffer to decode from
+                     * @param [length] Message length if known beforehand
+                     * @returns CompletionSuggestion
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.CompletionSuggestion;
+
+                    /**
+                     * Decodes a CompletionSuggestion message from the specified reader or buffer, length delimited.
+                     * @param reader Reader or buffer to decode from
+                     * @returns CompletionSuggestion
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.CompletionSuggestion;
+
+                    /**
+                     * Verifies a CompletionSuggestion message.
+                     * @param message Plain object to verify
+                     * @returns `null` if valid, otherwise the reason why it is not
+                     */
+                    public static verify(message: { [k: string]: any }): (string|null);
+
+                    /**
+                     * Creates a CompletionSuggestion message from a plain object. Also converts values to their respective internal types.
+                     * @param object Plain object
+                     * @returns CompletionSuggestion
+                     */
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.CompletionSuggestion;
+
+                    /**
+                     * Creates a plain object from a CompletionSuggestion message. Also converts values to other types if specified.
+                     * @param message CompletionSuggestion
+                     * @param [options] Conversion options
+                     * @returns Plain object
+                     */
+                    public static toObject(message: google.cloud.discoveryengine.v1.CompletionSuggestion, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                    /**
+                     * Converts this CompletionSuggestion to JSON.
+                     * @returns JSON object
+                     */
+                    public toJSON(): { [k: string]: any };
+
+                    /**
+                     * Gets the default type url for CompletionSuggestion
+                     * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                     * @returns The default type url
+                     */
+                    public static getTypeUrl(typeUrlPrefix?: string): string;
+                }
+
                 /** Represents a CompletionService */
                 class CompletionService extends $protobuf.rpc.Service {
 
@@ -2509,6 +3112,34 @@ export namespace google {
                      * @returns Promise
                      */
                     public purgeSuggestionDenyListEntries(request: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesRequest): Promise<google.longrunning.Operation>;
+
+                    /**
+                     * Calls ImportCompletionSuggestions.
+                     * @param request ImportCompletionSuggestionsRequest message or plain object
+                     * @param callback Node-style callback called with the error, if any, and Operation
+                     */
+                    public importCompletionSuggestions(request: google.cloud.discoveryengine.v1.IImportCompletionSuggestionsRequest, callback: google.cloud.discoveryengine.v1.CompletionService.ImportCompletionSuggestionsCallback): void;
+
+                    /**
+                     * Calls ImportCompletionSuggestions.
+                     * @param request ImportCompletionSuggestionsRequest message or plain object
+                     * @returns Promise
+                     */
+                    public importCompletionSuggestions(request: google.cloud.discoveryengine.v1.IImportCompletionSuggestionsRequest): Promise<google.longrunning.Operation>;
+
+                    /**
+                     * Calls PurgeCompletionSuggestions.
+                     * @param request PurgeCompletionSuggestionsRequest message or plain object
+                     * @param callback Node-style callback called with the error, if any, and Operation
+                     */
+                    public purgeCompletionSuggestions(request: google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsRequest, callback: google.cloud.discoveryengine.v1.CompletionService.PurgeCompletionSuggestionsCallback): void;
+
+                    /**
+                     * Calls PurgeCompletionSuggestions.
+                     * @param request PurgeCompletionSuggestionsRequest message or plain object
+                     * @returns Promise
+                     */
+                    public purgeCompletionSuggestions(request: google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsRequest): Promise<google.longrunning.Operation>;
                 }
 
                 namespace CompletionService {
@@ -2533,6 +3164,20 @@ export namespace google {
                      * @param [response] Operation
                      */
                     type PurgeSuggestionDenyListEntriesCallback = (error: (Error|null), response?: google.longrunning.Operation) => void;
+
+                    /**
+                     * Callback as used by {@link google.cloud.discoveryengine.v1.CompletionService|importCompletionSuggestions}.
+                     * @param error Error, if any
+                     * @param [response] Operation
+                     */
+                    type ImportCompletionSuggestionsCallback = (error: (Error|null), response?: google.longrunning.Operation) => void;
+
+                    /**
+                     * Callback as used by {@link google.cloud.discoveryengine.v1.CompletionService|purgeCompletionSuggestions}.
+                     * @param error Error, if any
+                     * @param [response] Operation
+                     */
+                    type PurgeCompletionSuggestionsCallback = (error: (Error|null), response?: google.longrunning.Operation) => void;
                 }
 
                 /** Properties of a CompleteQueryRequest. */
@@ -3838,81 +4483,208 @@ export namespace google {
                     /** CloudSqlSource gcsStagingDir. */
                     public gcsStagingDir: string;
 
-                    /** CloudSqlSource offload. */
-                    public offload: boolean;
+                    /** CloudSqlSource offload. */
+                    public offload: boolean;
+
+                    /**
+                     * Creates a new CloudSqlSource instance using the specified properties.
+                     * @param [properties] Properties to set
+                     * @returns CloudSqlSource instance
+                     */
+                    public static create(properties?: google.cloud.discoveryengine.v1.ICloudSqlSource): google.cloud.discoveryengine.v1.CloudSqlSource;
+
+                    /**
+                     * Encodes the specified CloudSqlSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.CloudSqlSource.verify|verify} messages.
+                     * @param message CloudSqlSource message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encode(message: google.cloud.discoveryengine.v1.ICloudSqlSource, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                    /**
+                     * Encodes the specified CloudSqlSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.CloudSqlSource.verify|verify} messages.
+                     * @param message CloudSqlSource message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.ICloudSqlSource, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                    /**
+                     * Decodes a CloudSqlSource message from the specified reader or buffer.
+                     * @param reader Reader or buffer to decode from
+                     * @param [length] Message length if known beforehand
+                     * @returns CloudSqlSource
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.CloudSqlSource;
+
+                    /**
+                     * Decodes a CloudSqlSource message from the specified reader or buffer, length delimited.
+                     * @param reader Reader or buffer to decode from
+                     * @returns CloudSqlSource
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.CloudSqlSource;
+
+                    /**
+                     * Verifies a CloudSqlSource message.
+                     * @param message Plain object to verify
+                     * @returns `null` if valid, otherwise the reason why it is not
+                     */
+                    public static verify(message: { [k: string]: any }): (string|null);
+
+                    /**
+                     * Creates a CloudSqlSource message from a plain object. Also converts values to their respective internal types.
+                     * @param object Plain object
+                     * @returns CloudSqlSource
+                     */
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.CloudSqlSource;
+
+                    /**
+                     * Creates a plain object from a CloudSqlSource message. Also converts values to other types if specified.
+                     * @param message CloudSqlSource
+                     * @param [options] Conversion options
+                     * @returns Plain object
+                     */
+                    public static toObject(message: google.cloud.discoveryengine.v1.CloudSqlSource, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                    /**
+                     * Converts this CloudSqlSource to JSON.
+                     * @returns JSON object
+                     */
+                    public toJSON(): { [k: string]: any };
+
+                    /**
+                     * Gets the default type url for CloudSqlSource
+                     * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                     * @returns The default type url
+                     */
+                    public static getTypeUrl(typeUrlPrefix?: string): string;
+                }
+
+                /** Properties of an AlloyDbSource. */
+                interface IAlloyDbSource {
+
+                    /** AlloyDbSource projectId */
+                    projectId?: (string|null);
+
+                    /** AlloyDbSource locationId */
+                    locationId?: (string|null);
+
+                    /** AlloyDbSource clusterId */
+                    clusterId?: (string|null);
+
+                    /** AlloyDbSource databaseId */
+                    databaseId?: (string|null);
+
+                    /** AlloyDbSource tableId */
+                    tableId?: (string|null);
+
+                    /** AlloyDbSource gcsStagingDir */
+                    gcsStagingDir?: (string|null);
+                }
+
+                /** Represents an AlloyDbSource. */
+                class AlloyDbSource implements IAlloyDbSource {
+
+                    /**
+                     * Constructs a new AlloyDbSource.
+                     * @param [properties] Properties to set
+                     */
+                    constructor(properties?: google.cloud.discoveryengine.v1.IAlloyDbSource);
+
+                    /** AlloyDbSource projectId. */
+                    public projectId: string;
+
+                    /** AlloyDbSource locationId. */
+                    public locationId: string;
+
+                    /** AlloyDbSource clusterId. */
+                    public clusterId: string;
+
+                    /** AlloyDbSource databaseId. */
+                    public databaseId: string;
+
+                    /** AlloyDbSource tableId. */
+                    public tableId: string;
+
+                    /** AlloyDbSource gcsStagingDir. */
+                    public gcsStagingDir: string;
 
                     /**
-                     * Creates a new CloudSqlSource instance using the specified properties.
+                     * Creates a new AlloyDbSource instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns CloudSqlSource instance
+                     * @returns AlloyDbSource instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.ICloudSqlSource): google.cloud.discoveryengine.v1.CloudSqlSource;
+                    public static create(properties?: google.cloud.discoveryengine.v1.IAlloyDbSource): google.cloud.discoveryengine.v1.AlloyDbSource;
 
                     /**
-                     * Encodes the specified CloudSqlSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.CloudSqlSource.verify|verify} messages.
-                     * @param message CloudSqlSource message or plain object to encode
+                     * Encodes the specified AlloyDbSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.AlloyDbSource.verify|verify} messages.
+                     * @param message AlloyDbSource message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.ICloudSqlSource, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.IAlloyDbSource, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified CloudSqlSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.CloudSqlSource.verify|verify} messages.
-                     * @param message CloudSqlSource message or plain object to encode
+                     * Encodes the specified AlloyDbSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.AlloyDbSource.verify|verify} messages.
+                     * @param message AlloyDbSource message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.ICloudSqlSource, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IAlloyDbSource, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes a CloudSqlSource message from the specified reader or buffer.
+                     * Decodes an AlloyDbSource message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns CloudSqlSource
+                     * @returns AlloyDbSource
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.CloudSqlSource;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.AlloyDbSource;
 
                     /**
-                     * Decodes a CloudSqlSource message from the specified reader or buffer, length delimited.
+                     * Decodes an AlloyDbSource message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns CloudSqlSource
+                     * @returns AlloyDbSource
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.CloudSqlSource;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.AlloyDbSource;
 
                     /**
-                     * Verifies a CloudSqlSource message.
+                     * Verifies an AlloyDbSource message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates a CloudSqlSource message from a plain object. Also converts values to their respective internal types.
+                     * Creates an AlloyDbSource message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns CloudSqlSource
+                     * @returns AlloyDbSource
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.CloudSqlSource;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.AlloyDbSource;
 
                     /**
-                     * Creates a plain object from a CloudSqlSource message. Also converts values to other types if specified.
-                     * @param message CloudSqlSource
+                     * Creates a plain object from an AlloyDbSource message. Also converts values to other types if specified.
+                     * @param message AlloyDbSource
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.CloudSqlSource, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.AlloyDbSource, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this CloudSqlSource to JSON.
+                     * Converts this AlloyDbSource to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for CloudSqlSource
+                     * Gets the default type url for AlloyDbSource
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
@@ -4343,557 +5115,885 @@ export namespace google {
                          */
                         public static toObject(message: google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
-                        /**
-                         * Converts this InlineSource to JSON.
-                         * @returns JSON object
-                         */
-                        public toJSON(): { [k: string]: any };
+                        /**
+                         * Converts this InlineSource to JSON.
+                         * @returns JSON object
+                         */
+                        public toJSON(): { [k: string]: any };
+
+                        /**
+                         * Gets the default type url for InlineSource
+                         * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns The default type url
+                         */
+                        public static getTypeUrl(typeUrlPrefix?: string): string;
+                    }
+                }
+
+                /** Properties of an ImportUserEventsResponse. */
+                interface IImportUserEventsResponse {
+
+                    /** ImportUserEventsResponse errorSamples */
+                    errorSamples?: (google.rpc.IStatus[]|null);
+
+                    /** ImportUserEventsResponse errorConfig */
+                    errorConfig?: (google.cloud.discoveryengine.v1.IImportErrorConfig|null);
+
+                    /** ImportUserEventsResponse joinedEventsCount */
+                    joinedEventsCount?: (number|Long|string|null);
+
+                    /** ImportUserEventsResponse unjoinedEventsCount */
+                    unjoinedEventsCount?: (number|Long|string|null);
+                }
+
+                /** Represents an ImportUserEventsResponse. */
+                class ImportUserEventsResponse implements IImportUserEventsResponse {
+
+                    /**
+                     * Constructs a new ImportUserEventsResponse.
+                     * @param [properties] Properties to set
+                     */
+                    constructor(properties?: google.cloud.discoveryengine.v1.IImportUserEventsResponse);
+
+                    /** ImportUserEventsResponse errorSamples. */
+                    public errorSamples: google.rpc.IStatus[];
+
+                    /** ImportUserEventsResponse errorConfig. */
+                    public errorConfig?: (google.cloud.discoveryengine.v1.IImportErrorConfig|null);
+
+                    /** ImportUserEventsResponse joinedEventsCount. */
+                    public joinedEventsCount: (number|Long|string);
+
+                    /** ImportUserEventsResponse unjoinedEventsCount. */
+                    public unjoinedEventsCount: (number|Long|string);
+
+                    /**
+                     * Creates a new ImportUserEventsResponse instance using the specified properties.
+                     * @param [properties] Properties to set
+                     * @returns ImportUserEventsResponse instance
+                     */
+                    public static create(properties?: google.cloud.discoveryengine.v1.IImportUserEventsResponse): google.cloud.discoveryengine.v1.ImportUserEventsResponse;
+
+                    /**
+                     * Encodes the specified ImportUserEventsResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsResponse.verify|verify} messages.
+                     * @param message ImportUserEventsResponse message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encode(message: google.cloud.discoveryengine.v1.IImportUserEventsResponse, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                    /**
+                     * Encodes the specified ImportUserEventsResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsResponse.verify|verify} messages.
+                     * @param message ImportUserEventsResponse message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IImportUserEventsResponse, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                    /**
+                     * Decodes an ImportUserEventsResponse message from the specified reader or buffer.
+                     * @param reader Reader or buffer to decode from
+                     * @param [length] Message length if known beforehand
+                     * @returns ImportUserEventsResponse
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportUserEventsResponse;
+
+                    /**
+                     * Decodes an ImportUserEventsResponse message from the specified reader or buffer, length delimited.
+                     * @param reader Reader or buffer to decode from
+                     * @returns ImportUserEventsResponse
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportUserEventsResponse;
+
+                    /**
+                     * Verifies an ImportUserEventsResponse message.
+                     * @param message Plain object to verify
+                     * @returns `null` if valid, otherwise the reason why it is not
+                     */
+                    public static verify(message: { [k: string]: any }): (string|null);
+
+                    /**
+                     * Creates an ImportUserEventsResponse message from a plain object. Also converts values to their respective internal types.
+                     * @param object Plain object
+                     * @returns ImportUserEventsResponse
+                     */
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportUserEventsResponse;
+
+                    /**
+                     * Creates a plain object from an ImportUserEventsResponse message. Also converts values to other types if specified.
+                     * @param message ImportUserEventsResponse
+                     * @param [options] Conversion options
+                     * @returns Plain object
+                     */
+                    public static toObject(message: google.cloud.discoveryengine.v1.ImportUserEventsResponse, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                    /**
+                     * Converts this ImportUserEventsResponse to JSON.
+                     * @returns JSON object
+                     */
+                    public toJSON(): { [k: string]: any };
+
+                    /**
+                     * Gets the default type url for ImportUserEventsResponse
+                     * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                     * @returns The default type url
+                     */
+                    public static getTypeUrl(typeUrlPrefix?: string): string;
+                }
+
+                /** Properties of an ImportUserEventsMetadata. */
+                interface IImportUserEventsMetadata {
+
+                    /** ImportUserEventsMetadata createTime */
+                    createTime?: (google.protobuf.ITimestamp|null);
+
+                    /** ImportUserEventsMetadata updateTime */
+                    updateTime?: (google.protobuf.ITimestamp|null);
+
+                    /** ImportUserEventsMetadata successCount */
+                    successCount?: (number|Long|string|null);
+
+                    /** ImportUserEventsMetadata failureCount */
+                    failureCount?: (number|Long|string|null);
+                }
+
+                /** Represents an ImportUserEventsMetadata. */
+                class ImportUserEventsMetadata implements IImportUserEventsMetadata {
+
+                    /**
+                     * Constructs a new ImportUserEventsMetadata.
+                     * @param [properties] Properties to set
+                     */
+                    constructor(properties?: google.cloud.discoveryengine.v1.IImportUserEventsMetadata);
+
+                    /** ImportUserEventsMetadata createTime. */
+                    public createTime?: (google.protobuf.ITimestamp|null);
+
+                    /** ImportUserEventsMetadata updateTime. */
+                    public updateTime?: (google.protobuf.ITimestamp|null);
+
+                    /** ImportUserEventsMetadata successCount. */
+                    public successCount: (number|Long|string);
+
+                    /** ImportUserEventsMetadata failureCount. */
+                    public failureCount: (number|Long|string);
+
+                    /**
+                     * Creates a new ImportUserEventsMetadata instance using the specified properties.
+                     * @param [properties] Properties to set
+                     * @returns ImportUserEventsMetadata instance
+                     */
+                    public static create(properties?: google.cloud.discoveryengine.v1.IImportUserEventsMetadata): google.cloud.discoveryengine.v1.ImportUserEventsMetadata;
+
+                    /**
+                     * Encodes the specified ImportUserEventsMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsMetadata.verify|verify} messages.
+                     * @param message ImportUserEventsMetadata message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encode(message: google.cloud.discoveryengine.v1.IImportUserEventsMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                    /**
+                     * Encodes the specified ImportUserEventsMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsMetadata.verify|verify} messages.
+                     * @param message ImportUserEventsMetadata message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IImportUserEventsMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                    /**
+                     * Decodes an ImportUserEventsMetadata message from the specified reader or buffer.
+                     * @param reader Reader or buffer to decode from
+                     * @param [length] Message length if known beforehand
+                     * @returns ImportUserEventsMetadata
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportUserEventsMetadata;
+
+                    /**
+                     * Decodes an ImportUserEventsMetadata message from the specified reader or buffer, length delimited.
+                     * @param reader Reader or buffer to decode from
+                     * @returns ImportUserEventsMetadata
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportUserEventsMetadata;
+
+                    /**
+                     * Verifies an ImportUserEventsMetadata message.
+                     * @param message Plain object to verify
+                     * @returns `null` if valid, otherwise the reason why it is not
+                     */
+                    public static verify(message: { [k: string]: any }): (string|null);
+
+                    /**
+                     * Creates an ImportUserEventsMetadata message from a plain object. Also converts values to their respective internal types.
+                     * @param object Plain object
+                     * @returns ImportUserEventsMetadata
+                     */
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportUserEventsMetadata;
+
+                    /**
+                     * Creates a plain object from an ImportUserEventsMetadata message. Also converts values to other types if specified.
+                     * @param message ImportUserEventsMetadata
+                     * @param [options] Conversion options
+                     * @returns Plain object
+                     */
+                    public static toObject(message: google.cloud.discoveryengine.v1.ImportUserEventsMetadata, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                    /**
+                     * Converts this ImportUserEventsMetadata to JSON.
+                     * @returns JSON object
+                     */
+                    public toJSON(): { [k: string]: any };
 
-                        /**
-                         * Gets the default type url for InlineSource
-                         * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                         * @returns The default type url
-                         */
-                        public static getTypeUrl(typeUrlPrefix?: string): string;
-                    }
+                    /**
+                     * Gets the default type url for ImportUserEventsMetadata
+                     * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                     * @returns The default type url
+                     */
+                    public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                /** Properties of an ImportUserEventsResponse. */
-                interface IImportUserEventsResponse {
+                /** Properties of an ImportDocumentsMetadata. */
+                interface IImportDocumentsMetadata {
 
-                    /** ImportUserEventsResponse errorSamples */
-                    errorSamples?: (google.rpc.IStatus[]|null);
+                    /** ImportDocumentsMetadata createTime */
+                    createTime?: (google.protobuf.ITimestamp|null);
 
-                    /** ImportUserEventsResponse errorConfig */
-                    errorConfig?: (google.cloud.discoveryengine.v1.IImportErrorConfig|null);
+                    /** ImportDocumentsMetadata updateTime */
+                    updateTime?: (google.protobuf.ITimestamp|null);
 
-                    /** ImportUserEventsResponse joinedEventsCount */
-                    joinedEventsCount?: (number|Long|string|null);
+                    /** ImportDocumentsMetadata successCount */
+                    successCount?: (number|Long|string|null);
 
-                    /** ImportUserEventsResponse unjoinedEventsCount */
-                    unjoinedEventsCount?: (number|Long|string|null);
+                    /** ImportDocumentsMetadata failureCount */
+                    failureCount?: (number|Long|string|null);
+
+                    /** ImportDocumentsMetadata totalCount */
+                    totalCount?: (number|Long|string|null);
                 }
 
-                /** Represents an ImportUserEventsResponse. */
-                class ImportUserEventsResponse implements IImportUserEventsResponse {
+                /** Represents an ImportDocumentsMetadata. */
+                class ImportDocumentsMetadata implements IImportDocumentsMetadata {
 
                     /**
-                     * Constructs a new ImportUserEventsResponse.
+                     * Constructs a new ImportDocumentsMetadata.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.cloud.discoveryengine.v1.IImportUserEventsResponse);
+                    constructor(properties?: google.cloud.discoveryengine.v1.IImportDocumentsMetadata);
 
-                    /** ImportUserEventsResponse errorSamples. */
-                    public errorSamples: google.rpc.IStatus[];
+                    /** ImportDocumentsMetadata createTime. */
+                    public createTime?: (google.protobuf.ITimestamp|null);
 
-                    /** ImportUserEventsResponse errorConfig. */
-                    public errorConfig?: (google.cloud.discoveryengine.v1.IImportErrorConfig|null);
+                    /** ImportDocumentsMetadata updateTime. */
+                    public updateTime?: (google.protobuf.ITimestamp|null);
 
-                    /** ImportUserEventsResponse joinedEventsCount. */
-                    public joinedEventsCount: (number|Long|string);
+                    /** ImportDocumentsMetadata successCount. */
+                    public successCount: (number|Long|string);
 
-                    /** ImportUserEventsResponse unjoinedEventsCount. */
-                    public unjoinedEventsCount: (number|Long|string);
+                    /** ImportDocumentsMetadata failureCount. */
+                    public failureCount: (number|Long|string);
+
+                    /** ImportDocumentsMetadata totalCount. */
+                    public totalCount: (number|Long|string);
 
                     /**
-                     * Creates a new ImportUserEventsResponse instance using the specified properties.
+                     * Creates a new ImportDocumentsMetadata instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns ImportUserEventsResponse instance
+                     * @returns ImportDocumentsMetadata instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.IImportUserEventsResponse): google.cloud.discoveryengine.v1.ImportUserEventsResponse;
+                    public static create(properties?: google.cloud.discoveryengine.v1.IImportDocumentsMetadata): google.cloud.discoveryengine.v1.ImportDocumentsMetadata;
 
                     /**
-                     * Encodes the specified ImportUserEventsResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsResponse.verify|verify} messages.
-                     * @param message ImportUserEventsResponse message or plain object to encode
+                     * Encodes the specified ImportDocumentsMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsMetadata.verify|verify} messages.
+                     * @param message ImportDocumentsMetadata message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.IImportUserEventsResponse, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.IImportDocumentsMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified ImportUserEventsResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsResponse.verify|verify} messages.
-                     * @param message ImportUserEventsResponse message or plain object to encode
+                     * Encodes the specified ImportDocumentsMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsMetadata.verify|verify} messages.
+                     * @param message ImportDocumentsMetadata message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IImportUserEventsResponse, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IImportDocumentsMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes an ImportUserEventsResponse message from the specified reader or buffer.
+                     * Decodes an ImportDocumentsMetadata message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns ImportUserEventsResponse
+                     * @returns ImportDocumentsMetadata
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportUserEventsResponse;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportDocumentsMetadata;
 
                     /**
-                     * Decodes an ImportUserEventsResponse message from the specified reader or buffer, length delimited.
+                     * Decodes an ImportDocumentsMetadata message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns ImportUserEventsResponse
+                     * @returns ImportDocumentsMetadata
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportUserEventsResponse;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportDocumentsMetadata;
 
                     /**
-                     * Verifies an ImportUserEventsResponse message.
+                     * Verifies an ImportDocumentsMetadata message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates an ImportUserEventsResponse message from a plain object. Also converts values to their respective internal types.
+                     * Creates an ImportDocumentsMetadata message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns ImportUserEventsResponse
+                     * @returns ImportDocumentsMetadata
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportUserEventsResponse;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportDocumentsMetadata;
 
                     /**
-                     * Creates a plain object from an ImportUserEventsResponse message. Also converts values to other types if specified.
-                     * @param message ImportUserEventsResponse
+                     * Creates a plain object from an ImportDocumentsMetadata message. Also converts values to other types if specified.
+                     * @param message ImportDocumentsMetadata
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.ImportUserEventsResponse, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.ImportDocumentsMetadata, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this ImportUserEventsResponse to JSON.
+                     * Converts this ImportDocumentsMetadata to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for ImportUserEventsResponse
+                     * Gets the default type url for ImportDocumentsMetadata
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                /** Properties of an ImportUserEventsMetadata. */
-                interface IImportUserEventsMetadata {
+                /** Properties of an ImportDocumentsRequest. */
+                interface IImportDocumentsRequest {
 
-                    /** ImportUserEventsMetadata createTime */
-                    createTime?: (google.protobuf.ITimestamp|null);
+                    /** ImportDocumentsRequest inlineSource */
+                    inlineSource?: (google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource|null);
 
-                    /** ImportUserEventsMetadata updateTime */
-                    updateTime?: (google.protobuf.ITimestamp|null);
+                    /** ImportDocumentsRequest gcsSource */
+                    gcsSource?: (google.cloud.discoveryengine.v1.IGcsSource|null);
 
-                    /** ImportUserEventsMetadata successCount */
-                    successCount?: (number|Long|string|null);
+                    /** ImportDocumentsRequest bigquerySource */
+                    bigquerySource?: (google.cloud.discoveryengine.v1.IBigQuerySource|null);
 
-                    /** ImportUserEventsMetadata failureCount */
-                    failureCount?: (number|Long|string|null);
+                    /** ImportDocumentsRequest fhirStoreSource */
+                    fhirStoreSource?: (google.cloud.discoveryengine.v1.IFhirStoreSource|null);
+
+                    /** ImportDocumentsRequest spannerSource */
+                    spannerSource?: (google.cloud.discoveryengine.v1.ISpannerSource|null);
+
+                    /** ImportDocumentsRequest cloudSqlSource */
+                    cloudSqlSource?: (google.cloud.discoveryengine.v1.ICloudSqlSource|null);
+
+                    /** ImportDocumentsRequest firestoreSource */
+                    firestoreSource?: (google.cloud.discoveryengine.v1.IFirestoreSource|null);
+
+                    /** ImportDocumentsRequest alloyDbSource */
+                    alloyDbSource?: (google.cloud.discoveryengine.v1.IAlloyDbSource|null);
+
+                    /** ImportDocumentsRequest bigtableSource */
+                    bigtableSource?: (google.cloud.discoveryengine.v1.IBigtableSource|null);
+
+                    /** ImportDocumentsRequest parent */
+                    parent?: (string|null);
+
+                    /** ImportDocumentsRequest errorConfig */
+                    errorConfig?: (google.cloud.discoveryengine.v1.IImportErrorConfig|null);
+
+                    /** ImportDocumentsRequest reconciliationMode */
+                    reconciliationMode?: (google.cloud.discoveryengine.v1.ImportDocumentsRequest.ReconciliationMode|keyof typeof google.cloud.discoveryengine.v1.ImportDocumentsRequest.ReconciliationMode|null);
+
+                    /** ImportDocumentsRequest updateMask */
+                    updateMask?: (google.protobuf.IFieldMask|null);
+
+                    /** ImportDocumentsRequest autoGenerateIds */
+                    autoGenerateIds?: (boolean|null);
+
+                    /** ImportDocumentsRequest idField */
+                    idField?: (string|null);
                 }
 
-                /** Represents an ImportUserEventsMetadata. */
-                class ImportUserEventsMetadata implements IImportUserEventsMetadata {
+                /** Represents an ImportDocumentsRequest. */
+                class ImportDocumentsRequest implements IImportDocumentsRequest {
 
                     /**
-                     * Constructs a new ImportUserEventsMetadata.
+                     * Constructs a new ImportDocumentsRequest.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.cloud.discoveryengine.v1.IImportUserEventsMetadata);
+                    constructor(properties?: google.cloud.discoveryengine.v1.IImportDocumentsRequest);
 
-                    /** ImportUserEventsMetadata createTime. */
-                    public createTime?: (google.protobuf.ITimestamp|null);
+                    /** ImportDocumentsRequest inlineSource. */
+                    public inlineSource?: (google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource|null);
 
-                    /** ImportUserEventsMetadata updateTime. */
-                    public updateTime?: (google.protobuf.ITimestamp|null);
+                    /** ImportDocumentsRequest gcsSource. */
+                    public gcsSource?: (google.cloud.discoveryengine.v1.IGcsSource|null);
 
-                    /** ImportUserEventsMetadata successCount. */
-                    public successCount: (number|Long|string);
+                    /** ImportDocumentsRequest bigquerySource. */
+                    public bigquerySource?: (google.cloud.discoveryengine.v1.IBigQuerySource|null);
 
-                    /** ImportUserEventsMetadata failureCount. */
-                    public failureCount: (number|Long|string);
+                    /** ImportDocumentsRequest fhirStoreSource. */
+                    public fhirStoreSource?: (google.cloud.discoveryengine.v1.IFhirStoreSource|null);
+
+                    /** ImportDocumentsRequest spannerSource. */
+                    public spannerSource?: (google.cloud.discoveryengine.v1.ISpannerSource|null);
+
+                    /** ImportDocumentsRequest cloudSqlSource. */
+                    public cloudSqlSource?: (google.cloud.discoveryengine.v1.ICloudSqlSource|null);
+
+                    /** ImportDocumentsRequest firestoreSource. */
+                    public firestoreSource?: (google.cloud.discoveryengine.v1.IFirestoreSource|null);
+
+                    /** ImportDocumentsRequest alloyDbSource. */
+                    public alloyDbSource?: (google.cloud.discoveryengine.v1.IAlloyDbSource|null);
+
+                    /** ImportDocumentsRequest bigtableSource. */
+                    public bigtableSource?: (google.cloud.discoveryengine.v1.IBigtableSource|null);
+
+                    /** ImportDocumentsRequest parent. */
+                    public parent: string;
+
+                    /** ImportDocumentsRequest errorConfig. */
+                    public errorConfig?: (google.cloud.discoveryengine.v1.IImportErrorConfig|null);
+
+                    /** ImportDocumentsRequest reconciliationMode. */
+                    public reconciliationMode: (google.cloud.discoveryengine.v1.ImportDocumentsRequest.ReconciliationMode|keyof typeof google.cloud.discoveryengine.v1.ImportDocumentsRequest.ReconciliationMode);
+
+                    /** ImportDocumentsRequest updateMask. */
+                    public updateMask?: (google.protobuf.IFieldMask|null);
+
+                    /** ImportDocumentsRequest autoGenerateIds. */
+                    public autoGenerateIds: boolean;
+
+                    /** ImportDocumentsRequest idField. */
+                    public idField: string;
+
+                    /** ImportDocumentsRequest source. */
+                    public source?: ("inlineSource"|"gcsSource"|"bigquerySource"|"fhirStoreSource"|"spannerSource"|"cloudSqlSource"|"firestoreSource"|"alloyDbSource"|"bigtableSource");
 
                     /**
-                     * Creates a new ImportUserEventsMetadata instance using the specified properties.
+                     * Creates a new ImportDocumentsRequest instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns ImportUserEventsMetadata instance
+                     * @returns ImportDocumentsRequest instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.IImportUserEventsMetadata): google.cloud.discoveryengine.v1.ImportUserEventsMetadata;
+                    public static create(properties?: google.cloud.discoveryengine.v1.IImportDocumentsRequest): google.cloud.discoveryengine.v1.ImportDocumentsRequest;
 
                     /**
-                     * Encodes the specified ImportUserEventsMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsMetadata.verify|verify} messages.
-                     * @param message ImportUserEventsMetadata message or plain object to encode
+                     * Encodes the specified ImportDocumentsRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsRequest.verify|verify} messages.
+                     * @param message ImportDocumentsRequest message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.IImportUserEventsMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.IImportDocumentsRequest, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified ImportUserEventsMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsMetadata.verify|verify} messages.
-                     * @param message ImportUserEventsMetadata message or plain object to encode
+                     * Encodes the specified ImportDocumentsRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsRequest.verify|verify} messages.
+                     * @param message ImportDocumentsRequest message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IImportUserEventsMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IImportDocumentsRequest, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes an ImportUserEventsMetadata message from the specified reader or buffer.
+                     * Decodes an ImportDocumentsRequest message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns ImportUserEventsMetadata
+                     * @returns ImportDocumentsRequest
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportUserEventsMetadata;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportDocumentsRequest;
 
                     /**
-                     * Decodes an ImportUserEventsMetadata message from the specified reader or buffer, length delimited.
+                     * Decodes an ImportDocumentsRequest message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns ImportUserEventsMetadata
+                     * @returns ImportDocumentsRequest
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportUserEventsMetadata;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportDocumentsRequest;
 
                     /**
-                     * Verifies an ImportUserEventsMetadata message.
+                     * Verifies an ImportDocumentsRequest message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates an ImportUserEventsMetadata message from a plain object. Also converts values to their respective internal types.
+                     * Creates an ImportDocumentsRequest message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns ImportUserEventsMetadata
+                     * @returns ImportDocumentsRequest
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportUserEventsMetadata;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportDocumentsRequest;
 
                     /**
-                     * Creates a plain object from an ImportUserEventsMetadata message. Also converts values to other types if specified.
-                     * @param message ImportUserEventsMetadata
+                     * Creates a plain object from an ImportDocumentsRequest message. Also converts values to other types if specified.
+                     * @param message ImportDocumentsRequest
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.ImportUserEventsMetadata, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.ImportDocumentsRequest, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this ImportUserEventsMetadata to JSON.
+                     * Converts this ImportDocumentsRequest to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for ImportUserEventsMetadata
+                     * Gets the default type url for ImportDocumentsRequest
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                /** Properties of an ImportDocumentsMetadata. */
-                interface IImportDocumentsMetadata {
+                namespace ImportDocumentsRequest {
 
-                    /** ImportDocumentsMetadata createTime */
-                    createTime?: (google.protobuf.ITimestamp|null);
+                    /** Properties of an InlineSource. */
+                    interface IInlineSource {
 
-                    /** ImportDocumentsMetadata updateTime */
-                    updateTime?: (google.protobuf.ITimestamp|null);
+                        /** InlineSource documents */
+                        documents?: (google.cloud.discoveryengine.v1.IDocument[]|null);
+                    }
 
-                    /** ImportDocumentsMetadata successCount */
-                    successCount?: (number|Long|string|null);
+                    /** Represents an InlineSource. */
+                    class InlineSource implements IInlineSource {
 
-                    /** ImportDocumentsMetadata failureCount */
-                    failureCount?: (number|Long|string|null);
+                        /**
+                         * Constructs a new InlineSource.
+                         * @param [properties] Properties to set
+                         */
+                        constructor(properties?: google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource);
 
-                    /** ImportDocumentsMetadata totalCount */
-                    totalCount?: (number|Long|string|null);
+                        /** InlineSource documents. */
+                        public documents: google.cloud.discoveryengine.v1.IDocument[];
+
+                        /**
+                         * Creates a new InlineSource instance using the specified properties.
+                         * @param [properties] Properties to set
+                         * @returns InlineSource instance
+                         */
+                        public static create(properties?: google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource): google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource;
+
+                        /**
+                         * Encodes the specified InlineSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource.verify|verify} messages.
+                         * @param message InlineSource message or plain object to encode
+                         * @param [writer] Writer to encode to
+                         * @returns Writer
+                         */
+                        public static encode(message: google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                        /**
+                         * Encodes the specified InlineSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource.verify|verify} messages.
+                         * @param message InlineSource message or plain object to encode
+                         * @param [writer] Writer to encode to
+                         * @returns Writer
+                         */
+                        public static encodeDelimited(message: google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                        /**
+                         * Decodes an InlineSource message from the specified reader or buffer.
+                         * @param reader Reader or buffer to decode from
+                         * @param [length] Message length if known beforehand
+                         * @returns InlineSource
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource;
+
+                        /**
+                         * Decodes an InlineSource message from the specified reader or buffer, length delimited.
+                         * @param reader Reader or buffer to decode from
+                         * @returns InlineSource
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource;
+
+                        /**
+                         * Verifies an InlineSource message.
+                         * @param message Plain object to verify
+                         * @returns `null` if valid, otherwise the reason why it is not
+                         */
+                        public static verify(message: { [k: string]: any }): (string|null);
+
+                        /**
+                         * Creates an InlineSource message from a plain object. Also converts values to their respective internal types.
+                         * @param object Plain object
+                         * @returns InlineSource
+                         */
+                        public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource;
+
+                        /**
+                         * Creates a plain object from an InlineSource message. Also converts values to other types if specified.
+                         * @param message InlineSource
+                         * @param [options] Conversion options
+                         * @returns Plain object
+                         */
+                        public static toObject(message: google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                        /**
+                         * Converts this InlineSource to JSON.
+                         * @returns JSON object
+                         */
+                        public toJSON(): { [k: string]: any };
+
+                        /**
+                         * Gets the default type url for InlineSource
+                         * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns The default type url
+                         */
+                        public static getTypeUrl(typeUrlPrefix?: string): string;
+                    }
+
+                    /** ReconciliationMode enum. */
+                    enum ReconciliationMode {
+                        RECONCILIATION_MODE_UNSPECIFIED = 0,
+                        INCREMENTAL = 1,
+                        FULL = 2
+                    }
                 }
 
-                /** Represents an ImportDocumentsMetadata. */
-                class ImportDocumentsMetadata implements IImportDocumentsMetadata {
+                /** Properties of an ImportDocumentsResponse. */
+                interface IImportDocumentsResponse {
 
-                    /**
-                     * Constructs a new ImportDocumentsMetadata.
-                     * @param [properties] Properties to set
-                     */
-                    constructor(properties?: google.cloud.discoveryengine.v1.IImportDocumentsMetadata);
+                    /** ImportDocumentsResponse errorSamples */
+                    errorSamples?: (google.rpc.IStatus[]|null);
 
-                    /** ImportDocumentsMetadata createTime. */
-                    public createTime?: (google.protobuf.ITimestamp|null);
+                    /** ImportDocumentsResponse errorConfig */
+                    errorConfig?: (google.cloud.discoveryengine.v1.IImportErrorConfig|null);
+                }
 
-                    /** ImportDocumentsMetadata updateTime. */
-                    public updateTime?: (google.protobuf.ITimestamp|null);
+                /** Represents an ImportDocumentsResponse. */
+                class ImportDocumentsResponse implements IImportDocumentsResponse {
 
-                    /** ImportDocumentsMetadata successCount. */
-                    public successCount: (number|Long|string);
+                    /**
+                     * Constructs a new ImportDocumentsResponse.
+                     * @param [properties] Properties to set
+                     */
+                    constructor(properties?: google.cloud.discoveryengine.v1.IImportDocumentsResponse);
 
-                    /** ImportDocumentsMetadata failureCount. */
-                    public failureCount: (number|Long|string);
+                    /** ImportDocumentsResponse errorSamples. */
+                    public errorSamples: google.rpc.IStatus[];
 
-                    /** ImportDocumentsMetadata totalCount. */
-                    public totalCount: (number|Long|string);
+                    /** ImportDocumentsResponse errorConfig. */
+                    public errorConfig?: (google.cloud.discoveryengine.v1.IImportErrorConfig|null);
 
                     /**
-                     * Creates a new ImportDocumentsMetadata instance using the specified properties.
+                     * Creates a new ImportDocumentsResponse instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns ImportDocumentsMetadata instance
+                     * @returns ImportDocumentsResponse instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.IImportDocumentsMetadata): google.cloud.discoveryengine.v1.ImportDocumentsMetadata;
+                    public static create(properties?: google.cloud.discoveryengine.v1.IImportDocumentsResponse): google.cloud.discoveryengine.v1.ImportDocumentsResponse;
 
                     /**
-                     * Encodes the specified ImportDocumentsMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsMetadata.verify|verify} messages.
-                     * @param message ImportDocumentsMetadata message or plain object to encode
+                     * Encodes the specified ImportDocumentsResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsResponse.verify|verify} messages.
+                     * @param message ImportDocumentsResponse message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.IImportDocumentsMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.IImportDocumentsResponse, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified ImportDocumentsMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsMetadata.verify|verify} messages.
-                     * @param message ImportDocumentsMetadata message or plain object to encode
+                     * Encodes the specified ImportDocumentsResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsResponse.verify|verify} messages.
+                     * @param message ImportDocumentsResponse message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IImportDocumentsMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IImportDocumentsResponse, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes an ImportDocumentsMetadata message from the specified reader or buffer.
+                     * Decodes an ImportDocumentsResponse message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns ImportDocumentsMetadata
+                     * @returns ImportDocumentsResponse
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportDocumentsMetadata;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportDocumentsResponse;
 
                     /**
-                     * Decodes an ImportDocumentsMetadata message from the specified reader or buffer, length delimited.
+                     * Decodes an ImportDocumentsResponse message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns ImportDocumentsMetadata
+                     * @returns ImportDocumentsResponse
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportDocumentsMetadata;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportDocumentsResponse;
 
                     /**
-                     * Verifies an ImportDocumentsMetadata message.
+                     * Verifies an ImportDocumentsResponse message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates an ImportDocumentsMetadata message from a plain object. Also converts values to their respective internal types.
+                     * Creates an ImportDocumentsResponse message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns ImportDocumentsMetadata
+                     * @returns ImportDocumentsResponse
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportDocumentsMetadata;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportDocumentsResponse;
 
                     /**
-                     * Creates a plain object from an ImportDocumentsMetadata message. Also converts values to other types if specified.
-                     * @param message ImportDocumentsMetadata
+                     * Creates a plain object from an ImportDocumentsResponse message. Also converts values to other types if specified.
+                     * @param message ImportDocumentsResponse
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.ImportDocumentsMetadata, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.ImportDocumentsResponse, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this ImportDocumentsMetadata to JSON.
+                     * Converts this ImportDocumentsResponse to JSON.
                      * @returns JSON object
-                     */
-                    public toJSON(): { [k: string]: any };
-
-                    /**
-                     * Gets the default type url for ImportDocumentsMetadata
-                     * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                     * @returns The default type url
-                     */
-                    public static getTypeUrl(typeUrlPrefix?: string): string;
-                }
-
-                /** Properties of an ImportDocumentsRequest. */
-                interface IImportDocumentsRequest {
-
-                    /** ImportDocumentsRequest inlineSource */
-                    inlineSource?: (google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource|null);
-
-                    /** ImportDocumentsRequest gcsSource */
-                    gcsSource?: (google.cloud.discoveryengine.v1.IGcsSource|null);
-
-                    /** ImportDocumentsRequest bigquerySource */
-                    bigquerySource?: (google.cloud.discoveryengine.v1.IBigQuerySource|null);
-
-                    /** ImportDocumentsRequest fhirStoreSource */
-                    fhirStoreSource?: (google.cloud.discoveryengine.v1.IFhirStoreSource|null);
-
-                    /** ImportDocumentsRequest spannerSource */
-                    spannerSource?: (google.cloud.discoveryengine.v1.ISpannerSource|null);
-
-                    /** ImportDocumentsRequest cloudSqlSource */
-                    cloudSqlSource?: (google.cloud.discoveryengine.v1.ICloudSqlSource|null);
-
-                    /** ImportDocumentsRequest firestoreSource */
-                    firestoreSource?: (google.cloud.discoveryengine.v1.IFirestoreSource|null);
-
-                    /** ImportDocumentsRequest bigtableSource */
-                    bigtableSource?: (google.cloud.discoveryengine.v1.IBigtableSource|null);
-
-                    /** ImportDocumentsRequest parent */
-                    parent?: (string|null);
+                     */
+                    public toJSON(): { [k: string]: any };
 
-                    /** ImportDocumentsRequest errorConfig */
-                    errorConfig?: (google.cloud.discoveryengine.v1.IImportErrorConfig|null);
+                    /**
+                     * Gets the default type url for ImportDocumentsResponse
+                     * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                     * @returns The default type url
+                     */
+                    public static getTypeUrl(typeUrlPrefix?: string): string;
+                }
 
-                    /** ImportDocumentsRequest reconciliationMode */
-                    reconciliationMode?: (google.cloud.discoveryengine.v1.ImportDocumentsRequest.ReconciliationMode|keyof typeof google.cloud.discoveryengine.v1.ImportDocumentsRequest.ReconciliationMode|null);
+                /** Properties of an ImportSuggestionDenyListEntriesRequest. */
+                interface IImportSuggestionDenyListEntriesRequest {
 
-                    /** ImportDocumentsRequest updateMask */
-                    updateMask?: (google.protobuf.IFieldMask|null);
+                    /** ImportSuggestionDenyListEntriesRequest inlineSource */
+                    inlineSource?: (google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource|null);
 
-                    /** ImportDocumentsRequest autoGenerateIds */
-                    autoGenerateIds?: (boolean|null);
+                    /** ImportSuggestionDenyListEntriesRequest gcsSource */
+                    gcsSource?: (google.cloud.discoveryengine.v1.IGcsSource|null);
 
-                    /** ImportDocumentsRequest idField */
-                    idField?: (string|null);
+                    /** ImportSuggestionDenyListEntriesRequest parent */
+                    parent?: (string|null);
                 }
 
-                /** Represents an ImportDocumentsRequest. */
-                class ImportDocumentsRequest implements IImportDocumentsRequest {
+                /** Represents an ImportSuggestionDenyListEntriesRequest. */
+                class ImportSuggestionDenyListEntriesRequest implements IImportSuggestionDenyListEntriesRequest {
 
                     /**
-                     * Constructs a new ImportDocumentsRequest.
+                     * Constructs a new ImportSuggestionDenyListEntriesRequest.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.cloud.discoveryengine.v1.IImportDocumentsRequest);
+                    constructor(properties?: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesRequest);
 
-                    /** ImportDocumentsRequest inlineSource. */
-                    public inlineSource?: (google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource|null);
+                    /** ImportSuggestionDenyListEntriesRequest inlineSource. */
+                    public inlineSource?: (google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource|null);
 
-                    /** ImportDocumentsRequest gcsSource. */
+                    /** ImportSuggestionDenyListEntriesRequest gcsSource. */
                     public gcsSource?: (google.cloud.discoveryengine.v1.IGcsSource|null);
 
-                    /** ImportDocumentsRequest bigquerySource. */
-                    public bigquerySource?: (google.cloud.discoveryengine.v1.IBigQuerySource|null);
-
-                    /** ImportDocumentsRequest fhirStoreSource. */
-                    public fhirStoreSource?: (google.cloud.discoveryengine.v1.IFhirStoreSource|null);
-
-                    /** ImportDocumentsRequest spannerSource. */
-                    public spannerSource?: (google.cloud.discoveryengine.v1.ISpannerSource|null);
-
-                    /** ImportDocumentsRequest cloudSqlSource. */
-                    public cloudSqlSource?: (google.cloud.discoveryengine.v1.ICloudSqlSource|null);
-
-                    /** ImportDocumentsRequest firestoreSource. */
-                    public firestoreSource?: (google.cloud.discoveryengine.v1.IFirestoreSource|null);
-
-                    /** ImportDocumentsRequest bigtableSource. */
-                    public bigtableSource?: (google.cloud.discoveryengine.v1.IBigtableSource|null);
-
-                    /** ImportDocumentsRequest parent. */
+                    /** ImportSuggestionDenyListEntriesRequest parent. */
                     public parent: string;
 
-                    /** ImportDocumentsRequest errorConfig. */
-                    public errorConfig?: (google.cloud.discoveryengine.v1.IImportErrorConfig|null);
-
-                    /** ImportDocumentsRequest reconciliationMode. */
-                    public reconciliationMode: (google.cloud.discoveryengine.v1.ImportDocumentsRequest.ReconciliationMode|keyof typeof google.cloud.discoveryengine.v1.ImportDocumentsRequest.ReconciliationMode);
-
-                    /** ImportDocumentsRequest updateMask. */
-                    public updateMask?: (google.protobuf.IFieldMask|null);
-
-                    /** ImportDocumentsRequest autoGenerateIds. */
-                    public autoGenerateIds: boolean;
-
-                    /** ImportDocumentsRequest idField. */
-                    public idField: string;
-
-                    /** ImportDocumentsRequest source. */
-                    public source?: ("inlineSource"|"gcsSource"|"bigquerySource"|"fhirStoreSource"|"spannerSource"|"cloudSqlSource"|"firestoreSource"|"bigtableSource");
+                    /** ImportSuggestionDenyListEntriesRequest source. */
+                    public source?: ("inlineSource"|"gcsSource");
 
                     /**
-                     * Creates a new ImportDocumentsRequest instance using the specified properties.
+                     * Creates a new ImportSuggestionDenyListEntriesRequest instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns ImportDocumentsRequest instance
+                     * @returns ImportSuggestionDenyListEntriesRequest instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.IImportDocumentsRequest): google.cloud.discoveryengine.v1.ImportDocumentsRequest;
+                    public static create(properties?: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesRequest): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest;
 
                     /**
-                     * Encodes the specified ImportDocumentsRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsRequest.verify|verify} messages.
-                     * @param message ImportDocumentsRequest message or plain object to encode
+                     * Encodes the specified ImportSuggestionDenyListEntriesRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.verify|verify} messages.
+                     * @param message ImportSuggestionDenyListEntriesRequest message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.IImportDocumentsRequest, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesRequest, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified ImportDocumentsRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsRequest.verify|verify} messages.
-                     * @param message ImportDocumentsRequest message or plain object to encode
+                     * Encodes the specified ImportSuggestionDenyListEntriesRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.verify|verify} messages.
+                     * @param message ImportSuggestionDenyListEntriesRequest message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IImportDocumentsRequest, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesRequest, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes an ImportDocumentsRequest message from the specified reader or buffer.
+                     * Decodes an ImportSuggestionDenyListEntriesRequest message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns ImportDocumentsRequest
+                     * @returns ImportSuggestionDenyListEntriesRequest
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportDocumentsRequest;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest;
 
                     /**
-                     * Decodes an ImportDocumentsRequest message from the specified reader or buffer, length delimited.
+                     * Decodes an ImportSuggestionDenyListEntriesRequest message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns ImportDocumentsRequest
+                     * @returns ImportSuggestionDenyListEntriesRequest
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportDocumentsRequest;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest;
 
                     /**
-                     * Verifies an ImportDocumentsRequest message.
+                     * Verifies an ImportSuggestionDenyListEntriesRequest message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates an ImportDocumentsRequest message from a plain object. Also converts values to their respective internal types.
+                     * Creates an ImportSuggestionDenyListEntriesRequest message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns ImportDocumentsRequest
+                     * @returns ImportSuggestionDenyListEntriesRequest
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportDocumentsRequest;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest;
 
                     /**
-                     * Creates a plain object from an ImportDocumentsRequest message. Also converts values to other types if specified.
-                     * @param message ImportDocumentsRequest
+                     * Creates a plain object from an ImportSuggestionDenyListEntriesRequest message. Also converts values to other types if specified.
+                     * @param message ImportSuggestionDenyListEntriesRequest
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.ImportDocumentsRequest, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this ImportDocumentsRequest to JSON.
+                     * Converts this ImportSuggestionDenyListEntriesRequest to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for ImportDocumentsRequest
+                     * Gets the default type url for ImportSuggestionDenyListEntriesRequest
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                namespace ImportDocumentsRequest {
+                namespace ImportSuggestionDenyListEntriesRequest {
 
                     /** Properties of an InlineSource. */
                     interface IInlineSource {
 
-                        /** InlineSource documents */
-                        documents?: (google.cloud.discoveryengine.v1.IDocument[]|null);
+                        /** InlineSource entries */
+                        entries?: (google.cloud.discoveryengine.v1.ISuggestionDenyListEntry[]|null);
                     }
 
                     /** Represents an InlineSource. */
@@ -4903,33 +6003,33 @@ export namespace google {
                          * Constructs a new InlineSource.
                          * @param [properties] Properties to set
                          */
-                        constructor(properties?: google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource);
+                        constructor(properties?: google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource);
 
-                        /** InlineSource documents. */
-                        public documents: google.cloud.discoveryengine.v1.IDocument[];
+                        /** InlineSource entries. */
+                        public entries: google.cloud.discoveryengine.v1.ISuggestionDenyListEntry[];
 
                         /**
                          * Creates a new InlineSource instance using the specified properties.
                          * @param [properties] Properties to set
                          * @returns InlineSource instance
                          */
-                        public static create(properties?: google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource): google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource;
+                        public static create(properties?: google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource;
 
                         /**
-                         * Encodes the specified InlineSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource.verify|verify} messages.
+                         * Encodes the specified InlineSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource.verify|verify} messages.
                          * @param message InlineSource message or plain object to encode
                          * @param [writer] Writer to encode to
                          * @returns Writer
                          */
-                        public static encode(message: google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource, writer?: $protobuf.Writer): $protobuf.Writer;
+                        public static encode(message: google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource, writer?: $protobuf.Writer): $protobuf.Writer;
 
                         /**
-                         * Encodes the specified InlineSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource.verify|verify} messages.
+                         * Encodes the specified InlineSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource.verify|verify} messages.
                          * @param message InlineSource message or plain object to encode
                          * @param [writer] Writer to encode to
                          * @returns Writer
                          */
-                        public static encodeDelimited(message: google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource, writer?: $protobuf.Writer): $protobuf.Writer;
+                        public static encodeDelimited(message: google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource, writer?: $protobuf.Writer): $protobuf.Writer;
 
                         /**
                          * Decodes an InlineSource message from the specified reader or buffer.
@@ -4939,7 +6039,7 @@ export namespace google {
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource;
+                        public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource;
 
                         /**
                          * Decodes an InlineSource message from the specified reader or buffer, length delimited.
@@ -4948,7 +6048,7 @@ export namespace google {
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource;
+                        public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource;
 
                         /**
                          * Verifies an InlineSource message.
@@ -4962,7 +6062,7 @@ export namespace google {
                          * @param object Plain object
                          * @returns InlineSource
                          */
-                        public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource;
+                        public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource;
 
                         /**
                          * Creates a plain object from an InlineSource message. Also converts values to other types if specified.
@@ -4970,252 +6070,366 @@ export namespace google {
                          * @param [options] Conversion options
                          * @returns Plain object
                          */
-                        public static toObject(message: google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                        public static toObject(message: google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                        /**
+                         * Converts this InlineSource to JSON.
+                         * @returns JSON object
+                         */
+                        public toJSON(): { [k: string]: any };
+
+                        /**
+                         * Gets the default type url for InlineSource
+                         * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns The default type url
+                         */
+                        public static getTypeUrl(typeUrlPrefix?: string): string;
+                    }
+                }
+
+                /** Properties of an ImportSuggestionDenyListEntriesResponse. */
+                interface IImportSuggestionDenyListEntriesResponse {
+
+                    /** ImportSuggestionDenyListEntriesResponse errorSamples */
+                    errorSamples?: (google.rpc.IStatus[]|null);
+
+                    /** ImportSuggestionDenyListEntriesResponse importedEntriesCount */
+                    importedEntriesCount?: (number|Long|string|null);
+
+                    /** ImportSuggestionDenyListEntriesResponse failedEntriesCount */
+                    failedEntriesCount?: (number|Long|string|null);
+                }
+
+                /** Represents an ImportSuggestionDenyListEntriesResponse. */
+                class ImportSuggestionDenyListEntriesResponse implements IImportSuggestionDenyListEntriesResponse {
+
+                    /**
+                     * Constructs a new ImportSuggestionDenyListEntriesResponse.
+                     * @param [properties] Properties to set
+                     */
+                    constructor(properties?: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesResponse);
+
+                    /** ImportSuggestionDenyListEntriesResponse errorSamples. */
+                    public errorSamples: google.rpc.IStatus[];
+
+                    /** ImportSuggestionDenyListEntriesResponse importedEntriesCount. */
+                    public importedEntriesCount: (number|Long|string);
+
+                    /** ImportSuggestionDenyListEntriesResponse failedEntriesCount. */
+                    public failedEntriesCount: (number|Long|string);
+
+                    /**
+                     * Creates a new ImportSuggestionDenyListEntriesResponse instance using the specified properties.
+                     * @param [properties] Properties to set
+                     * @returns ImportSuggestionDenyListEntriesResponse instance
+                     */
+                    public static create(properties?: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesResponse): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse;
+
+                    /**
+                     * Encodes the specified ImportSuggestionDenyListEntriesResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse.verify|verify} messages.
+                     * @param message ImportSuggestionDenyListEntriesResponse message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encode(message: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesResponse, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                    /**
+                     * Encodes the specified ImportSuggestionDenyListEntriesResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse.verify|verify} messages.
+                     * @param message ImportSuggestionDenyListEntriesResponse message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesResponse, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                    /**
+                     * Decodes an ImportSuggestionDenyListEntriesResponse message from the specified reader or buffer.
+                     * @param reader Reader or buffer to decode from
+                     * @param [length] Message length if known beforehand
+                     * @returns ImportSuggestionDenyListEntriesResponse
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse;
+
+                    /**
+                     * Decodes an ImportSuggestionDenyListEntriesResponse message from the specified reader or buffer, length delimited.
+                     * @param reader Reader or buffer to decode from
+                     * @returns ImportSuggestionDenyListEntriesResponse
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse;
+
+                    /**
+                     * Verifies an ImportSuggestionDenyListEntriesResponse message.
+                     * @param message Plain object to verify
+                     * @returns `null` if valid, otherwise the reason why it is not
+                     */
+                    public static verify(message: { [k: string]: any }): (string|null);
+
+                    /**
+                     * Creates an ImportSuggestionDenyListEntriesResponse message from a plain object. Also converts values to their respective internal types.
+                     * @param object Plain object
+                     * @returns ImportSuggestionDenyListEntriesResponse
+                     */
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse;
 
-                        /**
-                         * Converts this InlineSource to JSON.
-                         * @returns JSON object
-                         */
-                        public toJSON(): { [k: string]: any };
+                    /**
+                     * Creates a plain object from an ImportSuggestionDenyListEntriesResponse message. Also converts values to other types if specified.
+                     * @param message ImportSuggestionDenyListEntriesResponse
+                     * @param [options] Conversion options
+                     * @returns Plain object
+                     */
+                    public static toObject(message: google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
-                        /**
-                         * Gets the default type url for InlineSource
-                         * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                         * @returns The default type url
-                         */
-                        public static getTypeUrl(typeUrlPrefix?: string): string;
-                    }
+                    /**
+                     * Converts this ImportSuggestionDenyListEntriesResponse to JSON.
+                     * @returns JSON object
+                     */
+                    public toJSON(): { [k: string]: any };
 
-                    /** ReconciliationMode enum. */
-                    enum ReconciliationMode {
-                        RECONCILIATION_MODE_UNSPECIFIED = 0,
-                        INCREMENTAL = 1,
-                        FULL = 2
-                    }
+                    /**
+                     * Gets the default type url for ImportSuggestionDenyListEntriesResponse
+                     * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                     * @returns The default type url
+                     */
+                    public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                /** Properties of an ImportDocumentsResponse. */
-                interface IImportDocumentsResponse {
+                /** Properties of an ImportSuggestionDenyListEntriesMetadata. */
+                interface IImportSuggestionDenyListEntriesMetadata {
 
-                    /** ImportDocumentsResponse errorSamples */
-                    errorSamples?: (google.rpc.IStatus[]|null);
+                    /** ImportSuggestionDenyListEntriesMetadata createTime */
+                    createTime?: (google.protobuf.ITimestamp|null);
 
-                    /** ImportDocumentsResponse errorConfig */
-                    errorConfig?: (google.cloud.discoveryengine.v1.IImportErrorConfig|null);
+                    /** ImportSuggestionDenyListEntriesMetadata updateTime */
+                    updateTime?: (google.protobuf.ITimestamp|null);
                 }
 
-                /** Represents an ImportDocumentsResponse. */
-                class ImportDocumentsResponse implements IImportDocumentsResponse {
+                /** Represents an ImportSuggestionDenyListEntriesMetadata. */
+                class ImportSuggestionDenyListEntriesMetadata implements IImportSuggestionDenyListEntriesMetadata {
 
                     /**
-                     * Constructs a new ImportDocumentsResponse.
+                     * Constructs a new ImportSuggestionDenyListEntriesMetadata.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.cloud.discoveryengine.v1.IImportDocumentsResponse);
+                    constructor(properties?: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesMetadata);
 
-                    /** ImportDocumentsResponse errorSamples. */
-                    public errorSamples: google.rpc.IStatus[];
+                    /** ImportSuggestionDenyListEntriesMetadata createTime. */
+                    public createTime?: (google.protobuf.ITimestamp|null);
 
-                    /** ImportDocumentsResponse errorConfig. */
-                    public errorConfig?: (google.cloud.discoveryengine.v1.IImportErrorConfig|null);
+                    /** ImportSuggestionDenyListEntriesMetadata updateTime. */
+                    public updateTime?: (google.protobuf.ITimestamp|null);
 
                     /**
-                     * Creates a new ImportDocumentsResponse instance using the specified properties.
+                     * Creates a new ImportSuggestionDenyListEntriesMetadata instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns ImportDocumentsResponse instance
+                     * @returns ImportSuggestionDenyListEntriesMetadata instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.IImportDocumentsResponse): google.cloud.discoveryengine.v1.ImportDocumentsResponse;
+                    public static create(properties?: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesMetadata): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata;
 
                     /**
-                     * Encodes the specified ImportDocumentsResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsResponse.verify|verify} messages.
-                     * @param message ImportDocumentsResponse message or plain object to encode
+                     * Encodes the specified ImportSuggestionDenyListEntriesMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata.verify|verify} messages.
+                     * @param message ImportSuggestionDenyListEntriesMetadata message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.IImportDocumentsResponse, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified ImportDocumentsResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsResponse.verify|verify} messages.
-                     * @param message ImportDocumentsResponse message or plain object to encode
+                     * Encodes the specified ImportSuggestionDenyListEntriesMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata.verify|verify} messages.
+                     * @param message ImportSuggestionDenyListEntriesMetadata message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IImportDocumentsResponse, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes an ImportDocumentsResponse message from the specified reader or buffer.
+                     * Decodes an ImportSuggestionDenyListEntriesMetadata message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns ImportDocumentsResponse
+                     * @returns ImportSuggestionDenyListEntriesMetadata
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportDocumentsResponse;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata;
 
                     /**
-                     * Decodes an ImportDocumentsResponse message from the specified reader or buffer, length delimited.
+                     * Decodes an ImportSuggestionDenyListEntriesMetadata message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns ImportDocumentsResponse
+                     * @returns ImportSuggestionDenyListEntriesMetadata
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportDocumentsResponse;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata;
 
                     /**
-                     * Verifies an ImportDocumentsResponse message.
+                     * Verifies an ImportSuggestionDenyListEntriesMetadata message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates an ImportDocumentsResponse message from a plain object. Also converts values to their respective internal types.
+                     * Creates an ImportSuggestionDenyListEntriesMetadata message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns ImportDocumentsResponse
+                     * @returns ImportSuggestionDenyListEntriesMetadata
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportDocumentsResponse;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata;
 
                     /**
-                     * Creates a plain object from an ImportDocumentsResponse message. Also converts values to other types if specified.
-                     * @param message ImportDocumentsResponse
+                     * Creates a plain object from an ImportSuggestionDenyListEntriesMetadata message. Also converts values to other types if specified.
+                     * @param message ImportSuggestionDenyListEntriesMetadata
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.ImportDocumentsResponse, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this ImportDocumentsResponse to JSON.
+                     * Converts this ImportSuggestionDenyListEntriesMetadata to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for ImportDocumentsResponse
+                     * Gets the default type url for ImportSuggestionDenyListEntriesMetadata
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                /** Properties of an ImportSuggestionDenyListEntriesRequest. */
-                interface IImportSuggestionDenyListEntriesRequest {
+                /** Properties of an ImportCompletionSuggestionsRequest. */
+                interface IImportCompletionSuggestionsRequest {
 
-                    /** ImportSuggestionDenyListEntriesRequest inlineSource */
-                    inlineSource?: (google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource|null);
+                    /** ImportCompletionSuggestionsRequest inlineSource */
+                    inlineSource?: (google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.IInlineSource|null);
 
-                    /** ImportSuggestionDenyListEntriesRequest gcsSource */
+                    /** ImportCompletionSuggestionsRequest gcsSource */
                     gcsSource?: (google.cloud.discoveryengine.v1.IGcsSource|null);
 
-                    /** ImportSuggestionDenyListEntriesRequest parent */
+                    /** ImportCompletionSuggestionsRequest bigquerySource */
+                    bigquerySource?: (google.cloud.discoveryengine.v1.IBigQuerySource|null);
+
+                    /** ImportCompletionSuggestionsRequest parent */
                     parent?: (string|null);
+
+                    /** ImportCompletionSuggestionsRequest errorConfig */
+                    errorConfig?: (google.cloud.discoveryengine.v1.IImportErrorConfig|null);
                 }
 
-                /** Represents an ImportSuggestionDenyListEntriesRequest. */
-                class ImportSuggestionDenyListEntriesRequest implements IImportSuggestionDenyListEntriesRequest {
+                /** Represents an ImportCompletionSuggestionsRequest. */
+                class ImportCompletionSuggestionsRequest implements IImportCompletionSuggestionsRequest {
 
                     /**
-                     * Constructs a new ImportSuggestionDenyListEntriesRequest.
+                     * Constructs a new ImportCompletionSuggestionsRequest.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesRequest);
+                    constructor(properties?: google.cloud.discoveryengine.v1.IImportCompletionSuggestionsRequest);
 
-                    /** ImportSuggestionDenyListEntriesRequest inlineSource. */
-                    public inlineSource?: (google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource|null);
+                    /** ImportCompletionSuggestionsRequest inlineSource. */
+                    public inlineSource?: (google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.IInlineSource|null);
 
-                    /** ImportSuggestionDenyListEntriesRequest gcsSource. */
+                    /** ImportCompletionSuggestionsRequest gcsSource. */
                     public gcsSource?: (google.cloud.discoveryengine.v1.IGcsSource|null);
 
-                    /** ImportSuggestionDenyListEntriesRequest parent. */
+                    /** ImportCompletionSuggestionsRequest bigquerySource. */
+                    public bigquerySource?: (google.cloud.discoveryengine.v1.IBigQuerySource|null);
+
+                    /** ImportCompletionSuggestionsRequest parent. */
                     public parent: string;
 
-                    /** ImportSuggestionDenyListEntriesRequest source. */
-                    public source?: ("inlineSource"|"gcsSource");
+                    /** ImportCompletionSuggestionsRequest errorConfig. */
+                    public errorConfig?: (google.cloud.discoveryengine.v1.IImportErrorConfig|null);
+
+                    /** ImportCompletionSuggestionsRequest source. */
+                    public source?: ("inlineSource"|"gcsSource"|"bigquerySource");
 
                     /**
-                     * Creates a new ImportSuggestionDenyListEntriesRequest instance using the specified properties.
+                     * Creates a new ImportCompletionSuggestionsRequest instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns ImportSuggestionDenyListEntriesRequest instance
+                     * @returns ImportCompletionSuggestionsRequest instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesRequest): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest;
+                    public static create(properties?: google.cloud.discoveryengine.v1.IImportCompletionSuggestionsRequest): google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest;
 
                     /**
-                     * Encodes the specified ImportSuggestionDenyListEntriesRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.verify|verify} messages.
-                     * @param message ImportSuggestionDenyListEntriesRequest message or plain object to encode
+                     * Encodes the specified ImportCompletionSuggestionsRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.verify|verify} messages.
+                     * @param message ImportCompletionSuggestionsRequest message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesRequest, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.IImportCompletionSuggestionsRequest, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified ImportSuggestionDenyListEntriesRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.verify|verify} messages.
-                     * @param message ImportSuggestionDenyListEntriesRequest message or plain object to encode
+                     * Encodes the specified ImportCompletionSuggestionsRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.verify|verify} messages.
+                     * @param message ImportCompletionSuggestionsRequest message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesRequest, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IImportCompletionSuggestionsRequest, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes an ImportSuggestionDenyListEntriesRequest message from the specified reader or buffer.
+                     * Decodes an ImportCompletionSuggestionsRequest message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns ImportSuggestionDenyListEntriesRequest
+                     * @returns ImportCompletionSuggestionsRequest
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest;
 
                     /**
-                     * Decodes an ImportSuggestionDenyListEntriesRequest message from the specified reader or buffer, length delimited.
+                     * Decodes an ImportCompletionSuggestionsRequest message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns ImportSuggestionDenyListEntriesRequest
+                     * @returns ImportCompletionSuggestionsRequest
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest;
 
                     /**
-                     * Verifies an ImportSuggestionDenyListEntriesRequest message.
+                     * Verifies an ImportCompletionSuggestionsRequest message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates an ImportSuggestionDenyListEntriesRequest message from a plain object. Also converts values to their respective internal types.
+                     * Creates an ImportCompletionSuggestionsRequest message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns ImportSuggestionDenyListEntriesRequest
+                     * @returns ImportCompletionSuggestionsRequest
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest;
 
                     /**
-                     * Creates a plain object from an ImportSuggestionDenyListEntriesRequest message. Also converts values to other types if specified.
-                     * @param message ImportSuggestionDenyListEntriesRequest
+                     * Creates a plain object from an ImportCompletionSuggestionsRequest message. Also converts values to other types if specified.
+                     * @param message ImportCompletionSuggestionsRequest
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this ImportSuggestionDenyListEntriesRequest to JSON.
+                     * Converts this ImportCompletionSuggestionsRequest to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for ImportSuggestionDenyListEntriesRequest
+                     * Gets the default type url for ImportCompletionSuggestionsRequest
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                namespace ImportSuggestionDenyListEntriesRequest {
+                namespace ImportCompletionSuggestionsRequest {
 
                     /** Properties of an InlineSource. */
                     interface IInlineSource {
 
-                        /** InlineSource entries */
-                        entries?: (google.cloud.discoveryengine.v1.ISuggestionDenyListEntry[]|null);
+                        /** InlineSource suggestions */
+                        suggestions?: (google.cloud.discoveryengine.v1.ICompletionSuggestion[]|null);
                     }
 
                     /** Represents an InlineSource. */
@@ -5225,33 +6439,33 @@ export namespace google {
                          * Constructs a new InlineSource.
                          * @param [properties] Properties to set
                          */
-                        constructor(properties?: google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource);
+                        constructor(properties?: google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.IInlineSource);
 
-                        /** InlineSource entries. */
-                        public entries: google.cloud.discoveryengine.v1.ISuggestionDenyListEntry[];
+                        /** InlineSource suggestions. */
+                        public suggestions: google.cloud.discoveryengine.v1.ICompletionSuggestion[];
 
                         /**
                          * Creates a new InlineSource instance using the specified properties.
                          * @param [properties] Properties to set
                          * @returns InlineSource instance
                          */
-                        public static create(properties?: google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource;
+                        public static create(properties?: google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.IInlineSource): google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource;
 
                         /**
-                         * Encodes the specified InlineSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource.verify|verify} messages.
+                         * Encodes the specified InlineSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource.verify|verify} messages.
                          * @param message InlineSource message or plain object to encode
                          * @param [writer] Writer to encode to
                          * @returns Writer
                          */
-                        public static encode(message: google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource, writer?: $protobuf.Writer): $protobuf.Writer;
+                        public static encode(message: google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.IInlineSource, writer?: $protobuf.Writer): $protobuf.Writer;
 
                         /**
-                         * Encodes the specified InlineSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource.verify|verify} messages.
+                         * Encodes the specified InlineSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource.verify|verify} messages.
                          * @param message InlineSource message or plain object to encode
                          * @param [writer] Writer to encode to
                          * @returns Writer
                          */
-                        public static encodeDelimited(message: google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource, writer?: $protobuf.Writer): $protobuf.Writer;
+                        public static encodeDelimited(message: google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.IInlineSource, writer?: $protobuf.Writer): $protobuf.Writer;
 
                         /**
                          * Decodes an InlineSource message from the specified reader or buffer.
@@ -5261,7 +6475,7 @@ export namespace google {
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource;
+                        public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource;
 
                         /**
                          * Decodes an InlineSource message from the specified reader or buffer, length delimited.
@@ -5270,7 +6484,7 @@ export namespace google {
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource;
+                        public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource;
 
                         /**
                          * Verifies an InlineSource message.
@@ -5284,7 +6498,7 @@ export namespace google {
                          * @param object Plain object
                          * @returns InlineSource
                          */
-                        public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource;
+                        public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource;
 
                         /**
                          * Creates a plain object from an InlineSource message. Also converts values to other types if specified.
@@ -5292,7 +6506,7 @@ export namespace google {
                          * @param [options] Conversion options
                          * @returns Plain object
                          */
-                        public static toObject(message: google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                        public static toObject(message: google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                         /**
                          * Converts this InlineSource to JSON.
@@ -5309,212 +6523,218 @@ export namespace google {
                     }
                 }
 
-                /** Properties of an ImportSuggestionDenyListEntriesResponse. */
-                interface IImportSuggestionDenyListEntriesResponse {
+                /** Properties of an ImportCompletionSuggestionsResponse. */
+                interface IImportCompletionSuggestionsResponse {
 
-                    /** ImportSuggestionDenyListEntriesResponse errorSamples */
+                    /** ImportCompletionSuggestionsResponse errorSamples */
                     errorSamples?: (google.rpc.IStatus[]|null);
 
-                    /** ImportSuggestionDenyListEntriesResponse importedEntriesCount */
-                    importedEntriesCount?: (number|Long|string|null);
-
-                    /** ImportSuggestionDenyListEntriesResponse failedEntriesCount */
-                    failedEntriesCount?: (number|Long|string|null);
+                    /** ImportCompletionSuggestionsResponse errorConfig */
+                    errorConfig?: (google.cloud.discoveryengine.v1.IImportErrorConfig|null);
                 }
 
-                /** Represents an ImportSuggestionDenyListEntriesResponse. */
-                class ImportSuggestionDenyListEntriesResponse implements IImportSuggestionDenyListEntriesResponse {
+                /** Represents an ImportCompletionSuggestionsResponse. */
+                class ImportCompletionSuggestionsResponse implements IImportCompletionSuggestionsResponse {
 
                     /**
-                     * Constructs a new ImportSuggestionDenyListEntriesResponse.
+                     * Constructs a new ImportCompletionSuggestionsResponse.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesResponse);
+                    constructor(properties?: google.cloud.discoveryengine.v1.IImportCompletionSuggestionsResponse);
 
-                    /** ImportSuggestionDenyListEntriesResponse errorSamples. */
+                    /** ImportCompletionSuggestionsResponse errorSamples. */
                     public errorSamples: google.rpc.IStatus[];
 
-                    /** ImportSuggestionDenyListEntriesResponse importedEntriesCount. */
-                    public importedEntriesCount: (number|Long|string);
-
-                    /** ImportSuggestionDenyListEntriesResponse failedEntriesCount. */
-                    public failedEntriesCount: (number|Long|string);
+                    /** ImportCompletionSuggestionsResponse errorConfig. */
+                    public errorConfig?: (google.cloud.discoveryengine.v1.IImportErrorConfig|null);
 
                     /**
-                     * Creates a new ImportSuggestionDenyListEntriesResponse instance using the specified properties.
+                     * Creates a new ImportCompletionSuggestionsResponse instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns ImportSuggestionDenyListEntriesResponse instance
+                     * @returns ImportCompletionSuggestionsResponse instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesResponse): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse;
+                    public static create(properties?: google.cloud.discoveryengine.v1.IImportCompletionSuggestionsResponse): google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse;
 
                     /**
-                     * Encodes the specified ImportSuggestionDenyListEntriesResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse.verify|verify} messages.
-                     * @param message ImportSuggestionDenyListEntriesResponse message or plain object to encode
+                     * Encodes the specified ImportCompletionSuggestionsResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse.verify|verify} messages.
+                     * @param message ImportCompletionSuggestionsResponse message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesResponse, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.IImportCompletionSuggestionsResponse, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified ImportSuggestionDenyListEntriesResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse.verify|verify} messages.
-                     * @param message ImportSuggestionDenyListEntriesResponse message or plain object to encode
+                     * Encodes the specified ImportCompletionSuggestionsResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse.verify|verify} messages.
+                     * @param message ImportCompletionSuggestionsResponse message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesResponse, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IImportCompletionSuggestionsResponse, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes an ImportSuggestionDenyListEntriesResponse message from the specified reader or buffer.
+                     * Decodes an ImportCompletionSuggestionsResponse message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns ImportSuggestionDenyListEntriesResponse
+                     * @returns ImportCompletionSuggestionsResponse
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse;
 
                     /**
-                     * Decodes an ImportSuggestionDenyListEntriesResponse message from the specified reader or buffer, length delimited.
+                     * Decodes an ImportCompletionSuggestionsResponse message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns ImportSuggestionDenyListEntriesResponse
+                     * @returns ImportCompletionSuggestionsResponse
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse;
 
                     /**
-                     * Verifies an ImportSuggestionDenyListEntriesResponse message.
+                     * Verifies an ImportCompletionSuggestionsResponse message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates an ImportSuggestionDenyListEntriesResponse message from a plain object. Also converts values to their respective internal types.
+                     * Creates an ImportCompletionSuggestionsResponse message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns ImportSuggestionDenyListEntriesResponse
+                     * @returns ImportCompletionSuggestionsResponse
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse;
 
                     /**
-                     * Creates a plain object from an ImportSuggestionDenyListEntriesResponse message. Also converts values to other types if specified.
-                     * @param message ImportSuggestionDenyListEntriesResponse
+                     * Creates a plain object from an ImportCompletionSuggestionsResponse message. Also converts values to other types if specified.
+                     * @param message ImportCompletionSuggestionsResponse
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this ImportSuggestionDenyListEntriesResponse to JSON.
+                     * Converts this ImportCompletionSuggestionsResponse to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for ImportSuggestionDenyListEntriesResponse
+                     * Gets the default type url for ImportCompletionSuggestionsResponse
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                /** Properties of an ImportSuggestionDenyListEntriesMetadata. */
-                interface IImportSuggestionDenyListEntriesMetadata {
+                /** Properties of an ImportCompletionSuggestionsMetadata. */
+                interface IImportCompletionSuggestionsMetadata {
 
-                    /** ImportSuggestionDenyListEntriesMetadata createTime */
+                    /** ImportCompletionSuggestionsMetadata createTime */
                     createTime?: (google.protobuf.ITimestamp|null);
 
-                    /** ImportSuggestionDenyListEntriesMetadata updateTime */
+                    /** ImportCompletionSuggestionsMetadata updateTime */
                     updateTime?: (google.protobuf.ITimestamp|null);
+
+                    /** ImportCompletionSuggestionsMetadata successCount */
+                    successCount?: (number|Long|string|null);
+
+                    /** ImportCompletionSuggestionsMetadata failureCount */
+                    failureCount?: (number|Long|string|null);
                 }
 
-                /** Represents an ImportSuggestionDenyListEntriesMetadata. */
-                class ImportSuggestionDenyListEntriesMetadata implements IImportSuggestionDenyListEntriesMetadata {
+                /** Represents an ImportCompletionSuggestionsMetadata. */
+                class ImportCompletionSuggestionsMetadata implements IImportCompletionSuggestionsMetadata {
 
                     /**
-                     * Constructs a new ImportSuggestionDenyListEntriesMetadata.
+                     * Constructs a new ImportCompletionSuggestionsMetadata.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesMetadata);
+                    constructor(properties?: google.cloud.discoveryengine.v1.IImportCompletionSuggestionsMetadata);
 
-                    /** ImportSuggestionDenyListEntriesMetadata createTime. */
+                    /** ImportCompletionSuggestionsMetadata createTime. */
                     public createTime?: (google.protobuf.ITimestamp|null);
 
-                    /** ImportSuggestionDenyListEntriesMetadata updateTime. */
+                    /** ImportCompletionSuggestionsMetadata updateTime. */
                     public updateTime?: (google.protobuf.ITimestamp|null);
 
+                    /** ImportCompletionSuggestionsMetadata successCount. */
+                    public successCount: (number|Long|string);
+
+                    /** ImportCompletionSuggestionsMetadata failureCount. */
+                    public failureCount: (number|Long|string);
+
                     /**
-                     * Creates a new ImportSuggestionDenyListEntriesMetadata instance using the specified properties.
+                     * Creates a new ImportCompletionSuggestionsMetadata instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns ImportSuggestionDenyListEntriesMetadata instance
+                     * @returns ImportCompletionSuggestionsMetadata instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesMetadata): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata;
+                    public static create(properties?: google.cloud.discoveryengine.v1.IImportCompletionSuggestionsMetadata): google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata;
 
                     /**
-                     * Encodes the specified ImportSuggestionDenyListEntriesMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata.verify|verify} messages.
-                     * @param message ImportSuggestionDenyListEntriesMetadata message or plain object to encode
+                     * Encodes the specified ImportCompletionSuggestionsMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata.verify|verify} messages.
+                     * @param message ImportCompletionSuggestionsMetadata message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.IImportCompletionSuggestionsMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified ImportSuggestionDenyListEntriesMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata.verify|verify} messages.
-                     * @param message ImportSuggestionDenyListEntriesMetadata message or plain object to encode
+                     * Encodes the specified ImportCompletionSuggestionsMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata.verify|verify} messages.
+                     * @param message ImportCompletionSuggestionsMetadata message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IImportCompletionSuggestionsMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes an ImportSuggestionDenyListEntriesMetadata message from the specified reader or buffer.
+                     * Decodes an ImportCompletionSuggestionsMetadata message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns ImportSuggestionDenyListEntriesMetadata
+                     * @returns ImportCompletionSuggestionsMetadata
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata;
 
                     /**
-                     * Decodes an ImportSuggestionDenyListEntriesMetadata message from the specified reader or buffer, length delimited.
+                     * Decodes an ImportCompletionSuggestionsMetadata message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns ImportSuggestionDenyListEntriesMetadata
+                     * @returns ImportCompletionSuggestionsMetadata
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata;
 
                     /**
-                     * Verifies an ImportSuggestionDenyListEntriesMetadata message.
+                     * Verifies an ImportCompletionSuggestionsMetadata message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates an ImportSuggestionDenyListEntriesMetadata message from a plain object. Also converts values to their respective internal types.
+                     * Creates an ImportCompletionSuggestionsMetadata message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns ImportSuggestionDenyListEntriesMetadata
+                     * @returns ImportCompletionSuggestionsMetadata
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata;
 
                     /**
-                     * Creates a plain object from an ImportSuggestionDenyListEntriesMetadata message. Also converts values to other types if specified.
-                     * @param message ImportSuggestionDenyListEntriesMetadata
+                     * Creates a plain object from an ImportCompletionSuggestionsMetadata message. Also converts values to other types if specified.
+                     * @param message ImportCompletionSuggestionsMetadata
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this ImportSuggestionDenyListEntriesMetadata to JSON.
+                     * Converts this ImportCompletionSuggestionsMetadata to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for ImportSuggestionDenyListEntriesMetadata
+                     * Gets the default type url for ImportCompletionSuggestionsMetadata
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
@@ -5747,1707 +6967,2010 @@ export namespace google {
                          */
                         public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.Document.Content;
 
-                        /**
-                         * Verifies a Content message.
-                         * @param message Plain object to verify
-                         * @returns `null` if valid, otherwise the reason why it is not
-                         */
-                        public static verify(message: { [k: string]: any }): (string|null);
+                        /**
+                         * Verifies a Content message.
+                         * @param message Plain object to verify
+                         * @returns `null` if valid, otherwise the reason why it is not
+                         */
+                        public static verify(message: { [k: string]: any }): (string|null);
+
+                        /**
+                         * Creates a Content message from a plain object. Also converts values to their respective internal types.
+                         * @param object Plain object
+                         * @returns Content
+                         */
+                        public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.Document.Content;
+
+                        /**
+                         * Creates a plain object from a Content message. Also converts values to other types if specified.
+                         * @param message Content
+                         * @param [options] Conversion options
+                         * @returns Plain object
+                         */
+                        public static toObject(message: google.cloud.discoveryengine.v1.Document.Content, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                        /**
+                         * Converts this Content to JSON.
+                         * @returns JSON object
+                         */
+                        public toJSON(): { [k: string]: any };
+
+                        /**
+                         * Gets the default type url for Content
+                         * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns The default type url
+                         */
+                        public static getTypeUrl(typeUrlPrefix?: string): string;
+                    }
+                }
+
+                /** Properties of a UserEvent. */
+                interface IUserEvent {
+
+                    /** UserEvent eventType */
+                    eventType?: (string|null);
+
+                    /** UserEvent userPseudoId */
+                    userPseudoId?: (string|null);
+
+                    /** UserEvent engine */
+                    engine?: (string|null);
+
+                    /** UserEvent dataStore */
+                    dataStore?: (string|null);
+
+                    /** UserEvent eventTime */
+                    eventTime?: (google.protobuf.ITimestamp|null);
+
+                    /** UserEvent userInfo */
+                    userInfo?: (google.cloud.discoveryengine.v1.IUserInfo|null);
+
+                    /** UserEvent directUserRequest */
+                    directUserRequest?: (boolean|null);
+
+                    /** UserEvent sessionId */
+                    sessionId?: (string|null);
+
+                    /** UserEvent pageInfo */
+                    pageInfo?: (google.cloud.discoveryengine.v1.IPageInfo|null);
+
+                    /** UserEvent attributionToken */
+                    attributionToken?: (string|null);
+
+                    /** UserEvent filter */
+                    filter?: (string|null);
+
+                    /** UserEvent documents */
+                    documents?: (google.cloud.discoveryengine.v1.IDocumentInfo[]|null);
+
+                    /** UserEvent panel */
+                    panel?: (google.cloud.discoveryengine.v1.IPanelInfo|null);
+
+                    /** UserEvent searchInfo */
+                    searchInfo?: (google.cloud.discoveryengine.v1.ISearchInfo|null);
+
+                    /** UserEvent completionInfo */
+                    completionInfo?: (google.cloud.discoveryengine.v1.ICompletionInfo|null);
+
+                    /** UserEvent transactionInfo */
+                    transactionInfo?: (google.cloud.discoveryengine.v1.ITransactionInfo|null);
+
+                    /** UserEvent tagIds */
+                    tagIds?: (string[]|null);
+
+                    /** UserEvent promotionIds */
+                    promotionIds?: (string[]|null);
+
+                    /** UserEvent attributes */
+                    attributes?: ({ [k: string]: google.cloud.discoveryengine.v1.ICustomAttribute }|null);
+
+                    /** UserEvent mediaInfo */
+                    mediaInfo?: (google.cloud.discoveryengine.v1.IMediaInfo|null);
+                }
+
+                /** Represents a UserEvent. */
+                class UserEvent implements IUserEvent {
+
+                    /**
+                     * Constructs a new UserEvent.
+                     * @param [properties] Properties to set
+                     */
+                    constructor(properties?: google.cloud.discoveryengine.v1.IUserEvent);
+
+                    /** UserEvent eventType. */
+                    public eventType: string;
+
+                    /** UserEvent userPseudoId. */
+                    public userPseudoId: string;
+
+                    /** UserEvent engine. */
+                    public engine: string;
+
+                    /** UserEvent dataStore. */
+                    public dataStore: string;
+
+                    /** UserEvent eventTime. */
+                    public eventTime?: (google.protobuf.ITimestamp|null);
+
+                    /** UserEvent userInfo. */
+                    public userInfo?: (google.cloud.discoveryengine.v1.IUserInfo|null);
+
+                    /** UserEvent directUserRequest. */
+                    public directUserRequest: boolean;
+
+                    /** UserEvent sessionId. */
+                    public sessionId: string;
+
+                    /** UserEvent pageInfo. */
+                    public pageInfo?: (google.cloud.discoveryengine.v1.IPageInfo|null);
+
+                    /** UserEvent attributionToken. */
+                    public attributionToken: string;
+
+                    /** UserEvent filter. */
+                    public filter: string;
+
+                    /** UserEvent documents. */
+                    public documents: google.cloud.discoveryengine.v1.IDocumentInfo[];
+
+                    /** UserEvent panel. */
+                    public panel?: (google.cloud.discoveryengine.v1.IPanelInfo|null);
+
+                    /** UserEvent searchInfo. */
+                    public searchInfo?: (google.cloud.discoveryengine.v1.ISearchInfo|null);
+
+                    /** UserEvent completionInfo. */
+                    public completionInfo?: (google.cloud.discoveryengine.v1.ICompletionInfo|null);
+
+                    /** UserEvent transactionInfo. */
+                    public transactionInfo?: (google.cloud.discoveryengine.v1.ITransactionInfo|null);
+
+                    /** UserEvent tagIds. */
+                    public tagIds: string[];
+
+                    /** UserEvent promotionIds. */
+                    public promotionIds: string[];
+
+                    /** UserEvent attributes. */
+                    public attributes: { [k: string]: google.cloud.discoveryengine.v1.ICustomAttribute };
+
+                    /** UserEvent mediaInfo. */
+                    public mediaInfo?: (google.cloud.discoveryengine.v1.IMediaInfo|null);
+
+                    /**
+                     * Creates a new UserEvent instance using the specified properties.
+                     * @param [properties] Properties to set
+                     * @returns UserEvent instance
+                     */
+                    public static create(properties?: google.cloud.discoveryengine.v1.IUserEvent): google.cloud.discoveryengine.v1.UserEvent;
+
+                    /**
+                     * Encodes the specified UserEvent message. Does not implicitly {@link google.cloud.discoveryengine.v1.UserEvent.verify|verify} messages.
+                     * @param message UserEvent message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encode(message: google.cloud.discoveryengine.v1.IUserEvent, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                    /**
+                     * Encodes the specified UserEvent message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.UserEvent.verify|verify} messages.
+                     * @param message UserEvent message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IUserEvent, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                    /**
+                     * Decodes a UserEvent message from the specified reader or buffer.
+                     * @param reader Reader or buffer to decode from
+                     * @param [length] Message length if known beforehand
+                     * @returns UserEvent
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.UserEvent;
+
+                    /**
+                     * Decodes a UserEvent message from the specified reader or buffer, length delimited.
+                     * @param reader Reader or buffer to decode from
+                     * @returns UserEvent
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.UserEvent;
+
+                    /**
+                     * Verifies a UserEvent message.
+                     * @param message Plain object to verify
+                     * @returns `null` if valid, otherwise the reason why it is not
+                     */
+                    public static verify(message: { [k: string]: any }): (string|null);
+
+                    /**
+                     * Creates a UserEvent message from a plain object. Also converts values to their respective internal types.
+                     * @param object Plain object
+                     * @returns UserEvent
+                     */
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.UserEvent;
+
+                    /**
+                     * Creates a plain object from a UserEvent message. Also converts values to other types if specified.
+                     * @param message UserEvent
+                     * @param [options] Conversion options
+                     * @returns Plain object
+                     */
+                    public static toObject(message: google.cloud.discoveryengine.v1.UserEvent, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                    /**
+                     * Converts this UserEvent to JSON.
+                     * @returns JSON object
+                     */
+                    public toJSON(): { [k: string]: any };
+
+                    /**
+                     * Gets the default type url for UserEvent
+                     * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                     * @returns The default type url
+                     */
+                    public static getTypeUrl(typeUrlPrefix?: string): string;
+                }
+
+                /** Properties of a PageInfo. */
+                interface IPageInfo {
 
-                        /**
-                         * Creates a Content message from a plain object. Also converts values to their respective internal types.
-                         * @param object Plain object
-                         * @returns Content
-                         */
-                        public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.Document.Content;
+                    /** PageInfo pageviewId */
+                    pageviewId?: (string|null);
 
-                        /**
-                         * Creates a plain object from a Content message. Also converts values to other types if specified.
-                         * @param message Content
-                         * @param [options] Conversion options
-                         * @returns Plain object
-                         */
-                        public static toObject(message: google.cloud.discoveryengine.v1.Document.Content, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    /** PageInfo pageCategory */
+                    pageCategory?: (string|null);
 
-                        /**
-                         * Converts this Content to JSON.
-                         * @returns JSON object
-                         */
-                        public toJSON(): { [k: string]: any };
+                    /** PageInfo uri */
+                    uri?: (string|null);
 
-                        /**
-                         * Gets the default type url for Content
-                         * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                         * @returns The default type url
-                         */
-                        public static getTypeUrl(typeUrlPrefix?: string): string;
-                    }
+                    /** PageInfo referrerUri */
+                    referrerUri?: (string|null);
                 }
 
-                /** Properties of a UserEvent. */
-                interface IUserEvent {
-
-                    /** UserEvent eventType */
-                    eventType?: (string|null);
+                /** Represents a PageInfo. */
+                class PageInfo implements IPageInfo {
 
-                    /** UserEvent userPseudoId */
-                    userPseudoId?: (string|null);
+                    /**
+                     * Constructs a new PageInfo.
+                     * @param [properties] Properties to set
+                     */
+                    constructor(properties?: google.cloud.discoveryengine.v1.IPageInfo);
 
-                    /** UserEvent engine */
-                    engine?: (string|null);
+                    /** PageInfo pageviewId. */
+                    public pageviewId: string;
 
-                    /** UserEvent dataStore */
-                    dataStore?: (string|null);
+                    /** PageInfo pageCategory. */
+                    public pageCategory: string;
 
-                    /** UserEvent eventTime */
-                    eventTime?: (google.protobuf.ITimestamp|null);
+                    /** PageInfo uri. */
+                    public uri: string;
 
-                    /** UserEvent userInfo */
-                    userInfo?: (google.cloud.discoveryengine.v1.IUserInfo|null);
+                    /** PageInfo referrerUri. */
+                    public referrerUri: string;
 
-                    /** UserEvent directUserRequest */
-                    directUserRequest?: (boolean|null);
+                    /**
+                     * Creates a new PageInfo instance using the specified properties.
+                     * @param [properties] Properties to set
+                     * @returns PageInfo instance
+                     */
+                    public static create(properties?: google.cloud.discoveryengine.v1.IPageInfo): google.cloud.discoveryengine.v1.PageInfo;
 
-                    /** UserEvent sessionId */
-                    sessionId?: (string|null);
+                    /**
+                     * Encodes the specified PageInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.PageInfo.verify|verify} messages.
+                     * @param message PageInfo message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encode(message: google.cloud.discoveryengine.v1.IPageInfo, writer?: $protobuf.Writer): $protobuf.Writer;
 
-                    /** UserEvent pageInfo */
-                    pageInfo?: (google.cloud.discoveryengine.v1.IPageInfo|null);
+                    /**
+                     * Encodes the specified PageInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PageInfo.verify|verify} messages.
+                     * @param message PageInfo message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IPageInfo, writer?: $protobuf.Writer): $protobuf.Writer;
 
-                    /** UserEvent attributionToken */
-                    attributionToken?: (string|null);
+                    /**
+                     * Decodes a PageInfo message from the specified reader or buffer.
+                     * @param reader Reader or buffer to decode from
+                     * @param [length] Message length if known beforehand
+                     * @returns PageInfo
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.PageInfo;
 
-                    /** UserEvent filter */
-                    filter?: (string|null);
+                    /**
+                     * Decodes a PageInfo message from the specified reader or buffer, length delimited.
+                     * @param reader Reader or buffer to decode from
+                     * @returns PageInfo
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.PageInfo;
 
-                    /** UserEvent documents */
-                    documents?: (google.cloud.discoveryengine.v1.IDocumentInfo[]|null);
+                    /**
+                     * Verifies a PageInfo message.
+                     * @param message Plain object to verify
+                     * @returns `null` if valid, otherwise the reason why it is not
+                     */
+                    public static verify(message: { [k: string]: any }): (string|null);
 
-                    /** UserEvent panel */
-                    panel?: (google.cloud.discoveryengine.v1.IPanelInfo|null);
+                    /**
+                     * Creates a PageInfo message from a plain object. Also converts values to their respective internal types.
+                     * @param object Plain object
+                     * @returns PageInfo
+                     */
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.PageInfo;
 
-                    /** UserEvent searchInfo */
-                    searchInfo?: (google.cloud.discoveryengine.v1.ISearchInfo|null);
+                    /**
+                     * Creates a plain object from a PageInfo message. Also converts values to other types if specified.
+                     * @param message PageInfo
+                     * @param [options] Conversion options
+                     * @returns Plain object
+                     */
+                    public static toObject(message: google.cloud.discoveryengine.v1.PageInfo, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
-                    /** UserEvent completionInfo */
-                    completionInfo?: (google.cloud.discoveryengine.v1.ICompletionInfo|null);
+                    /**
+                     * Converts this PageInfo to JSON.
+                     * @returns JSON object
+                     */
+                    public toJSON(): { [k: string]: any };
 
-                    /** UserEvent transactionInfo */
-                    transactionInfo?: (google.cloud.discoveryengine.v1.ITransactionInfo|null);
+                    /**
+                     * Gets the default type url for PageInfo
+                     * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                     * @returns The default type url
+                     */
+                    public static getTypeUrl(typeUrlPrefix?: string): string;
+                }
 
-                    /** UserEvent tagIds */
-                    tagIds?: (string[]|null);
+                /** Properties of a SearchInfo. */
+                interface ISearchInfo {
 
-                    /** UserEvent promotionIds */
-                    promotionIds?: (string[]|null);
+                    /** SearchInfo searchQuery */
+                    searchQuery?: (string|null);
 
-                    /** UserEvent attributes */
-                    attributes?: ({ [k: string]: google.cloud.discoveryengine.v1.ICustomAttribute }|null);
+                    /** SearchInfo orderBy */
+                    orderBy?: (string|null);
 
-                    /** UserEvent mediaInfo */
-                    mediaInfo?: (google.cloud.discoveryengine.v1.IMediaInfo|null);
+                    /** SearchInfo offset */
+                    offset?: (number|null);
                 }
 
-                /** Represents a UserEvent. */
-                class UserEvent implements IUserEvent {
+                /** Represents a SearchInfo. */
+                class SearchInfo implements ISearchInfo {
 
                     /**
-                     * Constructs a new UserEvent.
+                     * Constructs a new SearchInfo.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.cloud.discoveryengine.v1.IUserEvent);
+                    constructor(properties?: google.cloud.discoveryengine.v1.ISearchInfo);
 
-                    /** UserEvent eventType. */
-                    public eventType: string;
+                    /** SearchInfo searchQuery. */
+                    public searchQuery: string;
 
-                    /** UserEvent userPseudoId. */
-                    public userPseudoId: string;
+                    /** SearchInfo orderBy. */
+                    public orderBy: string;
 
-                    /** UserEvent engine. */
-                    public engine: string;
+                    /** SearchInfo offset. */
+                    public offset?: (number|null);
 
-                    /** UserEvent dataStore. */
-                    public dataStore: string;
+                    /** SearchInfo _offset. */
+                    public _offset?: "offset";
 
-                    /** UserEvent eventTime. */
-                    public eventTime?: (google.protobuf.ITimestamp|null);
+                    /**
+                     * Creates a new SearchInfo instance using the specified properties.
+                     * @param [properties] Properties to set
+                     * @returns SearchInfo instance
+                     */
+                    public static create(properties?: google.cloud.discoveryengine.v1.ISearchInfo): google.cloud.discoveryengine.v1.SearchInfo;
 
-                    /** UserEvent userInfo. */
-                    public userInfo?: (google.cloud.discoveryengine.v1.IUserInfo|null);
+                    /**
+                     * Encodes the specified SearchInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchInfo.verify|verify} messages.
+                     * @param message SearchInfo message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encode(message: google.cloud.discoveryengine.v1.ISearchInfo, writer?: $protobuf.Writer): $protobuf.Writer;
 
-                    /** UserEvent directUserRequest. */
-                    public directUserRequest: boolean;
+                    /**
+                     * Encodes the specified SearchInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchInfo.verify|verify} messages.
+                     * @param message SearchInfo message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.ISearchInfo, writer?: $protobuf.Writer): $protobuf.Writer;
 
-                    /** UserEvent sessionId. */
-                    public sessionId: string;
+                    /**
+                     * Decodes a SearchInfo message from the specified reader or buffer.
+                     * @param reader Reader or buffer to decode from
+                     * @param [length] Message length if known beforehand
+                     * @returns SearchInfo
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.SearchInfo;
 
-                    /** UserEvent pageInfo. */
-                    public pageInfo?: (google.cloud.discoveryengine.v1.IPageInfo|null);
+                    /**
+                     * Decodes a SearchInfo message from the specified reader or buffer, length delimited.
+                     * @param reader Reader or buffer to decode from
+                     * @returns SearchInfo
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.SearchInfo;
 
-                    /** UserEvent attributionToken. */
-                    public attributionToken: string;
+                    /**
+                     * Verifies a SearchInfo message.
+                     * @param message Plain object to verify
+                     * @returns `null` if valid, otherwise the reason why it is not
+                     */
+                    public static verify(message: { [k: string]: any }): (string|null);
 
-                    /** UserEvent filter. */
-                    public filter: string;
+                    /**
+                     * Creates a SearchInfo message from a plain object. Also converts values to their respective internal types.
+                     * @param object Plain object
+                     * @returns SearchInfo
+                     */
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.SearchInfo;
 
-                    /** UserEvent documents. */
-                    public documents: google.cloud.discoveryengine.v1.IDocumentInfo[];
+                    /**
+                     * Creates a plain object from a SearchInfo message. Also converts values to other types if specified.
+                     * @param message SearchInfo
+                     * @param [options] Conversion options
+                     * @returns Plain object
+                     */
+                    public static toObject(message: google.cloud.discoveryengine.v1.SearchInfo, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
-                    /** UserEvent panel. */
-                    public panel?: (google.cloud.discoveryengine.v1.IPanelInfo|null);
+                    /**
+                     * Converts this SearchInfo to JSON.
+                     * @returns JSON object
+                     */
+                    public toJSON(): { [k: string]: any };
 
-                    /** UserEvent searchInfo. */
-                    public searchInfo?: (google.cloud.discoveryengine.v1.ISearchInfo|null);
+                    /**
+                     * Gets the default type url for SearchInfo
+                     * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                     * @returns The default type url
+                     */
+                    public static getTypeUrl(typeUrlPrefix?: string): string;
+                }
 
-                    /** UserEvent completionInfo. */
-                    public completionInfo?: (google.cloud.discoveryengine.v1.ICompletionInfo|null);
+                /** Properties of a CompletionInfo. */
+                interface ICompletionInfo {
 
-                    /** UserEvent transactionInfo. */
-                    public transactionInfo?: (google.cloud.discoveryengine.v1.ITransactionInfo|null);
+                    /** CompletionInfo selectedSuggestion */
+                    selectedSuggestion?: (string|null);
 
-                    /** UserEvent tagIds. */
-                    public tagIds: string[];
+                    /** CompletionInfo selectedPosition */
+                    selectedPosition?: (number|null);
+                }
 
-                    /** UserEvent promotionIds. */
-                    public promotionIds: string[];
+                /** Represents a CompletionInfo. */
+                class CompletionInfo implements ICompletionInfo {
 
-                    /** UserEvent attributes. */
-                    public attributes: { [k: string]: google.cloud.discoveryengine.v1.ICustomAttribute };
+                    /**
+                     * Constructs a new CompletionInfo.
+                     * @param [properties] Properties to set
+                     */
+                    constructor(properties?: google.cloud.discoveryengine.v1.ICompletionInfo);
 
-                    /** UserEvent mediaInfo. */
-                    public mediaInfo?: (google.cloud.discoveryengine.v1.IMediaInfo|null);
+                    /** CompletionInfo selectedSuggestion. */
+                    public selectedSuggestion: string;
+
+                    /** CompletionInfo selectedPosition. */
+                    public selectedPosition: number;
 
                     /**
-                     * Creates a new UserEvent instance using the specified properties.
+                     * Creates a new CompletionInfo instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns UserEvent instance
+                     * @returns CompletionInfo instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.IUserEvent): google.cloud.discoveryengine.v1.UserEvent;
+                    public static create(properties?: google.cloud.discoveryengine.v1.ICompletionInfo): google.cloud.discoveryengine.v1.CompletionInfo;
 
                     /**
-                     * Encodes the specified UserEvent message. Does not implicitly {@link google.cloud.discoveryengine.v1.UserEvent.verify|verify} messages.
-                     * @param message UserEvent message or plain object to encode
+                     * Encodes the specified CompletionInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.CompletionInfo.verify|verify} messages.
+                     * @param message CompletionInfo message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.IUserEvent, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.ICompletionInfo, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified UserEvent message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.UserEvent.verify|verify} messages.
-                     * @param message UserEvent message or plain object to encode
+                     * Encodes the specified CompletionInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.CompletionInfo.verify|verify} messages.
+                     * @param message CompletionInfo message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IUserEvent, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.ICompletionInfo, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes a UserEvent message from the specified reader or buffer.
+                     * Decodes a CompletionInfo message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns UserEvent
+                     * @returns CompletionInfo
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.UserEvent;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.CompletionInfo;
 
                     /**
-                     * Decodes a UserEvent message from the specified reader or buffer, length delimited.
+                     * Decodes a CompletionInfo message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns UserEvent
+                     * @returns CompletionInfo
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.UserEvent;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.CompletionInfo;
 
                     /**
-                     * Verifies a UserEvent message.
+                     * Verifies a CompletionInfo message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates a UserEvent message from a plain object. Also converts values to their respective internal types.
+                     * Creates a CompletionInfo message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns UserEvent
+                     * @returns CompletionInfo
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.UserEvent;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.CompletionInfo;
 
                     /**
-                     * Creates a plain object from a UserEvent message. Also converts values to other types if specified.
-                     * @param message UserEvent
+                     * Creates a plain object from a CompletionInfo message. Also converts values to other types if specified.
+                     * @param message CompletionInfo
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.UserEvent, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.CompletionInfo, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this UserEvent to JSON.
+                     * Converts this CompletionInfo to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for UserEvent
+                     * Gets the default type url for CompletionInfo
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                /** Properties of a PageInfo. */
-                interface IPageInfo {
+                /** Properties of a TransactionInfo. */
+                interface ITransactionInfo {
 
-                    /** PageInfo pageviewId */
-                    pageviewId?: (string|null);
+                    /** TransactionInfo value */
+                    value?: (number|null);
 
-                    /** PageInfo pageCategory */
-                    pageCategory?: (string|null);
+                    /** TransactionInfo currency */
+                    currency?: (string|null);
 
-                    /** PageInfo uri */
-                    uri?: (string|null);
+                    /** TransactionInfo transactionId */
+                    transactionId?: (string|null);
 
-                    /** PageInfo referrerUri */
-                    referrerUri?: (string|null);
+                    /** TransactionInfo tax */
+                    tax?: (number|null);
+
+                    /** TransactionInfo cost */
+                    cost?: (number|null);
+
+                    /** TransactionInfo discountValue */
+                    discountValue?: (number|null);
                 }
 
-                /** Represents a PageInfo. */
-                class PageInfo implements IPageInfo {
+                /** Represents a TransactionInfo. */
+                class TransactionInfo implements ITransactionInfo {
 
                     /**
-                     * Constructs a new PageInfo.
+                     * Constructs a new TransactionInfo.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.cloud.discoveryengine.v1.IPageInfo);
+                    constructor(properties?: google.cloud.discoveryengine.v1.ITransactionInfo);
 
-                    /** PageInfo pageviewId. */
-                    public pageviewId: string;
+                    /** TransactionInfo value. */
+                    public value?: (number|null);
 
-                    /** PageInfo pageCategory. */
-                    public pageCategory: string;
+                    /** TransactionInfo currency. */
+                    public currency: string;
 
-                    /** PageInfo uri. */
-                    public uri: string;
+                    /** TransactionInfo transactionId. */
+                    public transactionId: string;
 
-                    /** PageInfo referrerUri. */
-                    public referrerUri: string;
+                    /** TransactionInfo tax. */
+                    public tax?: (number|null);
+
+                    /** TransactionInfo cost. */
+                    public cost?: (number|null);
+
+                    /** TransactionInfo discountValue. */
+                    public discountValue?: (number|null);
+
+                    /** TransactionInfo _value. */
+                    public _value?: "value";
+
+                    /** TransactionInfo _tax. */
+                    public _tax?: "tax";
+
+                    /** TransactionInfo _cost. */
+                    public _cost?: "cost";
+
+                    /** TransactionInfo _discountValue. */
+                    public _discountValue?: "discountValue";
 
                     /**
-                     * Creates a new PageInfo instance using the specified properties.
+                     * Creates a new TransactionInfo instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns PageInfo instance
+                     * @returns TransactionInfo instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.IPageInfo): google.cloud.discoveryengine.v1.PageInfo;
+                    public static create(properties?: google.cloud.discoveryengine.v1.ITransactionInfo): google.cloud.discoveryengine.v1.TransactionInfo;
 
                     /**
-                     * Encodes the specified PageInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.PageInfo.verify|verify} messages.
-                     * @param message PageInfo message or plain object to encode
+                     * Encodes the specified TransactionInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.TransactionInfo.verify|verify} messages.
+                     * @param message TransactionInfo message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.IPageInfo, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.ITransactionInfo, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified PageInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PageInfo.verify|verify} messages.
-                     * @param message PageInfo message or plain object to encode
+                     * Encodes the specified TransactionInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.TransactionInfo.verify|verify} messages.
+                     * @param message TransactionInfo message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IPageInfo, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.ITransactionInfo, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes a PageInfo message from the specified reader or buffer.
+                     * Decodes a TransactionInfo message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns PageInfo
+                     * @returns TransactionInfo
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.PageInfo;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.TransactionInfo;
 
                     /**
-                     * Decodes a PageInfo message from the specified reader or buffer, length delimited.
+                     * Decodes a TransactionInfo message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns PageInfo
+                     * @returns TransactionInfo
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.PageInfo;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.TransactionInfo;
 
                     /**
-                     * Verifies a PageInfo message.
+                     * Verifies a TransactionInfo message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates a PageInfo message from a plain object. Also converts values to their respective internal types.
+                     * Creates a TransactionInfo message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns PageInfo
+                     * @returns TransactionInfo
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.PageInfo;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.TransactionInfo;
 
                     /**
-                     * Creates a plain object from a PageInfo message. Also converts values to other types if specified.
-                     * @param message PageInfo
+                     * Creates a plain object from a TransactionInfo message. Also converts values to other types if specified.
+                     * @param message TransactionInfo
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.PageInfo, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.TransactionInfo, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this PageInfo to JSON.
+                     * Converts this TransactionInfo to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for PageInfo
+                     * Gets the default type url for TransactionInfo
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                /** Properties of a SearchInfo. */
-                interface ISearchInfo {
+                /** Properties of a DocumentInfo. */
+                interface IDocumentInfo {
 
-                    /** SearchInfo searchQuery */
-                    searchQuery?: (string|null);
+                    /** DocumentInfo id */
+                    id?: (string|null);
 
-                    /** SearchInfo orderBy */
-                    orderBy?: (string|null);
+                    /** DocumentInfo name */
+                    name?: (string|null);
 
-                    /** SearchInfo offset */
-                    offset?: (number|null);
+                    /** DocumentInfo uri */
+                    uri?: (string|null);
+
+                    /** DocumentInfo quantity */
+                    quantity?: (number|null);
+
+                    /** DocumentInfo promotionIds */
+                    promotionIds?: (string[]|null);
                 }
 
-                /** Represents a SearchInfo. */
-                class SearchInfo implements ISearchInfo {
+                /** Represents a DocumentInfo. */
+                class DocumentInfo implements IDocumentInfo {
 
                     /**
-                     * Constructs a new SearchInfo.
+                     * Constructs a new DocumentInfo.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.cloud.discoveryengine.v1.ISearchInfo);
+                    constructor(properties?: google.cloud.discoveryengine.v1.IDocumentInfo);
 
-                    /** SearchInfo searchQuery. */
-                    public searchQuery: string;
+                    /** DocumentInfo id. */
+                    public id?: (string|null);
 
-                    /** SearchInfo orderBy. */
-                    public orderBy: string;
+                    /** DocumentInfo name. */
+                    public name?: (string|null);
 
-                    /** SearchInfo offset. */
-                    public offset?: (number|null);
+                    /** DocumentInfo uri. */
+                    public uri?: (string|null);
 
-                    /** SearchInfo _offset. */
-                    public _offset?: "offset";
+                    /** DocumentInfo quantity. */
+                    public quantity?: (number|null);
+
+                    /** DocumentInfo promotionIds. */
+                    public promotionIds: string[];
+
+                    /** DocumentInfo documentDescriptor. */
+                    public documentDescriptor?: ("id"|"name"|"uri");
+
+                    /** DocumentInfo _quantity. */
+                    public _quantity?: "quantity";
 
                     /**
-                     * Creates a new SearchInfo instance using the specified properties.
+                     * Creates a new DocumentInfo instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns SearchInfo instance
+                     * @returns DocumentInfo instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.ISearchInfo): google.cloud.discoveryengine.v1.SearchInfo;
+                    public static create(properties?: google.cloud.discoveryengine.v1.IDocumentInfo): google.cloud.discoveryengine.v1.DocumentInfo;
 
                     /**
-                     * Encodes the specified SearchInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchInfo.verify|verify} messages.
-                     * @param message SearchInfo message or plain object to encode
+                     * Encodes the specified DocumentInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentInfo.verify|verify} messages.
+                     * @param message DocumentInfo message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.ISearchInfo, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.IDocumentInfo, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified SearchInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchInfo.verify|verify} messages.
-                     * @param message SearchInfo message or plain object to encode
+                     * Encodes the specified DocumentInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentInfo.verify|verify} messages.
+                     * @param message DocumentInfo message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.ISearchInfo, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IDocumentInfo, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes a SearchInfo message from the specified reader or buffer.
+                     * Decodes a DocumentInfo message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns SearchInfo
+                     * @returns DocumentInfo
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.SearchInfo;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.DocumentInfo;
 
                     /**
-                     * Decodes a SearchInfo message from the specified reader or buffer, length delimited.
+                     * Decodes a DocumentInfo message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns SearchInfo
+                     * @returns DocumentInfo
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.SearchInfo;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.DocumentInfo;
 
                     /**
-                     * Verifies a SearchInfo message.
+                     * Verifies a DocumentInfo message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates a SearchInfo message from a plain object. Also converts values to their respective internal types.
+                     * Creates a DocumentInfo message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns SearchInfo
+                     * @returns DocumentInfo
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.SearchInfo;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.DocumentInfo;
 
                     /**
-                     * Creates a plain object from a SearchInfo message. Also converts values to other types if specified.
-                     * @param message SearchInfo
+                     * Creates a plain object from a DocumentInfo message. Also converts values to other types if specified.
+                     * @param message DocumentInfo
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.SearchInfo, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.DocumentInfo, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this SearchInfo to JSON.
+                     * Converts this DocumentInfo to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for SearchInfo
+                     * Gets the default type url for DocumentInfo
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                /** Properties of a CompletionInfo. */
-                interface ICompletionInfo {
+                /** Properties of a PanelInfo. */
+                interface IPanelInfo {
 
-                    /** CompletionInfo selectedSuggestion */
-                    selectedSuggestion?: (string|null);
+                    /** PanelInfo panelId */
+                    panelId?: (string|null);
 
-                    /** CompletionInfo selectedPosition */
-                    selectedPosition?: (number|null);
+                    /** PanelInfo displayName */
+                    displayName?: (string|null);
+
+                    /** PanelInfo panelPosition */
+                    panelPosition?: (number|null);
+
+                    /** PanelInfo totalPanels */
+                    totalPanels?: (number|null);
                 }
 
-                /** Represents a CompletionInfo. */
-                class CompletionInfo implements ICompletionInfo {
+                /** Represents a PanelInfo. */
+                class PanelInfo implements IPanelInfo {
 
                     /**
-                     * Constructs a new CompletionInfo.
+                     * Constructs a new PanelInfo.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.cloud.discoveryengine.v1.ICompletionInfo);
+                    constructor(properties?: google.cloud.discoveryengine.v1.IPanelInfo);
 
-                    /** CompletionInfo selectedSuggestion. */
-                    public selectedSuggestion: string;
+                    /** PanelInfo panelId. */
+                    public panelId: string;
 
-                    /** CompletionInfo selectedPosition. */
-                    public selectedPosition: number;
+                    /** PanelInfo displayName. */
+                    public displayName: string;
+
+                    /** PanelInfo panelPosition. */
+                    public panelPosition?: (number|null);
+
+                    /** PanelInfo totalPanels. */
+                    public totalPanels?: (number|null);
+
+                    /** PanelInfo _panelPosition. */
+                    public _panelPosition?: "panelPosition";
+
+                    /** PanelInfo _totalPanels. */
+                    public _totalPanels?: "totalPanels";
 
                     /**
-                     * Creates a new CompletionInfo instance using the specified properties.
+                     * Creates a new PanelInfo instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns CompletionInfo instance
+                     * @returns PanelInfo instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.ICompletionInfo): google.cloud.discoveryengine.v1.CompletionInfo;
+                    public static create(properties?: google.cloud.discoveryengine.v1.IPanelInfo): google.cloud.discoveryengine.v1.PanelInfo;
 
                     /**
-                     * Encodes the specified CompletionInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.CompletionInfo.verify|verify} messages.
-                     * @param message CompletionInfo message or plain object to encode
+                     * Encodes the specified PanelInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.PanelInfo.verify|verify} messages.
+                     * @param message PanelInfo message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.ICompletionInfo, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.IPanelInfo, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified CompletionInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.CompletionInfo.verify|verify} messages.
-                     * @param message CompletionInfo message or plain object to encode
+                     * Encodes the specified PanelInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PanelInfo.verify|verify} messages.
+                     * @param message PanelInfo message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.ICompletionInfo, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IPanelInfo, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes a CompletionInfo message from the specified reader or buffer.
+                     * Decodes a PanelInfo message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns CompletionInfo
+                     * @returns PanelInfo
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.CompletionInfo;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.PanelInfo;
 
                     /**
-                     * Decodes a CompletionInfo message from the specified reader or buffer, length delimited.
+                     * Decodes a PanelInfo message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns CompletionInfo
+                     * @returns PanelInfo
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.CompletionInfo;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.PanelInfo;
 
                     /**
-                     * Verifies a CompletionInfo message.
+                     * Verifies a PanelInfo message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates a CompletionInfo message from a plain object. Also converts values to their respective internal types.
+                     * Creates a PanelInfo message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns CompletionInfo
+                     * @returns PanelInfo
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.CompletionInfo;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.PanelInfo;
 
                     /**
-                     * Creates a plain object from a CompletionInfo message. Also converts values to other types if specified.
-                     * @param message CompletionInfo
+                     * Creates a plain object from a PanelInfo message. Also converts values to other types if specified.
+                     * @param message PanelInfo
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.CompletionInfo, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.PanelInfo, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this CompletionInfo to JSON.
+                     * Converts this PanelInfo to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for CompletionInfo
+                     * Gets the default type url for PanelInfo
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                /** Properties of a TransactionInfo. */
-                interface ITransactionInfo {
-
-                    /** TransactionInfo value */
-                    value?: (number|null);
-
-                    /** TransactionInfo currency */
-                    currency?: (string|null);
-
-                    /** TransactionInfo transactionId */
-                    transactionId?: (string|null);
-
-                    /** TransactionInfo tax */
-                    tax?: (number|null);
+                /** Properties of a MediaInfo. */
+                interface IMediaInfo {
 
-                    /** TransactionInfo cost */
-                    cost?: (number|null);
+                    /** MediaInfo mediaProgressDuration */
+                    mediaProgressDuration?: (google.protobuf.IDuration|null);
 
-                    /** TransactionInfo discountValue */
-                    discountValue?: (number|null);
+                    /** MediaInfo mediaProgressPercentage */
+                    mediaProgressPercentage?: (number|null);
                 }
 
-                /** Represents a TransactionInfo. */
-                class TransactionInfo implements ITransactionInfo {
+                /** Represents a MediaInfo. */
+                class MediaInfo implements IMediaInfo {
 
                     /**
-                     * Constructs a new TransactionInfo.
+                     * Constructs a new MediaInfo.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.cloud.discoveryengine.v1.ITransactionInfo);
-
-                    /** TransactionInfo value. */
-                    public value?: (number|null);
-
-                    /** TransactionInfo currency. */
-                    public currency: string;
-
-                    /** TransactionInfo transactionId. */
-                    public transactionId: string;
-
-                    /** TransactionInfo tax. */
-                    public tax?: (number|null);
-
-                    /** TransactionInfo cost. */
-                    public cost?: (number|null);
-
-                    /** TransactionInfo discountValue. */
-                    public discountValue?: (number|null);
-
-                    /** TransactionInfo _value. */
-                    public _value?: "value";
+                    constructor(properties?: google.cloud.discoveryengine.v1.IMediaInfo);
 
-                    /** TransactionInfo _tax. */
-                    public _tax?: "tax";
+                    /** MediaInfo mediaProgressDuration. */
+                    public mediaProgressDuration?: (google.protobuf.IDuration|null);
 
-                    /** TransactionInfo _cost. */
-                    public _cost?: "cost";
+                    /** MediaInfo mediaProgressPercentage. */
+                    public mediaProgressPercentage?: (number|null);
 
-                    /** TransactionInfo _discountValue. */
-                    public _discountValue?: "discountValue";
+                    /** MediaInfo _mediaProgressPercentage. */
+                    public _mediaProgressPercentage?: "mediaProgressPercentage";
 
                     /**
-                     * Creates a new TransactionInfo instance using the specified properties.
+                     * Creates a new MediaInfo instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns TransactionInfo instance
+                     * @returns MediaInfo instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.ITransactionInfo): google.cloud.discoveryengine.v1.TransactionInfo;
+                    public static create(properties?: google.cloud.discoveryengine.v1.IMediaInfo): google.cloud.discoveryengine.v1.MediaInfo;
 
                     /**
-                     * Encodes the specified TransactionInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.TransactionInfo.verify|verify} messages.
-                     * @param message TransactionInfo message or plain object to encode
+                     * Encodes the specified MediaInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.MediaInfo.verify|verify} messages.
+                     * @param message MediaInfo message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.ITransactionInfo, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.IMediaInfo, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified TransactionInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.TransactionInfo.verify|verify} messages.
-                     * @param message TransactionInfo message or plain object to encode
+                     * Encodes the specified MediaInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.MediaInfo.verify|verify} messages.
+                     * @param message MediaInfo message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.ITransactionInfo, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IMediaInfo, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes a TransactionInfo message from the specified reader or buffer.
+                     * Decodes a MediaInfo message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns TransactionInfo
+                     * @returns MediaInfo
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.TransactionInfo;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.MediaInfo;
 
                     /**
-                     * Decodes a TransactionInfo message from the specified reader or buffer, length delimited.
+                     * Decodes a MediaInfo message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns TransactionInfo
+                     * @returns MediaInfo
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.TransactionInfo;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.MediaInfo;
 
                     /**
-                     * Verifies a TransactionInfo message.
+                     * Verifies a MediaInfo message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates a TransactionInfo message from a plain object. Also converts values to their respective internal types.
+                     * Creates a MediaInfo message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns TransactionInfo
+                     * @returns MediaInfo
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.TransactionInfo;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.MediaInfo;
 
                     /**
-                     * Creates a plain object from a TransactionInfo message. Also converts values to other types if specified.
-                     * @param message TransactionInfo
+                     * Creates a plain object from a MediaInfo message. Also converts values to other types if specified.
+                     * @param message MediaInfo
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.TransactionInfo, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.MediaInfo, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this TransactionInfo to JSON.
+                     * Converts this MediaInfo to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for TransactionInfo
+                     * Gets the default type url for MediaInfo
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                /** Properties of a DocumentInfo. */
-                interface IDocumentInfo {
-
-                    /** DocumentInfo id */
-                    id?: (string|null);
-
-                    /** DocumentInfo name */
-                    name?: (string|null);
+                /** Properties of a PurgeDocumentsRequest. */
+                interface IPurgeDocumentsRequest {
 
-                    /** DocumentInfo uri */
-                    uri?: (string|null);
+                    /** PurgeDocumentsRequest parent */
+                    parent?: (string|null);
 
-                    /** DocumentInfo quantity */
-                    quantity?: (number|null);
+                    /** PurgeDocumentsRequest filter */
+                    filter?: (string|null);
 
-                    /** DocumentInfo promotionIds */
-                    promotionIds?: (string[]|null);
+                    /** PurgeDocumentsRequest force */
+                    force?: (boolean|null);
                 }
 
-                /** Represents a DocumentInfo. */
-                class DocumentInfo implements IDocumentInfo {
+                /** Represents a PurgeDocumentsRequest. */
+                class PurgeDocumentsRequest implements IPurgeDocumentsRequest {
 
                     /**
-                     * Constructs a new DocumentInfo.
+                     * Constructs a new PurgeDocumentsRequest.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.cloud.discoveryengine.v1.IDocumentInfo);
-
-                    /** DocumentInfo id. */
-                    public id?: (string|null);
-
-                    /** DocumentInfo name. */
-                    public name?: (string|null);
-
-                    /** DocumentInfo uri. */
-                    public uri?: (string|null);
-
-                    /** DocumentInfo quantity. */
-                    public quantity?: (number|null);
+                    constructor(properties?: google.cloud.discoveryengine.v1.IPurgeDocumentsRequest);
 
-                    /** DocumentInfo promotionIds. */
-                    public promotionIds: string[];
+                    /** PurgeDocumentsRequest parent. */
+                    public parent: string;
 
-                    /** DocumentInfo documentDescriptor. */
-                    public documentDescriptor?: ("id"|"name"|"uri");
+                    /** PurgeDocumentsRequest filter. */
+                    public filter: string;
 
-                    /** DocumentInfo _quantity. */
-                    public _quantity?: "quantity";
+                    /** PurgeDocumentsRequest force. */
+                    public force: boolean;
 
                     /**
-                     * Creates a new DocumentInfo instance using the specified properties.
+                     * Creates a new PurgeDocumentsRequest instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns DocumentInfo instance
+                     * @returns PurgeDocumentsRequest instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.IDocumentInfo): google.cloud.discoveryengine.v1.DocumentInfo;
+                    public static create(properties?: google.cloud.discoveryengine.v1.IPurgeDocumentsRequest): google.cloud.discoveryengine.v1.PurgeDocumentsRequest;
 
                     /**
-                     * Encodes the specified DocumentInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentInfo.verify|verify} messages.
-                     * @param message DocumentInfo message or plain object to encode
+                     * Encodes the specified PurgeDocumentsRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsRequest.verify|verify} messages.
+                     * @param message PurgeDocumentsRequest message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.IDocumentInfo, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.IPurgeDocumentsRequest, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified DocumentInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentInfo.verify|verify} messages.
-                     * @param message DocumentInfo message or plain object to encode
+                     * Encodes the specified PurgeDocumentsRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsRequest.verify|verify} messages.
+                     * @param message PurgeDocumentsRequest message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IDocumentInfo, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IPurgeDocumentsRequest, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes a DocumentInfo message from the specified reader or buffer.
+                     * Decodes a PurgeDocumentsRequest message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns DocumentInfo
+                     * @returns PurgeDocumentsRequest
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.DocumentInfo;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.PurgeDocumentsRequest;
 
                     /**
-                     * Decodes a DocumentInfo message from the specified reader or buffer, length delimited.
+                     * Decodes a PurgeDocumentsRequest message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns DocumentInfo
+                     * @returns PurgeDocumentsRequest
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.DocumentInfo;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.PurgeDocumentsRequest;
 
                     /**
-                     * Verifies a DocumentInfo message.
+                     * Verifies a PurgeDocumentsRequest message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates a DocumentInfo message from a plain object. Also converts values to their respective internal types.
+                     * Creates a PurgeDocumentsRequest message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns DocumentInfo
+                     * @returns PurgeDocumentsRequest
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.DocumentInfo;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.PurgeDocumentsRequest;
 
                     /**
-                     * Creates a plain object from a DocumentInfo message. Also converts values to other types if specified.
-                     * @param message DocumentInfo
+                     * Creates a plain object from a PurgeDocumentsRequest message. Also converts values to other types if specified.
+                     * @param message PurgeDocumentsRequest
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.DocumentInfo, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.PurgeDocumentsRequest, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this DocumentInfo to JSON.
+                     * Converts this PurgeDocumentsRequest to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for DocumentInfo
+                     * Gets the default type url for PurgeDocumentsRequest
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                /** Properties of a PanelInfo. */
-                interface IPanelInfo {
-
-                    /** PanelInfo panelId */
-                    panelId?: (string|null);
-
-                    /** PanelInfo displayName */
-                    displayName?: (string|null);
+                /** Properties of a PurgeDocumentsResponse. */
+                interface IPurgeDocumentsResponse {
 
-                    /** PanelInfo panelPosition */
-                    panelPosition?: (number|null);
+                    /** PurgeDocumentsResponse purgeCount */
+                    purgeCount?: (number|Long|string|null);
 
-                    /** PanelInfo totalPanels */
-                    totalPanels?: (number|null);
+                    /** PurgeDocumentsResponse purgeSample */
+                    purgeSample?: (string[]|null);
                 }
 
-                /** Represents a PanelInfo. */
-                class PanelInfo implements IPanelInfo {
+                /** Represents a PurgeDocumentsResponse. */
+                class PurgeDocumentsResponse implements IPurgeDocumentsResponse {
 
                     /**
-                     * Constructs a new PanelInfo.
+                     * Constructs a new PurgeDocumentsResponse.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.cloud.discoveryengine.v1.IPanelInfo);
-
-                    /** PanelInfo panelId. */
-                    public panelId: string;
-
-                    /** PanelInfo displayName. */
-                    public displayName: string;
-
-                    /** PanelInfo panelPosition. */
-                    public panelPosition?: (number|null);
-
-                    /** PanelInfo totalPanels. */
-                    public totalPanels?: (number|null);
+                    constructor(properties?: google.cloud.discoveryengine.v1.IPurgeDocumentsResponse);
 
-                    /** PanelInfo _panelPosition. */
-                    public _panelPosition?: "panelPosition";
+                    /** PurgeDocumentsResponse purgeCount. */
+                    public purgeCount: (number|Long|string);
 
-                    /** PanelInfo _totalPanels. */
-                    public _totalPanels?: "totalPanels";
+                    /** PurgeDocumentsResponse purgeSample. */
+                    public purgeSample: string[];
 
                     /**
-                     * Creates a new PanelInfo instance using the specified properties.
+                     * Creates a new PurgeDocumentsResponse instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns PanelInfo instance
+                     * @returns PurgeDocumentsResponse instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.IPanelInfo): google.cloud.discoveryengine.v1.PanelInfo;
+                    public static create(properties?: google.cloud.discoveryengine.v1.IPurgeDocumentsResponse): google.cloud.discoveryengine.v1.PurgeDocumentsResponse;
 
                     /**
-                     * Encodes the specified PanelInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.PanelInfo.verify|verify} messages.
-                     * @param message PanelInfo message or plain object to encode
+                     * Encodes the specified PurgeDocumentsResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsResponse.verify|verify} messages.
+                     * @param message PurgeDocumentsResponse message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.IPanelInfo, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.IPurgeDocumentsResponse, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified PanelInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PanelInfo.verify|verify} messages.
-                     * @param message PanelInfo message or plain object to encode
+                     * Encodes the specified PurgeDocumentsResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsResponse.verify|verify} messages.
+                     * @param message PurgeDocumentsResponse message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IPanelInfo, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IPurgeDocumentsResponse, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes a PanelInfo message from the specified reader or buffer.
+                     * Decodes a PurgeDocumentsResponse message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns PanelInfo
+                     * @returns PurgeDocumentsResponse
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.PanelInfo;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.PurgeDocumentsResponse;
 
                     /**
-                     * Decodes a PanelInfo message from the specified reader or buffer, length delimited.
+                     * Decodes a PurgeDocumentsResponse message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns PanelInfo
+                     * @returns PurgeDocumentsResponse
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.PanelInfo;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.PurgeDocumentsResponse;
 
                     /**
-                     * Verifies a PanelInfo message.
+                     * Verifies a PurgeDocumentsResponse message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates a PanelInfo message from a plain object. Also converts values to their respective internal types.
+                     * Creates a PurgeDocumentsResponse message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns PanelInfo
+                     * @returns PurgeDocumentsResponse
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.PanelInfo;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.PurgeDocumentsResponse;
 
                     /**
-                     * Creates a plain object from a PanelInfo message. Also converts values to other types if specified.
-                     * @param message PanelInfo
+                     * Creates a plain object from a PurgeDocumentsResponse message. Also converts values to other types if specified.
+                     * @param message PurgeDocumentsResponse
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.PanelInfo, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.PurgeDocumentsResponse, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this PanelInfo to JSON.
+                     * Converts this PurgeDocumentsResponse to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for PanelInfo
+                     * Gets the default type url for PurgeDocumentsResponse
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                /** Properties of a MediaInfo. */
-                interface IMediaInfo {
+                /** Properties of a PurgeDocumentsMetadata. */
+                interface IPurgeDocumentsMetadata {
 
-                    /** MediaInfo mediaProgressDuration */
-                    mediaProgressDuration?: (google.protobuf.IDuration|null);
+                    /** PurgeDocumentsMetadata createTime */
+                    createTime?: (google.protobuf.ITimestamp|null);
 
-                    /** MediaInfo mediaProgressPercentage */
-                    mediaProgressPercentage?: (number|null);
+                    /** PurgeDocumentsMetadata updateTime */
+                    updateTime?: (google.protobuf.ITimestamp|null);
+
+                    /** PurgeDocumentsMetadata successCount */
+                    successCount?: (number|Long|string|null);
+
+                    /** PurgeDocumentsMetadata failureCount */
+                    failureCount?: (number|Long|string|null);
+
+                    /** PurgeDocumentsMetadata ignoredCount */
+                    ignoredCount?: (number|Long|string|null);
                 }
 
-                /** Represents a MediaInfo. */
-                class MediaInfo implements IMediaInfo {
+                /** Represents a PurgeDocumentsMetadata. */
+                class PurgeDocumentsMetadata implements IPurgeDocumentsMetadata {
 
                     /**
-                     * Constructs a new MediaInfo.
+                     * Constructs a new PurgeDocumentsMetadata.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.cloud.discoveryengine.v1.IMediaInfo);
+                    constructor(properties?: google.cloud.discoveryengine.v1.IPurgeDocumentsMetadata);
+
+                    /** PurgeDocumentsMetadata createTime. */
+                    public createTime?: (google.protobuf.ITimestamp|null);
+
+                    /** PurgeDocumentsMetadata updateTime. */
+                    public updateTime?: (google.protobuf.ITimestamp|null);
 
-                    /** MediaInfo mediaProgressDuration. */
-                    public mediaProgressDuration?: (google.protobuf.IDuration|null);
+                    /** PurgeDocumentsMetadata successCount. */
+                    public successCount: (number|Long|string);
 
-                    /** MediaInfo mediaProgressPercentage. */
-                    public mediaProgressPercentage?: (number|null);
+                    /** PurgeDocumentsMetadata failureCount. */
+                    public failureCount: (number|Long|string);
 
-                    /** MediaInfo _mediaProgressPercentage. */
-                    public _mediaProgressPercentage?: "mediaProgressPercentage";
+                    /** PurgeDocumentsMetadata ignoredCount. */
+                    public ignoredCount: (number|Long|string);
 
                     /**
-                     * Creates a new MediaInfo instance using the specified properties.
+                     * Creates a new PurgeDocumentsMetadata instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns MediaInfo instance
+                     * @returns PurgeDocumentsMetadata instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.IMediaInfo): google.cloud.discoveryengine.v1.MediaInfo;
+                    public static create(properties?: google.cloud.discoveryengine.v1.IPurgeDocumentsMetadata): google.cloud.discoveryengine.v1.PurgeDocumentsMetadata;
 
                     /**
-                     * Encodes the specified MediaInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.MediaInfo.verify|verify} messages.
-                     * @param message MediaInfo message or plain object to encode
+                     * Encodes the specified PurgeDocumentsMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsMetadata.verify|verify} messages.
+                     * @param message PurgeDocumentsMetadata message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.IMediaInfo, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.IPurgeDocumentsMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified MediaInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.MediaInfo.verify|verify} messages.
-                     * @param message MediaInfo message or plain object to encode
+                     * Encodes the specified PurgeDocumentsMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsMetadata.verify|verify} messages.
+                     * @param message PurgeDocumentsMetadata message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IMediaInfo, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IPurgeDocumentsMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes a MediaInfo message from the specified reader or buffer.
+                     * Decodes a PurgeDocumentsMetadata message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns MediaInfo
+                     * @returns PurgeDocumentsMetadata
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.MediaInfo;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.PurgeDocumentsMetadata;
 
                     /**
-                     * Decodes a MediaInfo message from the specified reader or buffer, length delimited.
+                     * Decodes a PurgeDocumentsMetadata message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns MediaInfo
+                     * @returns PurgeDocumentsMetadata
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.MediaInfo;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.PurgeDocumentsMetadata;
 
                     /**
-                     * Verifies a MediaInfo message.
+                     * Verifies a PurgeDocumentsMetadata message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates a MediaInfo message from a plain object. Also converts values to their respective internal types.
+                     * Creates a PurgeDocumentsMetadata message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns MediaInfo
+                     * @returns PurgeDocumentsMetadata
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.MediaInfo;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.PurgeDocumentsMetadata;
 
                     /**
-                     * Creates a plain object from a MediaInfo message. Also converts values to other types if specified.
-                     * @param message MediaInfo
+                     * Creates a plain object from a PurgeDocumentsMetadata message. Also converts values to other types if specified.
+                     * @param message PurgeDocumentsMetadata
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.MediaInfo, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.PurgeDocumentsMetadata, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this MediaInfo to JSON.
+                     * Converts this PurgeDocumentsMetadata to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for MediaInfo
+                     * Gets the default type url for PurgeDocumentsMetadata
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                /** Properties of a PurgeDocumentsRequest. */
-                interface IPurgeDocumentsRequest {
+                /** Properties of a PurgeSuggestionDenyListEntriesRequest. */
+                interface IPurgeSuggestionDenyListEntriesRequest {
 
-                    /** PurgeDocumentsRequest parent */
+                    /** PurgeSuggestionDenyListEntriesRequest parent */
                     parent?: (string|null);
-
-                    /** PurgeDocumentsRequest filter */
-                    filter?: (string|null);
-
-                    /** PurgeDocumentsRequest force */
-                    force?: (boolean|null);
                 }
 
-                /** Represents a PurgeDocumentsRequest. */
-                class PurgeDocumentsRequest implements IPurgeDocumentsRequest {
+                /** Represents a PurgeSuggestionDenyListEntriesRequest. */
+                class PurgeSuggestionDenyListEntriesRequest implements IPurgeSuggestionDenyListEntriesRequest {
 
                     /**
-                     * Constructs a new PurgeDocumentsRequest.
+                     * Constructs a new PurgeSuggestionDenyListEntriesRequest.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.cloud.discoveryengine.v1.IPurgeDocumentsRequest);
+                    constructor(properties?: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesRequest);
 
-                    /** PurgeDocumentsRequest parent. */
+                    /** PurgeSuggestionDenyListEntriesRequest parent. */
                     public parent: string;
 
-                    /** PurgeDocumentsRequest filter. */
-                    public filter: string;
-
-                    /** PurgeDocumentsRequest force. */
-                    public force: boolean;
-
                     /**
-                     * Creates a new PurgeDocumentsRequest instance using the specified properties.
+                     * Creates a new PurgeSuggestionDenyListEntriesRequest instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns PurgeDocumentsRequest instance
+                     * @returns PurgeSuggestionDenyListEntriesRequest instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.IPurgeDocumentsRequest): google.cloud.discoveryengine.v1.PurgeDocumentsRequest;
+                    public static create(properties?: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesRequest): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest;
 
                     /**
-                     * Encodes the specified PurgeDocumentsRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsRequest.verify|verify} messages.
-                     * @param message PurgeDocumentsRequest message or plain object to encode
+                     * Encodes the specified PurgeSuggestionDenyListEntriesRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest.verify|verify} messages.
+                     * @param message PurgeSuggestionDenyListEntriesRequest message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.IPurgeDocumentsRequest, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesRequest, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified PurgeDocumentsRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsRequest.verify|verify} messages.
-                     * @param message PurgeDocumentsRequest message or plain object to encode
+                     * Encodes the specified PurgeSuggestionDenyListEntriesRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest.verify|verify} messages.
+                     * @param message PurgeSuggestionDenyListEntriesRequest message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IPurgeDocumentsRequest, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesRequest, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes a PurgeDocumentsRequest message from the specified reader or buffer.
+                     * Decodes a PurgeSuggestionDenyListEntriesRequest message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns PurgeDocumentsRequest
+                     * @returns PurgeSuggestionDenyListEntriesRequest
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.PurgeDocumentsRequest;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest;
 
                     /**
-                     * Decodes a PurgeDocumentsRequest message from the specified reader or buffer, length delimited.
+                     * Decodes a PurgeSuggestionDenyListEntriesRequest message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns PurgeDocumentsRequest
+                     * @returns PurgeSuggestionDenyListEntriesRequest
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.PurgeDocumentsRequest;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest;
 
                     /**
-                     * Verifies a PurgeDocumentsRequest message.
+                     * Verifies a PurgeSuggestionDenyListEntriesRequest message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates a PurgeDocumentsRequest message from a plain object. Also converts values to their respective internal types.
+                     * Creates a PurgeSuggestionDenyListEntriesRequest message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns PurgeDocumentsRequest
+                     * @returns PurgeSuggestionDenyListEntriesRequest
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.PurgeDocumentsRequest;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest;
 
                     /**
-                     * Creates a plain object from a PurgeDocumentsRequest message. Also converts values to other types if specified.
-                     * @param message PurgeDocumentsRequest
+                     * Creates a plain object from a PurgeSuggestionDenyListEntriesRequest message. Also converts values to other types if specified.
+                     * @param message PurgeSuggestionDenyListEntriesRequest
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.PurgeDocumentsRequest, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this PurgeDocumentsRequest to JSON.
+                     * Converts this PurgeSuggestionDenyListEntriesRequest to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for PurgeDocumentsRequest
+                     * Gets the default type url for PurgeSuggestionDenyListEntriesRequest
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                /** Properties of a PurgeDocumentsResponse. */
-                interface IPurgeDocumentsResponse {
+                /** Properties of a PurgeSuggestionDenyListEntriesResponse. */
+                interface IPurgeSuggestionDenyListEntriesResponse {
 
-                    /** PurgeDocumentsResponse purgeCount */
+                    /** PurgeSuggestionDenyListEntriesResponse purgeCount */
                     purgeCount?: (number|Long|string|null);
 
-                    /** PurgeDocumentsResponse purgeSample */
-                    purgeSample?: (string[]|null);
+                    /** PurgeSuggestionDenyListEntriesResponse errorSamples */
+                    errorSamples?: (google.rpc.IStatus[]|null);
                 }
 
-                /** Represents a PurgeDocumentsResponse. */
-                class PurgeDocumentsResponse implements IPurgeDocumentsResponse {
+                /** Represents a PurgeSuggestionDenyListEntriesResponse. */
+                class PurgeSuggestionDenyListEntriesResponse implements IPurgeSuggestionDenyListEntriesResponse {
 
                     /**
-                     * Constructs a new PurgeDocumentsResponse.
+                     * Constructs a new PurgeSuggestionDenyListEntriesResponse.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.cloud.discoveryengine.v1.IPurgeDocumentsResponse);
+                    constructor(properties?: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesResponse);
 
-                    /** PurgeDocumentsResponse purgeCount. */
+                    /** PurgeSuggestionDenyListEntriesResponse purgeCount. */
                     public purgeCount: (number|Long|string);
 
-                    /** PurgeDocumentsResponse purgeSample. */
-                    public purgeSample: string[];
+                    /** PurgeSuggestionDenyListEntriesResponse errorSamples. */
+                    public errorSamples: google.rpc.IStatus[];
 
                     /**
-                     * Creates a new PurgeDocumentsResponse instance using the specified properties.
+                     * Creates a new PurgeSuggestionDenyListEntriesResponse instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns PurgeDocumentsResponse instance
+                     * @returns PurgeSuggestionDenyListEntriesResponse instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.IPurgeDocumentsResponse): google.cloud.discoveryengine.v1.PurgeDocumentsResponse;
+                    public static create(properties?: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesResponse): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse;
 
                     /**
-                     * Encodes the specified PurgeDocumentsResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsResponse.verify|verify} messages.
-                     * @param message PurgeDocumentsResponse message or plain object to encode
+                     * Encodes the specified PurgeSuggestionDenyListEntriesResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse.verify|verify} messages.
+                     * @param message PurgeSuggestionDenyListEntriesResponse message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.IPurgeDocumentsResponse, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesResponse, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified PurgeDocumentsResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsResponse.verify|verify} messages.
-                     * @param message PurgeDocumentsResponse message or plain object to encode
+                     * Encodes the specified PurgeSuggestionDenyListEntriesResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse.verify|verify} messages.
+                     * @param message PurgeSuggestionDenyListEntriesResponse message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IPurgeDocumentsResponse, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesResponse, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes a PurgeDocumentsResponse message from the specified reader or buffer.
+                     * Decodes a PurgeSuggestionDenyListEntriesResponse message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns PurgeDocumentsResponse
+                     * @returns PurgeSuggestionDenyListEntriesResponse
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.PurgeDocumentsResponse;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse;
 
                     /**
-                     * Decodes a PurgeDocumentsResponse message from the specified reader or buffer, length delimited.
+                     * Decodes a PurgeSuggestionDenyListEntriesResponse message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns PurgeDocumentsResponse
+                     * @returns PurgeSuggestionDenyListEntriesResponse
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.PurgeDocumentsResponse;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse;
 
                     /**
-                     * Verifies a PurgeDocumentsResponse message.
+                     * Verifies a PurgeSuggestionDenyListEntriesResponse message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates a PurgeDocumentsResponse message from a plain object. Also converts values to their respective internal types.
+                     * Creates a PurgeSuggestionDenyListEntriesResponse message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns PurgeDocumentsResponse
+                     * @returns PurgeSuggestionDenyListEntriesResponse
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.PurgeDocumentsResponse;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse;
 
                     /**
-                     * Creates a plain object from a PurgeDocumentsResponse message. Also converts values to other types if specified.
-                     * @param message PurgeDocumentsResponse
+                     * Creates a plain object from a PurgeSuggestionDenyListEntriesResponse message. Also converts values to other types if specified.
+                     * @param message PurgeSuggestionDenyListEntriesResponse
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.PurgeDocumentsResponse, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this PurgeDocumentsResponse to JSON.
+                     * Converts this PurgeSuggestionDenyListEntriesResponse to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for PurgeDocumentsResponse
+                     * Gets the default type url for PurgeSuggestionDenyListEntriesResponse
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                /** Properties of a PurgeDocumentsMetadata. */
-                interface IPurgeDocumentsMetadata {
+                /** Properties of a PurgeSuggestionDenyListEntriesMetadata. */
+                interface IPurgeSuggestionDenyListEntriesMetadata {
 
-                    /** PurgeDocumentsMetadata createTime */
+                    /** PurgeSuggestionDenyListEntriesMetadata createTime */
                     createTime?: (google.protobuf.ITimestamp|null);
 
-                    /** PurgeDocumentsMetadata updateTime */
+                    /** PurgeSuggestionDenyListEntriesMetadata updateTime */
                     updateTime?: (google.protobuf.ITimestamp|null);
-
-                    /** PurgeDocumentsMetadata successCount */
-                    successCount?: (number|Long|string|null);
-
-                    /** PurgeDocumentsMetadata failureCount */
-                    failureCount?: (number|Long|string|null);
-
-                    /** PurgeDocumentsMetadata ignoredCount */
-                    ignoredCount?: (number|Long|string|null);
                 }
 
-                /** Represents a PurgeDocumentsMetadata. */
-                class PurgeDocumentsMetadata implements IPurgeDocumentsMetadata {
+                /** Represents a PurgeSuggestionDenyListEntriesMetadata. */
+                class PurgeSuggestionDenyListEntriesMetadata implements IPurgeSuggestionDenyListEntriesMetadata {
 
                     /**
-                     * Constructs a new PurgeDocumentsMetadata.
+                     * Constructs a new PurgeSuggestionDenyListEntriesMetadata.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.cloud.discoveryengine.v1.IPurgeDocumentsMetadata);
+                    constructor(properties?: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesMetadata);
 
-                    /** PurgeDocumentsMetadata createTime. */
+                    /** PurgeSuggestionDenyListEntriesMetadata createTime. */
                     public createTime?: (google.protobuf.ITimestamp|null);
 
-                    /** PurgeDocumentsMetadata updateTime. */
+                    /** PurgeSuggestionDenyListEntriesMetadata updateTime. */
                     public updateTime?: (google.protobuf.ITimestamp|null);
 
-                    /** PurgeDocumentsMetadata successCount. */
-                    public successCount: (number|Long|string);
-
-                    /** PurgeDocumentsMetadata failureCount. */
-                    public failureCount: (number|Long|string);
-
-                    /** PurgeDocumentsMetadata ignoredCount. */
-                    public ignoredCount: (number|Long|string);
-
                     /**
-                     * Creates a new PurgeDocumentsMetadata instance using the specified properties.
+                     * Creates a new PurgeSuggestionDenyListEntriesMetadata instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns PurgeDocumentsMetadata instance
+                     * @returns PurgeSuggestionDenyListEntriesMetadata instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.IPurgeDocumentsMetadata): google.cloud.discoveryengine.v1.PurgeDocumentsMetadata;
+                    public static create(properties?: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesMetadata): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata;
 
-                    /**
-                     * Encodes the specified PurgeDocumentsMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsMetadata.verify|verify} messages.
-                     * @param message PurgeDocumentsMetadata message or plain object to encode
+                    /**
+                     * Encodes the specified PurgeSuggestionDenyListEntriesMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata.verify|verify} messages.
+                     * @param message PurgeSuggestionDenyListEntriesMetadata message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.IPurgeDocumentsMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified PurgeDocumentsMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsMetadata.verify|verify} messages.
-                     * @param message PurgeDocumentsMetadata message or plain object to encode
+                     * Encodes the specified PurgeSuggestionDenyListEntriesMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata.verify|verify} messages.
+                     * @param message PurgeSuggestionDenyListEntriesMetadata message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IPurgeDocumentsMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes a PurgeDocumentsMetadata message from the specified reader or buffer.
+                     * Decodes a PurgeSuggestionDenyListEntriesMetadata message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns PurgeDocumentsMetadata
+                     * @returns PurgeSuggestionDenyListEntriesMetadata
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.PurgeDocumentsMetadata;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata;
 
                     /**
-                     * Decodes a PurgeDocumentsMetadata message from the specified reader or buffer, length delimited.
+                     * Decodes a PurgeSuggestionDenyListEntriesMetadata message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns PurgeDocumentsMetadata
+                     * @returns PurgeSuggestionDenyListEntriesMetadata
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.PurgeDocumentsMetadata;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata;
 
                     /**
-                     * Verifies a PurgeDocumentsMetadata message.
+                     * Verifies a PurgeSuggestionDenyListEntriesMetadata message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates a PurgeDocumentsMetadata message from a plain object. Also converts values to their respective internal types.
+                     * Creates a PurgeSuggestionDenyListEntriesMetadata message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns PurgeDocumentsMetadata
+                     * @returns PurgeSuggestionDenyListEntriesMetadata
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.PurgeDocumentsMetadata;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata;
 
                     /**
-                     * Creates a plain object from a PurgeDocumentsMetadata message. Also converts values to other types if specified.
-                     * @param message PurgeDocumentsMetadata
+                     * Creates a plain object from a PurgeSuggestionDenyListEntriesMetadata message. Also converts values to other types if specified.
+                     * @param message PurgeSuggestionDenyListEntriesMetadata
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.PurgeDocumentsMetadata, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this PurgeDocumentsMetadata to JSON.
+                     * Converts this PurgeSuggestionDenyListEntriesMetadata to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for PurgeDocumentsMetadata
+                     * Gets the default type url for PurgeSuggestionDenyListEntriesMetadata
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                /** Properties of a PurgeSuggestionDenyListEntriesRequest. */
-                interface IPurgeSuggestionDenyListEntriesRequest {
+                /** Properties of a PurgeCompletionSuggestionsRequest. */
+                interface IPurgeCompletionSuggestionsRequest {
 
-                    /** PurgeSuggestionDenyListEntriesRequest parent */
+                    /** PurgeCompletionSuggestionsRequest parent */
                     parent?: (string|null);
                 }
 
-                /** Represents a PurgeSuggestionDenyListEntriesRequest. */
-                class PurgeSuggestionDenyListEntriesRequest implements IPurgeSuggestionDenyListEntriesRequest {
+                /** Represents a PurgeCompletionSuggestionsRequest. */
+                class PurgeCompletionSuggestionsRequest implements IPurgeCompletionSuggestionsRequest {
 
                     /**
-                     * Constructs a new PurgeSuggestionDenyListEntriesRequest.
+                     * Constructs a new PurgeCompletionSuggestionsRequest.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesRequest);
+                    constructor(properties?: google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsRequest);
 
-                    /** PurgeSuggestionDenyListEntriesRequest parent. */
+                    /** PurgeCompletionSuggestionsRequest parent. */
                     public parent: string;
 
                     /**
-                     * Creates a new PurgeSuggestionDenyListEntriesRequest instance using the specified properties.
+                     * Creates a new PurgeCompletionSuggestionsRequest instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns PurgeSuggestionDenyListEntriesRequest instance
+                     * @returns PurgeCompletionSuggestionsRequest instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesRequest): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest;
+                    public static create(properties?: google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsRequest): google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest;
 
                     /**
-                     * Encodes the specified PurgeSuggestionDenyListEntriesRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest.verify|verify} messages.
-                     * @param message PurgeSuggestionDenyListEntriesRequest message or plain object to encode
+                     * Encodes the specified PurgeCompletionSuggestionsRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest.verify|verify} messages.
+                     * @param message PurgeCompletionSuggestionsRequest message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesRequest, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsRequest, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified PurgeSuggestionDenyListEntriesRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest.verify|verify} messages.
-                     * @param message PurgeSuggestionDenyListEntriesRequest message or plain object to encode
+                     * Encodes the specified PurgeCompletionSuggestionsRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest.verify|verify} messages.
+                     * @param message PurgeCompletionSuggestionsRequest message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesRequest, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsRequest, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes a PurgeSuggestionDenyListEntriesRequest message from the specified reader or buffer.
+                     * Decodes a PurgeCompletionSuggestionsRequest message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns PurgeSuggestionDenyListEntriesRequest
+                     * @returns PurgeCompletionSuggestionsRequest
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest;
 
                     /**
-                     * Decodes a PurgeSuggestionDenyListEntriesRequest message from the specified reader or buffer, length delimited.
+                     * Decodes a PurgeCompletionSuggestionsRequest message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns PurgeSuggestionDenyListEntriesRequest
+                     * @returns PurgeCompletionSuggestionsRequest
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest;
 
                     /**
-                     * Verifies a PurgeSuggestionDenyListEntriesRequest message.
+                     * Verifies a PurgeCompletionSuggestionsRequest message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates a PurgeSuggestionDenyListEntriesRequest message from a plain object. Also converts values to their respective internal types.
+                     * Creates a PurgeCompletionSuggestionsRequest message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns PurgeSuggestionDenyListEntriesRequest
+                     * @returns PurgeCompletionSuggestionsRequest
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest;
 
                     /**
-                     * Creates a plain object from a PurgeSuggestionDenyListEntriesRequest message. Also converts values to other types if specified.
-                     * @param message PurgeSuggestionDenyListEntriesRequest
+                     * Creates a plain object from a PurgeCompletionSuggestionsRequest message. Also converts values to other types if specified.
+                     * @param message PurgeCompletionSuggestionsRequest
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this PurgeSuggestionDenyListEntriesRequest to JSON.
+                     * Converts this PurgeCompletionSuggestionsRequest to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for PurgeSuggestionDenyListEntriesRequest
+                     * Gets the default type url for PurgeCompletionSuggestionsRequest
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                /** Properties of a PurgeSuggestionDenyListEntriesResponse. */
-                interface IPurgeSuggestionDenyListEntriesResponse {
+                /** Properties of a PurgeCompletionSuggestionsResponse. */
+                interface IPurgeCompletionSuggestionsResponse {
 
-                    /** PurgeSuggestionDenyListEntriesResponse purgeCount */
-                    purgeCount?: (number|Long|string|null);
+                    /** PurgeCompletionSuggestionsResponse purgeSucceeded */
+                    purgeSucceeded?: (boolean|null);
 
-                    /** PurgeSuggestionDenyListEntriesResponse errorSamples */
+                    /** PurgeCompletionSuggestionsResponse errorSamples */
                     errorSamples?: (google.rpc.IStatus[]|null);
                 }
 
-                /** Represents a PurgeSuggestionDenyListEntriesResponse. */
-                class PurgeSuggestionDenyListEntriesResponse implements IPurgeSuggestionDenyListEntriesResponse {
+                /** Represents a PurgeCompletionSuggestionsResponse. */
+                class PurgeCompletionSuggestionsResponse implements IPurgeCompletionSuggestionsResponse {
 
                     /**
-                     * Constructs a new PurgeSuggestionDenyListEntriesResponse.
+                     * Constructs a new PurgeCompletionSuggestionsResponse.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesResponse);
+                    constructor(properties?: google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsResponse);
 
-                    /** PurgeSuggestionDenyListEntriesResponse purgeCount. */
-                    public purgeCount: (number|Long|string);
+                    /** PurgeCompletionSuggestionsResponse purgeSucceeded. */
+                    public purgeSucceeded: boolean;
 
-                    /** PurgeSuggestionDenyListEntriesResponse errorSamples. */
+                    /** PurgeCompletionSuggestionsResponse errorSamples. */
                     public errorSamples: google.rpc.IStatus[];
 
                     /**
-                     * Creates a new PurgeSuggestionDenyListEntriesResponse instance using the specified properties.
+                     * Creates a new PurgeCompletionSuggestionsResponse instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns PurgeSuggestionDenyListEntriesResponse instance
+                     * @returns PurgeCompletionSuggestionsResponse instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesResponse): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse;
+                    public static create(properties?: google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsResponse): google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse;
 
                     /**
-                     * Encodes the specified PurgeSuggestionDenyListEntriesResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse.verify|verify} messages.
-                     * @param message PurgeSuggestionDenyListEntriesResponse message or plain object to encode
+                     * Encodes the specified PurgeCompletionSuggestionsResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse.verify|verify} messages.
+                     * @param message PurgeCompletionSuggestionsResponse message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesResponse, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsResponse, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified PurgeSuggestionDenyListEntriesResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse.verify|verify} messages.
-                     * @param message PurgeSuggestionDenyListEntriesResponse message or plain object to encode
+                     * Encodes the specified PurgeCompletionSuggestionsResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse.verify|verify} messages.
+                     * @param message PurgeCompletionSuggestionsResponse message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesResponse, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsResponse, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes a PurgeSuggestionDenyListEntriesResponse message from the specified reader or buffer.
+                     * Decodes a PurgeCompletionSuggestionsResponse message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns PurgeSuggestionDenyListEntriesResponse
+                     * @returns PurgeCompletionSuggestionsResponse
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse;
 
                     /**
-                     * Decodes a PurgeSuggestionDenyListEntriesResponse message from the specified reader or buffer, length delimited.
+                     * Decodes a PurgeCompletionSuggestionsResponse message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns PurgeSuggestionDenyListEntriesResponse
+                     * @returns PurgeCompletionSuggestionsResponse
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse;
 
                     /**
-                     * Verifies a PurgeSuggestionDenyListEntriesResponse message.
+                     * Verifies a PurgeCompletionSuggestionsResponse message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates a PurgeSuggestionDenyListEntriesResponse message from a plain object. Also converts values to their respective internal types.
+                     * Creates a PurgeCompletionSuggestionsResponse message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns PurgeSuggestionDenyListEntriesResponse
+                     * @returns PurgeCompletionSuggestionsResponse
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse;
 
                     /**
-                     * Creates a plain object from a PurgeSuggestionDenyListEntriesResponse message. Also converts values to other types if specified.
-                     * @param message PurgeSuggestionDenyListEntriesResponse
+                     * Creates a plain object from a PurgeCompletionSuggestionsResponse message. Also converts values to other types if specified.
+                     * @param message PurgeCompletionSuggestionsResponse
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this PurgeSuggestionDenyListEntriesResponse to JSON.
+                     * Converts this PurgeCompletionSuggestionsResponse to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for PurgeSuggestionDenyListEntriesResponse
+                     * Gets the default type url for PurgeCompletionSuggestionsResponse
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                /** Properties of a PurgeSuggestionDenyListEntriesMetadata. */
-                interface IPurgeSuggestionDenyListEntriesMetadata {
+                /** Properties of a PurgeCompletionSuggestionsMetadata. */
+                interface IPurgeCompletionSuggestionsMetadata {
 
-                    /** PurgeSuggestionDenyListEntriesMetadata createTime */
+                    /** PurgeCompletionSuggestionsMetadata createTime */
                     createTime?: (google.protobuf.ITimestamp|null);
 
-                    /** PurgeSuggestionDenyListEntriesMetadata updateTime */
+                    /** PurgeCompletionSuggestionsMetadata updateTime */
                     updateTime?: (google.protobuf.ITimestamp|null);
                 }
 
-                /** Represents a PurgeSuggestionDenyListEntriesMetadata. */
-                class PurgeSuggestionDenyListEntriesMetadata implements IPurgeSuggestionDenyListEntriesMetadata {
+                /** Represents a PurgeCompletionSuggestionsMetadata. */
+                class PurgeCompletionSuggestionsMetadata implements IPurgeCompletionSuggestionsMetadata {
 
                     /**
-                     * Constructs a new PurgeSuggestionDenyListEntriesMetadata.
+                     * Constructs a new PurgeCompletionSuggestionsMetadata.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesMetadata);
+                    constructor(properties?: google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsMetadata);
 
-                    /** PurgeSuggestionDenyListEntriesMetadata createTime. */
+                    /** PurgeCompletionSuggestionsMetadata createTime. */
                     public createTime?: (google.protobuf.ITimestamp|null);
 
-                    /** PurgeSuggestionDenyListEntriesMetadata updateTime. */
+                    /** PurgeCompletionSuggestionsMetadata updateTime. */
                     public updateTime?: (google.protobuf.ITimestamp|null);
 
                     /**
-                     * Creates a new PurgeSuggestionDenyListEntriesMetadata instance using the specified properties.
+                     * Creates a new PurgeCompletionSuggestionsMetadata instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns PurgeSuggestionDenyListEntriesMetadata instance
+                     * @returns PurgeCompletionSuggestionsMetadata instance
                      */
-                    public static create(properties?: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesMetadata): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata;
+                    public static create(properties?: google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsMetadata): google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata;
 
                     /**
-                     * Encodes the specified PurgeSuggestionDenyListEntriesMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata.verify|verify} messages.
-                     * @param message PurgeSuggestionDenyListEntriesMetadata message or plain object to encode
+                     * Encodes the specified PurgeCompletionSuggestionsMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata.verify|verify} messages.
+                     * @param message PurgeCompletionSuggestionsMetadata message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified PurgeSuggestionDenyListEntriesMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata.verify|verify} messages.
-                     * @param message PurgeSuggestionDenyListEntriesMetadata message or plain object to encode
+                     * Encodes the specified PurgeCompletionSuggestionsMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata.verify|verify} messages.
+                     * @param message PurgeCompletionSuggestionsMetadata message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes a PurgeSuggestionDenyListEntriesMetadata message from the specified reader or buffer.
+                     * Decodes a PurgeCompletionSuggestionsMetadata message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns PurgeSuggestionDenyListEntriesMetadata
+                     * @returns PurgeCompletionSuggestionsMetadata
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata;
 
                     /**
-                     * Decodes a PurgeSuggestionDenyListEntriesMetadata message from the specified reader or buffer, length delimited.
+                     * Decodes a PurgeCompletionSuggestionsMetadata message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns PurgeSuggestionDenyListEntriesMetadata
+                     * @returns PurgeCompletionSuggestionsMetadata
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata;
 
                     /**
-                     * Verifies a PurgeSuggestionDenyListEntriesMetadata message.
+                     * Verifies a PurgeCompletionSuggestionsMetadata message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates a PurgeSuggestionDenyListEntriesMetadata message from a plain object. Also converts values to their respective internal types.
+                     * Creates a PurgeCompletionSuggestionsMetadata message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns PurgeSuggestionDenyListEntriesMetadata
+                     * @returns PurgeCompletionSuggestionsMetadata
                      */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata;
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata;
 
                     /**
-                     * Creates a plain object from a PurgeSuggestionDenyListEntriesMetadata message. Also converts values to other types if specified.
-                     * @param message PurgeSuggestionDenyListEntriesMetadata
+                     * Creates a plain object from a PurgeCompletionSuggestionsMetadata message. Also converts values to other types if specified.
+                     * @param message PurgeCompletionSuggestionsMetadata
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this PurgeSuggestionDenyListEntriesMetadata to JSON.
+                     * Converts this PurgeCompletionSuggestionsMetadata to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for PurgeSuggestionDenyListEntriesMetadata
+                     * Gets the default type url for PurgeCompletionSuggestionsMetadata
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
@@ -9718,6 +11241,9 @@ export namespace google {
                     /** SearchRequest userInfo */
                     userInfo?: (google.cloud.discoveryengine.v1.IUserInfo|null);
 
+                    /** SearchRequest languageCode */
+                    languageCode?: (string|null);
+
                     /** SearchRequest facetSpecs */
                     facetSpecs?: (google.cloud.discoveryengine.v1.SearchRequest.IFacetSpec[]|null);
 
@@ -9744,6 +11270,15 @@ export namespace google {
 
                     /** SearchRequest userLabels */
                     userLabels?: ({ [k: string]: string }|null);
+
+                    /** SearchRequest searchAsYouTypeSpec */
+                    searchAsYouTypeSpec?: (google.cloud.discoveryengine.v1.SearchRequest.ISearchAsYouTypeSpec|null);
+
+                    /** SearchRequest session */
+                    session?: (string|null);
+
+                    /** SearchRequest sessionSpec */
+                    sessionSpec?: (google.cloud.discoveryengine.v1.SearchRequest.ISessionSpec|null);
                 }
 
                 /** Represents a SearchRequest. */
@@ -9791,6 +11326,9 @@ export namespace google {
                     /** SearchRequest userInfo. */
                     public userInfo?: (google.cloud.discoveryengine.v1.IUserInfo|null);
 
+                    /** SearchRequest languageCode. */
+                    public languageCode: string;
+
                     /** SearchRequest facetSpecs. */
                     public facetSpecs: google.cloud.discoveryengine.v1.SearchRequest.IFacetSpec[];
 
@@ -9818,6 +11356,15 @@ export namespace google {
                     /** SearchRequest userLabels. */
                     public userLabels: { [k: string]: string };
 
+                    /** SearchRequest searchAsYouTypeSpec. */
+                    public searchAsYouTypeSpec?: (google.cloud.discoveryengine.v1.SearchRequest.ISearchAsYouTypeSpec|null);
+
+                    /** SearchRequest session. */
+                    public session: string;
+
+                    /** SearchRequest sessionSpec. */
+                    public sessionSpec?: (google.cloud.discoveryengine.v1.SearchRequest.ISessionSpec|null);
+
                     /**
                      * Creates a new SearchRequest instance using the specified properties.
                      * @param [properties] Properties to set
@@ -10780,6 +12327,12 @@ export namespace google {
 
                         /** ContentSearchSpec extractiveContentSpec */
                         extractiveContentSpec?: (google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.IExtractiveContentSpec|null);
+
+                        /** ContentSearchSpec searchResultMode */
+                        searchResultMode?: (google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SearchResultMode|keyof typeof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SearchResultMode|null);
+
+                        /** ContentSearchSpec chunkSpec */
+                        chunkSpec?: (google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.IChunkSpec|null);
                     }
 
                     /** Represents a ContentSearchSpec. */
@@ -10800,6 +12353,12 @@ export namespace google {
                         /** ContentSearchSpec extractiveContentSpec. */
                         public extractiveContentSpec?: (google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.IExtractiveContentSpec|null);
 
+                        /** ContentSearchSpec searchResultMode. */
+                        public searchResultMode: (google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SearchResultMode|keyof typeof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SearchResultMode);
+
+                        /** ContentSearchSpec chunkSpec. */
+                        public chunkSpec?: (google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.IChunkSpec|null);
+
                         /**
                          * Creates a new ContentSearchSpec instance using the specified properties.
                          * @param [properties] Properties to set
@@ -11418,33 +12977,356 @@ export namespace google {
                             public static verify(message: { [k: string]: any }): (string|null);
 
                             /**
-                             * Creates an ExtractiveContentSpec message from a plain object. Also converts values to their respective internal types.
+                             * Creates an ExtractiveContentSpec message from a plain object. Also converts values to their respective internal types.
+                             * @param object Plain object
+                             * @returns ExtractiveContentSpec
+                             */
+                            public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec;
+
+                            /**
+                             * Creates a plain object from an ExtractiveContentSpec message. Also converts values to other types if specified.
+                             * @param message ExtractiveContentSpec
+                             * @param [options] Conversion options
+                             * @returns Plain object
+                             */
+                            public static toObject(message: google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                            /**
+                             * Converts this ExtractiveContentSpec to JSON.
+                             * @returns JSON object
+                             */
+                            public toJSON(): { [k: string]: any };
+
+                            /**
+                             * Gets the default type url for ExtractiveContentSpec
+                             * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                             * @returns The default type url
+                             */
+                            public static getTypeUrl(typeUrlPrefix?: string): string;
+                        }
+
+                        /** Properties of a ChunkSpec. */
+                        interface IChunkSpec {
+
+                            /** ChunkSpec numPreviousChunks */
+                            numPreviousChunks?: (number|null);
+
+                            /** ChunkSpec numNextChunks */
+                            numNextChunks?: (number|null);
+                        }
+
+                        /** Represents a ChunkSpec. */
+                        class ChunkSpec implements IChunkSpec {
+
+                            /**
+                             * Constructs a new ChunkSpec.
+                             * @param [properties] Properties to set
+                             */
+                            constructor(properties?: google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.IChunkSpec);
+
+                            /** ChunkSpec numPreviousChunks. */
+                            public numPreviousChunks: number;
+
+                            /** ChunkSpec numNextChunks. */
+                            public numNextChunks: number;
+
+                            /**
+                             * Creates a new ChunkSpec instance using the specified properties.
+                             * @param [properties] Properties to set
+                             * @returns ChunkSpec instance
+                             */
+                            public static create(properties?: google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.IChunkSpec): google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec;
+
+                            /**
+                             * Encodes the specified ChunkSpec message. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec.verify|verify} messages.
+                             * @param message ChunkSpec message or plain object to encode
+                             * @param [writer] Writer to encode to
+                             * @returns Writer
+                             */
+                            public static encode(message: google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.IChunkSpec, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                            /**
+                             * Encodes the specified ChunkSpec message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec.verify|verify} messages.
+                             * @param message ChunkSpec message or plain object to encode
+                             * @param [writer] Writer to encode to
+                             * @returns Writer
+                             */
+                            public static encodeDelimited(message: google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.IChunkSpec, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                            /**
+                             * Decodes a ChunkSpec message from the specified reader or buffer.
+                             * @param reader Reader or buffer to decode from
+                             * @param [length] Message length if known beforehand
+                             * @returns ChunkSpec
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec;
+
+                            /**
+                             * Decodes a ChunkSpec message from the specified reader or buffer, length delimited.
+                             * @param reader Reader or buffer to decode from
+                             * @returns ChunkSpec
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec;
+
+                            /**
+                             * Verifies a ChunkSpec message.
+                             * @param message Plain object to verify
+                             * @returns `null` if valid, otherwise the reason why it is not
+                             */
+                            public static verify(message: { [k: string]: any }): (string|null);
+
+                            /**
+                             * Creates a ChunkSpec message from a plain object. Also converts values to their respective internal types.
                              * @param object Plain object
-                             * @returns ExtractiveContentSpec
+                             * @returns ChunkSpec
                              */
-                            public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec;
+                            public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec;
 
                             /**
-                             * Creates a plain object from an ExtractiveContentSpec message. Also converts values to other types if specified.
-                             * @param message ExtractiveContentSpec
+                             * Creates a plain object from a ChunkSpec message. Also converts values to other types if specified.
+                             * @param message ChunkSpec
                              * @param [options] Conversion options
                              * @returns Plain object
                              */
-                            public static toObject(message: google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                            public static toObject(message: google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                             /**
-                             * Converts this ExtractiveContentSpec to JSON.
+                             * Converts this ChunkSpec to JSON.
                              * @returns JSON object
                              */
                             public toJSON(): { [k: string]: any };
 
                             /**
-                             * Gets the default type url for ExtractiveContentSpec
+                             * Gets the default type url for ChunkSpec
                              * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                              * @returns The default type url
                              */
                             public static getTypeUrl(typeUrlPrefix?: string): string;
                         }
+
+                        /** SearchResultMode enum. */
+                        enum SearchResultMode {
+                            SEARCH_RESULT_MODE_UNSPECIFIED = 0,
+                            DOCUMENTS = 1,
+                            CHUNKS = 2
+                        }
+                    }
+
+                    /** Properties of a SearchAsYouTypeSpec. */
+                    interface ISearchAsYouTypeSpec {
+
+                        /** SearchAsYouTypeSpec condition */
+                        condition?: (google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec.Condition|keyof typeof google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec.Condition|null);
+                    }
+
+                    /** Represents a SearchAsYouTypeSpec. */
+                    class SearchAsYouTypeSpec implements ISearchAsYouTypeSpec {
+
+                        /**
+                         * Constructs a new SearchAsYouTypeSpec.
+                         * @param [properties] Properties to set
+                         */
+                        constructor(properties?: google.cloud.discoveryengine.v1.SearchRequest.ISearchAsYouTypeSpec);
+
+                        /** SearchAsYouTypeSpec condition. */
+                        public condition: (google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec.Condition|keyof typeof google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec.Condition);
+
+                        /**
+                         * Creates a new SearchAsYouTypeSpec instance using the specified properties.
+                         * @param [properties] Properties to set
+                         * @returns SearchAsYouTypeSpec instance
+                         */
+                        public static create(properties?: google.cloud.discoveryengine.v1.SearchRequest.ISearchAsYouTypeSpec): google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec;
+
+                        /**
+                         * Encodes the specified SearchAsYouTypeSpec message. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec.verify|verify} messages.
+                         * @param message SearchAsYouTypeSpec message or plain object to encode
+                         * @param [writer] Writer to encode to
+                         * @returns Writer
+                         */
+                        public static encode(message: google.cloud.discoveryengine.v1.SearchRequest.ISearchAsYouTypeSpec, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                        /**
+                         * Encodes the specified SearchAsYouTypeSpec message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec.verify|verify} messages.
+                         * @param message SearchAsYouTypeSpec message or plain object to encode
+                         * @param [writer] Writer to encode to
+                         * @returns Writer
+                         */
+                        public static encodeDelimited(message: google.cloud.discoveryengine.v1.SearchRequest.ISearchAsYouTypeSpec, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                        /**
+                         * Decodes a SearchAsYouTypeSpec message from the specified reader or buffer.
+                         * @param reader Reader or buffer to decode from
+                         * @param [length] Message length if known beforehand
+                         * @returns SearchAsYouTypeSpec
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec;
+
+                        /**
+                         * Decodes a SearchAsYouTypeSpec message from the specified reader or buffer, length delimited.
+                         * @param reader Reader or buffer to decode from
+                         * @returns SearchAsYouTypeSpec
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec;
+
+                        /**
+                         * Verifies a SearchAsYouTypeSpec message.
+                         * @param message Plain object to verify
+                         * @returns `null` if valid, otherwise the reason why it is not
+                         */
+                        public static verify(message: { [k: string]: any }): (string|null);
+
+                        /**
+                         * Creates a SearchAsYouTypeSpec message from a plain object. Also converts values to their respective internal types.
+                         * @param object Plain object
+                         * @returns SearchAsYouTypeSpec
+                         */
+                        public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec;
+
+                        /**
+                         * Creates a plain object from a SearchAsYouTypeSpec message. Also converts values to other types if specified.
+                         * @param message SearchAsYouTypeSpec
+                         * @param [options] Conversion options
+                         * @returns Plain object
+                         */
+                        public static toObject(message: google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                        /**
+                         * Converts this SearchAsYouTypeSpec to JSON.
+                         * @returns JSON object
+                         */
+                        public toJSON(): { [k: string]: any };
+
+                        /**
+                         * Gets the default type url for SearchAsYouTypeSpec
+                         * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns The default type url
+                         */
+                        public static getTypeUrl(typeUrlPrefix?: string): string;
+                    }
+
+                    namespace SearchAsYouTypeSpec {
+
+                        /** Condition enum. */
+                        enum Condition {
+                            CONDITION_UNSPECIFIED = 0,
+                            DISABLED = 1,
+                            ENABLED = 2
+                        }
+                    }
+
+                    /** Properties of a SessionSpec. */
+                    interface ISessionSpec {
+
+                        /** SessionSpec queryId */
+                        queryId?: (string|null);
+
+                        /** SessionSpec searchResultPersistenceCount */
+                        searchResultPersistenceCount?: (number|null);
+                    }
+
+                    /** Represents a SessionSpec. */
+                    class SessionSpec implements ISessionSpec {
+
+                        /**
+                         * Constructs a new SessionSpec.
+                         * @param [properties] Properties to set
+                         */
+                        constructor(properties?: google.cloud.discoveryengine.v1.SearchRequest.ISessionSpec);
+
+                        /** SessionSpec queryId. */
+                        public queryId: string;
+
+                        /** SessionSpec searchResultPersistenceCount. */
+                        public searchResultPersistenceCount?: (number|null);
+
+                        /** SessionSpec _searchResultPersistenceCount. */
+                        public _searchResultPersistenceCount?: "searchResultPersistenceCount";
+
+                        /**
+                         * Creates a new SessionSpec instance using the specified properties.
+                         * @param [properties] Properties to set
+                         * @returns SessionSpec instance
+                         */
+                        public static create(properties?: google.cloud.discoveryengine.v1.SearchRequest.ISessionSpec): google.cloud.discoveryengine.v1.SearchRequest.SessionSpec;
+
+                        /**
+                         * Encodes the specified SessionSpec message. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchRequest.SessionSpec.verify|verify} messages.
+                         * @param message SessionSpec message or plain object to encode
+                         * @param [writer] Writer to encode to
+                         * @returns Writer
+                         */
+                        public static encode(message: google.cloud.discoveryengine.v1.SearchRequest.ISessionSpec, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                        /**
+                         * Encodes the specified SessionSpec message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchRequest.SessionSpec.verify|verify} messages.
+                         * @param message SessionSpec message or plain object to encode
+                         * @param [writer] Writer to encode to
+                         * @returns Writer
+                         */
+                        public static encodeDelimited(message: google.cloud.discoveryengine.v1.SearchRequest.ISessionSpec, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                        /**
+                         * Decodes a SessionSpec message from the specified reader or buffer.
+                         * @param reader Reader or buffer to decode from
+                         * @param [length] Message length if known beforehand
+                         * @returns SessionSpec
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.SearchRequest.SessionSpec;
+
+                        /**
+                         * Decodes a SessionSpec message from the specified reader or buffer, length delimited.
+                         * @param reader Reader or buffer to decode from
+                         * @returns SessionSpec
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.SearchRequest.SessionSpec;
+
+                        /**
+                         * Verifies a SessionSpec message.
+                         * @param message Plain object to verify
+                         * @returns `null` if valid, otherwise the reason why it is not
+                         */
+                        public static verify(message: { [k: string]: any }): (string|null);
+
+                        /**
+                         * Creates a SessionSpec message from a plain object. Also converts values to their respective internal types.
+                         * @param object Plain object
+                         * @returns SessionSpec
+                         */
+                        public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.SearchRequest.SessionSpec;
+
+                        /**
+                         * Creates a plain object from a SessionSpec message. Also converts values to other types if specified.
+                         * @param message SessionSpec
+                         * @param [options] Conversion options
+                         * @returns Plain object
+                         */
+                        public static toObject(message: google.cloud.discoveryengine.v1.SearchRequest.SessionSpec, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                        /**
+                         * Converts this SessionSpec to JSON.
+                         * @returns JSON object
+                         */
+                        public toJSON(): { [k: string]: any };
+
+                        /**
+                         * Gets the default type url for SessionSpec
+                         * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns The default type url
+                         */
+                        public static getTypeUrl(typeUrlPrefix?: string): string;
                     }
                 }
 
@@ -11477,6 +13359,9 @@ export namespace google {
 
                     /** SearchResponse queryExpansionInfo */
                     queryExpansionInfo?: (google.cloud.discoveryengine.v1.SearchResponse.IQueryExpansionInfo|null);
+
+                    /** SearchResponse sessionInfo */
+                    sessionInfo?: (google.cloud.discoveryengine.v1.SearchResponse.ISessionInfo|null);
                 }
 
                 /** Represents a SearchResponse. */
@@ -11515,6 +13400,9 @@ export namespace google {
                     /** SearchResponse queryExpansionInfo. */
                     public queryExpansionInfo?: (google.cloud.discoveryengine.v1.SearchResponse.IQueryExpansionInfo|null);
 
+                    /** SearchResponse sessionInfo. */
+                    public sessionInfo?: (google.cloud.discoveryengine.v1.SearchResponse.ISessionInfo|null);
+
                     /**
                      * Creates a new SearchResponse instance using the specified properties.
                      * @param [properties] Properties to set
@@ -11603,6 +13491,9 @@ export namespace google {
 
                         /** SearchResult document */
                         document?: (google.cloud.discoveryengine.v1.IDocument|null);
+
+                        /** SearchResult chunk */
+                        chunk?: (google.cloud.discoveryengine.v1.IChunk|null);
                     }
 
                     /** Represents a SearchResult. */
@@ -11620,6 +13511,9 @@ export namespace google {
                         /** SearchResult document. */
                         public document?: (google.cloud.discoveryengine.v1.IDocument|null);
 
+                        /** SearchResult chunk. */
+                        public chunk?: (google.cloud.discoveryengine.v1.IChunk|null);
+
                         /**
                          * Creates a new SearchResult instance using the specified properties.
                          * @param [properties] Properties to set
@@ -12786,103 +14680,206 @@ export namespace google {
                         }
                     }
 
-                    /** Properties of a QueryExpansionInfo. */
-                    interface IQueryExpansionInfo {
+                    /** Properties of a QueryExpansionInfo. */
+                    interface IQueryExpansionInfo {
+
+                        /** QueryExpansionInfo expandedQuery */
+                        expandedQuery?: (boolean|null);
+
+                        /** QueryExpansionInfo pinnedResultCount */
+                        pinnedResultCount?: (number|Long|string|null);
+                    }
+
+                    /** Represents a QueryExpansionInfo. */
+                    class QueryExpansionInfo implements IQueryExpansionInfo {
+
+                        /**
+                         * Constructs a new QueryExpansionInfo.
+                         * @param [properties] Properties to set
+                         */
+                        constructor(properties?: google.cloud.discoveryengine.v1.SearchResponse.IQueryExpansionInfo);
+
+                        /** QueryExpansionInfo expandedQuery. */
+                        public expandedQuery: boolean;
+
+                        /** QueryExpansionInfo pinnedResultCount. */
+                        public pinnedResultCount: (number|Long|string);
+
+                        /**
+                         * Creates a new QueryExpansionInfo instance using the specified properties.
+                         * @param [properties] Properties to set
+                         * @returns QueryExpansionInfo instance
+                         */
+                        public static create(properties?: google.cloud.discoveryengine.v1.SearchResponse.IQueryExpansionInfo): google.cloud.discoveryengine.v1.SearchResponse.QueryExpansionInfo;
+
+                        /**
+                         * Encodes the specified QueryExpansionInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchResponse.QueryExpansionInfo.verify|verify} messages.
+                         * @param message QueryExpansionInfo message or plain object to encode
+                         * @param [writer] Writer to encode to
+                         * @returns Writer
+                         */
+                        public static encode(message: google.cloud.discoveryengine.v1.SearchResponse.IQueryExpansionInfo, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                        /**
+                         * Encodes the specified QueryExpansionInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchResponse.QueryExpansionInfo.verify|verify} messages.
+                         * @param message QueryExpansionInfo message or plain object to encode
+                         * @param [writer] Writer to encode to
+                         * @returns Writer
+                         */
+                        public static encodeDelimited(message: google.cloud.discoveryengine.v1.SearchResponse.IQueryExpansionInfo, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                        /**
+                         * Decodes a QueryExpansionInfo message from the specified reader or buffer.
+                         * @param reader Reader or buffer to decode from
+                         * @param [length] Message length if known beforehand
+                         * @returns QueryExpansionInfo
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.SearchResponse.QueryExpansionInfo;
+
+                        /**
+                         * Decodes a QueryExpansionInfo message from the specified reader or buffer, length delimited.
+                         * @param reader Reader or buffer to decode from
+                         * @returns QueryExpansionInfo
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.SearchResponse.QueryExpansionInfo;
+
+                        /**
+                         * Verifies a QueryExpansionInfo message.
+                         * @param message Plain object to verify
+                         * @returns `null` if valid, otherwise the reason why it is not
+                         */
+                        public static verify(message: { [k: string]: any }): (string|null);
+
+                        /**
+                         * Creates a QueryExpansionInfo message from a plain object. Also converts values to their respective internal types.
+                         * @param object Plain object
+                         * @returns QueryExpansionInfo
+                         */
+                        public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.SearchResponse.QueryExpansionInfo;
+
+                        /**
+                         * Creates a plain object from a QueryExpansionInfo message. Also converts values to other types if specified.
+                         * @param message QueryExpansionInfo
+                         * @param [options] Conversion options
+                         * @returns Plain object
+                         */
+                        public static toObject(message: google.cloud.discoveryengine.v1.SearchResponse.QueryExpansionInfo, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                        /**
+                         * Converts this QueryExpansionInfo to JSON.
+                         * @returns JSON object
+                         */
+                        public toJSON(): { [k: string]: any };
+
+                        /**
+                         * Gets the default type url for QueryExpansionInfo
+                         * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns The default type url
+                         */
+                        public static getTypeUrl(typeUrlPrefix?: string): string;
+                    }
+
+                    /** Properties of a SessionInfo. */
+                    interface ISessionInfo {
 
-                        /** QueryExpansionInfo expandedQuery */
-                        expandedQuery?: (boolean|null);
+                        /** SessionInfo name */
+                        name?: (string|null);
 
-                        /** QueryExpansionInfo pinnedResultCount */
-                        pinnedResultCount?: (number|Long|string|null);
+                        /** SessionInfo queryId */
+                        queryId?: (string|null);
                     }
 
-                    /** Represents a QueryExpansionInfo. */
-                    class QueryExpansionInfo implements IQueryExpansionInfo {
+                    /** Represents a SessionInfo. */
+                    class SessionInfo implements ISessionInfo {
 
                         /**
-                         * Constructs a new QueryExpansionInfo.
+                         * Constructs a new SessionInfo.
                          * @param [properties] Properties to set
                          */
-                        constructor(properties?: google.cloud.discoveryengine.v1.SearchResponse.IQueryExpansionInfo);
+                        constructor(properties?: google.cloud.discoveryengine.v1.SearchResponse.ISessionInfo);
 
-                        /** QueryExpansionInfo expandedQuery. */
-                        public expandedQuery: boolean;
+                        /** SessionInfo name. */
+                        public name: string;
 
-                        /** QueryExpansionInfo pinnedResultCount. */
-                        public pinnedResultCount: (number|Long|string);
+                        /** SessionInfo queryId. */
+                        public queryId: string;
 
                         /**
-                         * Creates a new QueryExpansionInfo instance using the specified properties.
+                         * Creates a new SessionInfo instance using the specified properties.
                          * @param [properties] Properties to set
-                         * @returns QueryExpansionInfo instance
+                         * @returns SessionInfo instance
                          */
-                        public static create(properties?: google.cloud.discoveryengine.v1.SearchResponse.IQueryExpansionInfo): google.cloud.discoveryengine.v1.SearchResponse.QueryExpansionInfo;
+                        public static create(properties?: google.cloud.discoveryengine.v1.SearchResponse.ISessionInfo): google.cloud.discoveryengine.v1.SearchResponse.SessionInfo;
 
                         /**
-                         * Encodes the specified QueryExpansionInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchResponse.QueryExpansionInfo.verify|verify} messages.
-                         * @param message QueryExpansionInfo message or plain object to encode
+                         * Encodes the specified SessionInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchResponse.SessionInfo.verify|verify} messages.
+                         * @param message SessionInfo message or plain object to encode
                          * @param [writer] Writer to encode to
                          * @returns Writer
                          */
-                        public static encode(message: google.cloud.discoveryengine.v1.SearchResponse.IQueryExpansionInfo, writer?: $protobuf.Writer): $protobuf.Writer;
+                        public static encode(message: google.cloud.discoveryengine.v1.SearchResponse.ISessionInfo, writer?: $protobuf.Writer): $protobuf.Writer;
 
                         /**
-                         * Encodes the specified QueryExpansionInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchResponse.QueryExpansionInfo.verify|verify} messages.
-                         * @param message QueryExpansionInfo message or plain object to encode
+                         * Encodes the specified SessionInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchResponse.SessionInfo.verify|verify} messages.
+                         * @param message SessionInfo message or plain object to encode
                          * @param [writer] Writer to encode to
                          * @returns Writer
                          */
-                        public static encodeDelimited(message: google.cloud.discoveryengine.v1.SearchResponse.IQueryExpansionInfo, writer?: $protobuf.Writer): $protobuf.Writer;
+                        public static encodeDelimited(message: google.cloud.discoveryengine.v1.SearchResponse.ISessionInfo, writer?: $protobuf.Writer): $protobuf.Writer;
 
                         /**
-                         * Decodes a QueryExpansionInfo message from the specified reader or buffer.
+                         * Decodes a SessionInfo message from the specified reader or buffer.
                          * @param reader Reader or buffer to decode from
                          * @param [length] Message length if known beforehand
-                         * @returns QueryExpansionInfo
+                         * @returns SessionInfo
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.SearchResponse.QueryExpansionInfo;
+                        public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.SearchResponse.SessionInfo;
 
                         /**
-                         * Decodes a QueryExpansionInfo message from the specified reader or buffer, length delimited.
+                         * Decodes a SessionInfo message from the specified reader or buffer, length delimited.
                          * @param reader Reader or buffer to decode from
-                         * @returns QueryExpansionInfo
+                         * @returns SessionInfo
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.SearchResponse.QueryExpansionInfo;
+                        public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.SearchResponse.SessionInfo;
 
                         /**
-                         * Verifies a QueryExpansionInfo message.
+                         * Verifies a SessionInfo message.
                          * @param message Plain object to verify
                          * @returns `null` if valid, otherwise the reason why it is not
                          */
                         public static verify(message: { [k: string]: any }): (string|null);
 
                         /**
-                         * Creates a QueryExpansionInfo message from a plain object. Also converts values to their respective internal types.
+                         * Creates a SessionInfo message from a plain object. Also converts values to their respective internal types.
                          * @param object Plain object
-                         * @returns QueryExpansionInfo
+                         * @returns SessionInfo
                          */
-                        public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.SearchResponse.QueryExpansionInfo;
+                        public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.SearchResponse.SessionInfo;
 
                         /**
-                         * Creates a plain object from a QueryExpansionInfo message. Also converts values to other types if specified.
-                         * @param message QueryExpansionInfo
+                         * Creates a plain object from a SessionInfo message. Also converts values to other types if specified.
+                         * @param message SessionInfo
                          * @param [options] Conversion options
                          * @returns Plain object
                          */
-                        public static toObject(message: google.cloud.discoveryengine.v1.SearchResponse.QueryExpansionInfo, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                        public static toObject(message: google.cloud.discoveryengine.v1.SearchResponse.SessionInfo, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                         /**
-                         * Converts this QueryExpansionInfo to JSON.
+                         * Converts this SessionInfo to JSON.
                          * @returns JSON object
                          */
                         public toJSON(): { [k: string]: any };
 
                         /**
-                         * Gets the default type url for QueryExpansionInfo
+                         * Gets the default type url for SessionInfo
                          * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns The default type url
                          */
@@ -14097,6 +16094,9 @@ export namespace google {
 
                     /** AnswerQueryRequest userPseudoId */
                     userPseudoId?: (string|null);
+
+                    /** AnswerQueryRequest userLabels */
+                    userLabels?: ({ [k: string]: string }|null);
                 }
 
                 /** Represents an AnswerQueryRequest. */
@@ -14138,6 +16138,9 @@ export namespace google {
                     /** AnswerQueryRequest userPseudoId. */
                     public userPseudoId: string;
 
+                    /** AnswerQueryRequest userLabels. */
+                    public userLabels: { [k: string]: string };
+
                     /**
                      * Creates a new AnswerQueryRequest instance using the specified properties.
                      * @param [properties] Properties to set
@@ -14868,6 +16871,9 @@ export namespace google {
                             /** SearchParams orderBy */
                             orderBy?: (string|null);
 
+                            /** SearchParams searchResultMode */
+                            searchResultMode?: (google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SearchResultMode|keyof typeof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SearchResultMode|null);
+
                             /** SearchParams dataStoreSpecs */
                             dataStoreSpecs?: (google.cloud.discoveryengine.v1.SearchRequest.IDataStoreSpec[]|null);
                         }
@@ -14893,6 +16899,9 @@ export namespace google {
                             /** SearchParams orderBy. */
                             public orderBy: string;
 
+                            /** SearchParams searchResultMode. */
+                            public searchResultMode: (google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SearchResultMode|keyof typeof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SearchResultMode);
+
                             /** SearchParams dataStoreSpecs. */
                             public dataStoreSpecs: google.cloud.discoveryengine.v1.SearchRequest.IDataStoreSpec[];
 
@@ -15943,6 +17952,9 @@ export namespace google {
 
                             /** QueryRephraserSpec disable */
                             disable?: (boolean|null);
+
+                            /** QueryRephraserSpec maxRephraseSteps */
+                            maxRephraseSteps?: (number|null);
                         }
 
                         /** Represents a QueryRephraserSpec. */
@@ -15957,6 +17969,9 @@ export namespace google {
                             /** QueryRephraserSpec disable. */
                             public disable: boolean;
 
+                            /** QueryRephraserSpec maxRephraseSteps. */
+                            public maxRephraseSteps: number;
+
                             /**
                              * Creates a new QueryRephraserSpec instance using the specified properties.
                              * @param [properties] Properties to set
@@ -17374,110 +19389,322 @@ export namespace google {
                     /** DocumentProcessingConfig name */
                     name?: (string|null);
 
-                    /** DocumentProcessingConfig defaultParsingConfig */
-                    defaultParsingConfig?: (google.cloud.discoveryengine.v1.DocumentProcessingConfig.IParsingConfig|null);
+                    /** DocumentProcessingConfig chunkingConfig */
+                    chunkingConfig?: (google.cloud.discoveryengine.v1.DocumentProcessingConfig.IChunkingConfig|null);
+
+                    /** DocumentProcessingConfig defaultParsingConfig */
+                    defaultParsingConfig?: (google.cloud.discoveryengine.v1.DocumentProcessingConfig.IParsingConfig|null);
+
+                    /** DocumentProcessingConfig parsingConfigOverrides */
+                    parsingConfigOverrides?: ({ [k: string]: google.cloud.discoveryengine.v1.DocumentProcessingConfig.IParsingConfig }|null);
+                }
+
+                /** Represents a DocumentProcessingConfig. */
+                class DocumentProcessingConfig implements IDocumentProcessingConfig {
+
+                    /**
+                     * Constructs a new DocumentProcessingConfig.
+                     * @param [properties] Properties to set
+                     */
+                    constructor(properties?: google.cloud.discoveryengine.v1.IDocumentProcessingConfig);
+
+                    /** DocumentProcessingConfig name. */
+                    public name: string;
+
+                    /** DocumentProcessingConfig chunkingConfig. */
+                    public chunkingConfig?: (google.cloud.discoveryengine.v1.DocumentProcessingConfig.IChunkingConfig|null);
+
+                    /** DocumentProcessingConfig defaultParsingConfig. */
+                    public defaultParsingConfig?: (google.cloud.discoveryengine.v1.DocumentProcessingConfig.IParsingConfig|null);
+
+                    /** DocumentProcessingConfig parsingConfigOverrides. */
+                    public parsingConfigOverrides: { [k: string]: google.cloud.discoveryengine.v1.DocumentProcessingConfig.IParsingConfig };
+
+                    /**
+                     * Creates a new DocumentProcessingConfig instance using the specified properties.
+                     * @param [properties] Properties to set
+                     * @returns DocumentProcessingConfig instance
+                     */
+                    public static create(properties?: google.cloud.discoveryengine.v1.IDocumentProcessingConfig): google.cloud.discoveryengine.v1.DocumentProcessingConfig;
+
+                    /**
+                     * Encodes the specified DocumentProcessingConfig message. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentProcessingConfig.verify|verify} messages.
+                     * @param message DocumentProcessingConfig message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encode(message: google.cloud.discoveryengine.v1.IDocumentProcessingConfig, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                    /**
+                     * Encodes the specified DocumentProcessingConfig message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentProcessingConfig.verify|verify} messages.
+                     * @param message DocumentProcessingConfig message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IDocumentProcessingConfig, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                    /**
+                     * Decodes a DocumentProcessingConfig message from the specified reader or buffer.
+                     * @param reader Reader or buffer to decode from
+                     * @param [length] Message length if known beforehand
+                     * @returns DocumentProcessingConfig
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.DocumentProcessingConfig;
+
+                    /**
+                     * Decodes a DocumentProcessingConfig message from the specified reader or buffer, length delimited.
+                     * @param reader Reader or buffer to decode from
+                     * @returns DocumentProcessingConfig
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.DocumentProcessingConfig;
+
+                    /**
+                     * Verifies a DocumentProcessingConfig message.
+                     * @param message Plain object to verify
+                     * @returns `null` if valid, otherwise the reason why it is not
+                     */
+                    public static verify(message: { [k: string]: any }): (string|null);
+
+                    /**
+                     * Creates a DocumentProcessingConfig message from a plain object. Also converts values to their respective internal types.
+                     * @param object Plain object
+                     * @returns DocumentProcessingConfig
+                     */
+                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.DocumentProcessingConfig;
+
+                    /**
+                     * Creates a plain object from a DocumentProcessingConfig message. Also converts values to other types if specified.
+                     * @param message DocumentProcessingConfig
+                     * @param [options] Conversion options
+                     * @returns Plain object
+                     */
+                    public static toObject(message: google.cloud.discoveryengine.v1.DocumentProcessingConfig, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                    /**
+                     * Converts this DocumentProcessingConfig to JSON.
+                     * @returns JSON object
+                     */
+                    public toJSON(): { [k: string]: any };
+
+                    /**
+                     * Gets the default type url for DocumentProcessingConfig
+                     * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                     * @returns The default type url
+                     */
+                    public static getTypeUrl(typeUrlPrefix?: string): string;
+                }
+
+                namespace DocumentProcessingConfig {
+
+                    /** Properties of a ChunkingConfig. */
+                    interface IChunkingConfig {
+
+                        /** ChunkingConfig layoutBasedChunkingConfig */
+                        layoutBasedChunkingConfig?: (google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.ILayoutBasedChunkingConfig|null);
+                    }
+
+                    /** Represents a ChunkingConfig. */
+                    class ChunkingConfig implements IChunkingConfig {
+
+                        /**
+                         * Constructs a new ChunkingConfig.
+                         * @param [properties] Properties to set
+                         */
+                        constructor(properties?: google.cloud.discoveryengine.v1.DocumentProcessingConfig.IChunkingConfig);
+
+                        /** ChunkingConfig layoutBasedChunkingConfig. */
+                        public layoutBasedChunkingConfig?: (google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.ILayoutBasedChunkingConfig|null);
+
+                        /** ChunkingConfig chunkMode. */
+                        public chunkMode?: "layoutBasedChunkingConfig";
+
+                        /**
+                         * Creates a new ChunkingConfig instance using the specified properties.
+                         * @param [properties] Properties to set
+                         * @returns ChunkingConfig instance
+                         */
+                        public static create(properties?: google.cloud.discoveryengine.v1.DocumentProcessingConfig.IChunkingConfig): google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig;
+
+                        /**
+                         * Encodes the specified ChunkingConfig message. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.verify|verify} messages.
+                         * @param message ChunkingConfig message or plain object to encode
+                         * @param [writer] Writer to encode to
+                         * @returns Writer
+                         */
+                        public static encode(message: google.cloud.discoveryengine.v1.DocumentProcessingConfig.IChunkingConfig, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                        /**
+                         * Encodes the specified ChunkingConfig message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.verify|verify} messages.
+                         * @param message ChunkingConfig message or plain object to encode
+                         * @param [writer] Writer to encode to
+                         * @returns Writer
+                         */
+                        public static encodeDelimited(message: google.cloud.discoveryengine.v1.DocumentProcessingConfig.IChunkingConfig, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                        /**
+                         * Decodes a ChunkingConfig message from the specified reader or buffer.
+                         * @param reader Reader or buffer to decode from
+                         * @param [length] Message length if known beforehand
+                         * @returns ChunkingConfig
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig;
+
+                        /**
+                         * Decodes a ChunkingConfig message from the specified reader or buffer, length delimited.
+                         * @param reader Reader or buffer to decode from
+                         * @returns ChunkingConfig
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig;
+
+                        /**
+                         * Verifies a ChunkingConfig message.
+                         * @param message Plain object to verify
+                         * @returns `null` if valid, otherwise the reason why it is not
+                         */
+                        public static verify(message: { [k: string]: any }): (string|null);
+
+                        /**
+                         * Creates a ChunkingConfig message from a plain object. Also converts values to their respective internal types.
+                         * @param object Plain object
+                         * @returns ChunkingConfig
+                         */
+                        public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig;
+
+                        /**
+                         * Creates a plain object from a ChunkingConfig message. Also converts values to other types if specified.
+                         * @param message ChunkingConfig
+                         * @param [options] Conversion options
+                         * @returns Plain object
+                         */
+                        public static toObject(message: google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                        /**
+                         * Converts this ChunkingConfig to JSON.
+                         * @returns JSON object
+                         */
+                        public toJSON(): { [k: string]: any };
+
+                        /**
+                         * Gets the default type url for ChunkingConfig
+                         * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns The default type url
+                         */
+                        public static getTypeUrl(typeUrlPrefix?: string): string;
+                    }
+
+                    namespace ChunkingConfig {
 
-                    /** DocumentProcessingConfig parsingConfigOverrides */
-                    parsingConfigOverrides?: ({ [k: string]: google.cloud.discoveryengine.v1.DocumentProcessingConfig.IParsingConfig }|null);
-                }
+                        /** Properties of a LayoutBasedChunkingConfig. */
+                        interface ILayoutBasedChunkingConfig {
 
-                /** Represents a DocumentProcessingConfig. */
-                class DocumentProcessingConfig implements IDocumentProcessingConfig {
+                            /** LayoutBasedChunkingConfig chunkSize */
+                            chunkSize?: (number|null);
 
-                    /**
-                     * Constructs a new DocumentProcessingConfig.
-                     * @param [properties] Properties to set
-                     */
-                    constructor(properties?: google.cloud.discoveryengine.v1.IDocumentProcessingConfig);
+                            /** LayoutBasedChunkingConfig includeAncestorHeadings */
+                            includeAncestorHeadings?: (boolean|null);
+                        }
 
-                    /** DocumentProcessingConfig name. */
-                    public name: string;
+                        /** Represents a LayoutBasedChunkingConfig. */
+                        class LayoutBasedChunkingConfig implements ILayoutBasedChunkingConfig {
 
-                    /** DocumentProcessingConfig defaultParsingConfig. */
-                    public defaultParsingConfig?: (google.cloud.discoveryengine.v1.DocumentProcessingConfig.IParsingConfig|null);
+                            /**
+                             * Constructs a new LayoutBasedChunkingConfig.
+                             * @param [properties] Properties to set
+                             */
+                            constructor(properties?: google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.ILayoutBasedChunkingConfig);
 
-                    /** DocumentProcessingConfig parsingConfigOverrides. */
-                    public parsingConfigOverrides: { [k: string]: google.cloud.discoveryengine.v1.DocumentProcessingConfig.IParsingConfig };
+                            /** LayoutBasedChunkingConfig chunkSize. */
+                            public chunkSize: number;
 
-                    /**
-                     * Creates a new DocumentProcessingConfig instance using the specified properties.
-                     * @param [properties] Properties to set
-                     * @returns DocumentProcessingConfig instance
-                     */
-                    public static create(properties?: google.cloud.discoveryengine.v1.IDocumentProcessingConfig): google.cloud.discoveryengine.v1.DocumentProcessingConfig;
+                            /** LayoutBasedChunkingConfig includeAncestorHeadings. */
+                            public includeAncestorHeadings: boolean;
 
-                    /**
-                     * Encodes the specified DocumentProcessingConfig message. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentProcessingConfig.verify|verify} messages.
-                     * @param message DocumentProcessingConfig message or plain object to encode
-                     * @param [writer] Writer to encode to
-                     * @returns Writer
-                     */
-                    public static encode(message: google.cloud.discoveryengine.v1.IDocumentProcessingConfig, writer?: $protobuf.Writer): $protobuf.Writer;
+                            /**
+                             * Creates a new LayoutBasedChunkingConfig instance using the specified properties.
+                             * @param [properties] Properties to set
+                             * @returns LayoutBasedChunkingConfig instance
+                             */
+                            public static create(properties?: google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.ILayoutBasedChunkingConfig): google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig;
 
-                    /**
-                     * Encodes the specified DocumentProcessingConfig message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentProcessingConfig.verify|verify} messages.
-                     * @param message DocumentProcessingConfig message or plain object to encode
-                     * @param [writer] Writer to encode to
-                     * @returns Writer
-                     */
-                    public static encodeDelimited(message: google.cloud.discoveryengine.v1.IDocumentProcessingConfig, writer?: $protobuf.Writer): $protobuf.Writer;
+                            /**
+                             * Encodes the specified LayoutBasedChunkingConfig message. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig.verify|verify} messages.
+                             * @param message LayoutBasedChunkingConfig message or plain object to encode
+                             * @param [writer] Writer to encode to
+                             * @returns Writer
+                             */
+                            public static encode(message: google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.ILayoutBasedChunkingConfig, writer?: $protobuf.Writer): $protobuf.Writer;
 
-                    /**
-                     * Decodes a DocumentProcessingConfig message from the specified reader or buffer.
-                     * @param reader Reader or buffer to decode from
-                     * @param [length] Message length if known beforehand
-                     * @returns DocumentProcessingConfig
-                     * @throws {Error} If the payload is not a reader or valid buffer
-                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                     */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.DocumentProcessingConfig;
+                            /**
+                             * Encodes the specified LayoutBasedChunkingConfig message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig.verify|verify} messages.
+                             * @param message LayoutBasedChunkingConfig message or plain object to encode
+                             * @param [writer] Writer to encode to
+                             * @returns Writer
+                             */
+                            public static encodeDelimited(message: google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.ILayoutBasedChunkingConfig, writer?: $protobuf.Writer): $protobuf.Writer;
 
-                    /**
-                     * Decodes a DocumentProcessingConfig message from the specified reader or buffer, length delimited.
-                     * @param reader Reader or buffer to decode from
-                     * @returns DocumentProcessingConfig
-                     * @throws {Error} If the payload is not a reader or valid buffer
-                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                     */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.DocumentProcessingConfig;
+                            /**
+                             * Decodes a LayoutBasedChunkingConfig message from the specified reader or buffer.
+                             * @param reader Reader or buffer to decode from
+                             * @param [length] Message length if known beforehand
+                             * @returns LayoutBasedChunkingConfig
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig;
 
-                    /**
-                     * Verifies a DocumentProcessingConfig message.
-                     * @param message Plain object to verify
-                     * @returns `null` if valid, otherwise the reason why it is not
-                     */
-                    public static verify(message: { [k: string]: any }): (string|null);
+                            /**
+                             * Decodes a LayoutBasedChunkingConfig message from the specified reader or buffer, length delimited.
+                             * @param reader Reader or buffer to decode from
+                             * @returns LayoutBasedChunkingConfig
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig;
 
-                    /**
-                     * Creates a DocumentProcessingConfig message from a plain object. Also converts values to their respective internal types.
-                     * @param object Plain object
-                     * @returns DocumentProcessingConfig
-                     */
-                    public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.DocumentProcessingConfig;
+                            /**
+                             * Verifies a LayoutBasedChunkingConfig message.
+                             * @param message Plain object to verify
+                             * @returns `null` if valid, otherwise the reason why it is not
+                             */
+                            public static verify(message: { [k: string]: any }): (string|null);
 
-                    /**
-                     * Creates a plain object from a DocumentProcessingConfig message. Also converts values to other types if specified.
-                     * @param message DocumentProcessingConfig
-                     * @param [options] Conversion options
-                     * @returns Plain object
-                     */
-                    public static toObject(message: google.cloud.discoveryengine.v1.DocumentProcessingConfig, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                            /**
+                             * Creates a LayoutBasedChunkingConfig message from a plain object. Also converts values to their respective internal types.
+                             * @param object Plain object
+                             * @returns LayoutBasedChunkingConfig
+                             */
+                            public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig;
 
-                    /**
-                     * Converts this DocumentProcessingConfig to JSON.
-                     * @returns JSON object
-                     */
-                    public toJSON(): { [k: string]: any };
+                            /**
+                             * Creates a plain object from a LayoutBasedChunkingConfig message. Also converts values to other types if specified.
+                             * @param message LayoutBasedChunkingConfig
+                             * @param [options] Conversion options
+                             * @returns Plain object
+                             */
+                            public static toObject(message: google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
-                    /**
-                     * Gets the default type url for DocumentProcessingConfig
-                     * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                     * @returns The default type url
-                     */
-                    public static getTypeUrl(typeUrlPrefix?: string): string;
-                }
+                            /**
+                             * Converts this LayoutBasedChunkingConfig to JSON.
+                             * @returns JSON object
+                             */
+                            public toJSON(): { [k: string]: any };
 
-                namespace DocumentProcessingConfig {
+                            /**
+                             * Gets the default type url for LayoutBasedChunkingConfig
+                             * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                             * @returns The default type url
+                             */
+                            public static getTypeUrl(typeUrlPrefix?: string): string;
+                        }
+                    }
 
                     /** Properties of a ParsingConfig. */
                     interface IParsingConfig {
@@ -17487,6 +19714,9 @@ export namespace google {
 
                         /** ParsingConfig ocrParsingConfig */
                         ocrParsingConfig?: (google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.IOcrParsingConfig|null);
+
+                        /** ParsingConfig layoutParsingConfig */
+                        layoutParsingConfig?: (google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.ILayoutParsingConfig|null);
                     }
 
                     /** Represents a ParsingConfig. */
@@ -17504,8 +19734,11 @@ export namespace google {
                         /** ParsingConfig ocrParsingConfig. */
                         public ocrParsingConfig?: (google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.IOcrParsingConfig|null);
 
+                        /** ParsingConfig layoutParsingConfig. */
+                        public layoutParsingConfig?: (google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.ILayoutParsingConfig|null);
+
                         /** ParsingConfig typeDedicatedConfig. */
-                        public typeDedicatedConfig?: ("digitalParsingConfig"|"ocrParsingConfig");
+                        public typeDedicatedConfig?: ("digitalParsingConfig"|"ocrParsingConfig"|"layoutParsingConfig");
 
                         /**
                          * Creates a new ParsingConfig instance using the specified properties.
@@ -17780,6 +20013,97 @@ export namespace google {
                              */
                             public static getTypeUrl(typeUrlPrefix?: string): string;
                         }
+
+                        /** Properties of a LayoutParsingConfig. */
+                        interface ILayoutParsingConfig {
+                        }
+
+                        /** Represents a LayoutParsingConfig. */
+                        class LayoutParsingConfig implements ILayoutParsingConfig {
+
+                            /**
+                             * Constructs a new LayoutParsingConfig.
+                             * @param [properties] Properties to set
+                             */
+                            constructor(properties?: google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.ILayoutParsingConfig);
+
+                            /**
+                             * Creates a new LayoutParsingConfig instance using the specified properties.
+                             * @param [properties] Properties to set
+                             * @returns LayoutParsingConfig instance
+                             */
+                            public static create(properties?: google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.ILayoutParsingConfig): google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig;
+
+                            /**
+                             * Encodes the specified LayoutParsingConfig message. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig.verify|verify} messages.
+                             * @param message LayoutParsingConfig message or plain object to encode
+                             * @param [writer] Writer to encode to
+                             * @returns Writer
+                             */
+                            public static encode(message: google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.ILayoutParsingConfig, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                            /**
+                             * Encodes the specified LayoutParsingConfig message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig.verify|verify} messages.
+                             * @param message LayoutParsingConfig message or plain object to encode
+                             * @param [writer] Writer to encode to
+                             * @returns Writer
+                             */
+                            public static encodeDelimited(message: google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.ILayoutParsingConfig, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                            /**
+                             * Decodes a LayoutParsingConfig message from the specified reader or buffer.
+                             * @param reader Reader or buffer to decode from
+                             * @param [length] Message length if known beforehand
+                             * @returns LayoutParsingConfig
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig;
+
+                            /**
+                             * Decodes a LayoutParsingConfig message from the specified reader or buffer, length delimited.
+                             * @param reader Reader or buffer to decode from
+                             * @returns LayoutParsingConfig
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig;
+
+                            /**
+                             * Verifies a LayoutParsingConfig message.
+                             * @param message Plain object to verify
+                             * @returns `null` if valid, otherwise the reason why it is not
+                             */
+                            public static verify(message: { [k: string]: any }): (string|null);
+
+                            /**
+                             * Creates a LayoutParsingConfig message from a plain object. Also converts values to their respective internal types.
+                             * @param object Plain object
+                             * @returns LayoutParsingConfig
+                             */
+                            public static fromObject(object: { [k: string]: any }): google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig;
+
+                            /**
+                             * Creates a plain object from a LayoutParsingConfig message. Also converts values to other types if specified.
+                             * @param message LayoutParsingConfig
+                             * @param [options] Conversion options
+                             * @returns Plain object
+                             */
+                            public static toObject(message: google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                            /**
+                             * Converts this LayoutParsingConfig to JSON.
+                             * @returns JSON object
+                             */
+                            public toJSON(): { [k: string]: any };
+
+                            /**
+                             * Gets the default type url for LayoutParsingConfig
+                             * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                             * @returns The default type url
+                             */
+                            public static getTypeUrl(typeUrlPrefix?: string): string;
+                        }
                     }
                 }
 
diff --git a/packages/google-cloud-discoveryengine/protos/protos.js b/packages/google-cloud-discoveryengine/protos/protos.js
index 257c9be5a3a..6b2b3d3acc1 100644
--- a/packages/google-cloud-discoveryengine/protos/protos.js
+++ b/packages/google-cloud-discoveryengine/protos/protos.js
@@ -442,6 +442,7 @@
                                     case 2:
                                     case 3:
                                     case 4:
+                                    case 5:
                                         break;
                                     }
                             }
@@ -571,6 +572,10 @@
                                     case 4:
                                         message.answerSkippedReasons[i] = 4;
                                         break;
+                                    case "NO_RELEVANT_CONTENT":
+                                    case 5:
+                                        message.answerSkippedReasons[i] = 5;
+                                        break;
                                     }
                             }
                             if (object.createTime != null) {
@@ -3602,6 +3607,7 @@
                                          * @property {string|null} [title] SearchResult title
                                          * @property {Array.<google.cloud.discoveryengine.v1.Answer.Step.Action.Observation.SearchResult.ISnippetInfo>|null} [snippetInfo] SearchResult snippetInfo
                                          * @property {Array.<google.cloud.discoveryengine.v1.Answer.Step.Action.Observation.SearchResult.IChunkInfo>|null} [chunkInfo] SearchResult chunkInfo
+                                         * @property {google.protobuf.IStruct|null} [structData] SearchResult structData
                                          */
     
                                         /**
@@ -3661,6 +3667,14 @@
                                          */
                                         SearchResult.prototype.chunkInfo = $util.emptyArray;
     
+                                        /**
+                                         * SearchResult structData.
+                                         * @member {google.protobuf.IStruct|null|undefined} structData
+                                         * @memberof google.cloud.discoveryengine.v1.Answer.Step.Action.Observation.SearchResult
+                                         * @instance
+                                         */
+                                        SearchResult.prototype.structData = null;
+    
                                         /**
                                          * Creates a new SearchResult instance using the specified properties.
                                          * @function create
@@ -3697,6 +3711,8 @@
                                             if (message.chunkInfo != null && message.chunkInfo.length)
                                                 for (var i = 0; i < message.chunkInfo.length; ++i)
                                                     $root.google.cloud.discoveryengine.v1.Answer.Step.Action.Observation.SearchResult.ChunkInfo.encode(message.chunkInfo[i], writer.uint32(/* id 5, wireType 2 =*/42).fork()).ldelim();
+                                            if (message.structData != null && Object.hasOwnProperty.call(message, "structData"))
+                                                $root.google.protobuf.Struct.encode(message.structData, writer.uint32(/* id 6, wireType 2 =*/50).fork()).ldelim();
                                             return writer;
                                         };
     
@@ -3755,6 +3771,10 @@
                                                         message.chunkInfo.push($root.google.cloud.discoveryengine.v1.Answer.Step.Action.Observation.SearchResult.ChunkInfo.decode(reader, reader.uint32()));
                                                         break;
                                                     }
+                                                case 6: {
+                                                        message.structData = $root.google.protobuf.Struct.decode(reader, reader.uint32());
+                                                        break;
+                                                    }
                                                 default:
                                                     reader.skipType(tag & 7);
                                                     break;
@@ -3817,6 +3837,11 @@
                                                         return "chunkInfo." + error;
                                                 }
                                             }
+                                            if (message.structData != null && message.hasOwnProperty("structData")) {
+                                                var error = $root.google.protobuf.Struct.verify(message.structData);
+                                                if (error)
+                                                    return "structData." + error;
+                                            }
                                             return null;
                                         };
     
@@ -3858,6 +3883,11 @@
                                                     message.chunkInfo[i] = $root.google.cloud.discoveryengine.v1.Answer.Step.Action.Observation.SearchResult.ChunkInfo.fromObject(object.chunkInfo[i]);
                                                 }
                                             }
+                                            if (object.structData != null) {
+                                                if (typeof object.structData !== "object")
+                                                    throw TypeError(".google.cloud.discoveryengine.v1.Answer.Step.Action.Observation.SearchResult.structData: object expected");
+                                                message.structData = $root.google.protobuf.Struct.fromObject(object.structData);
+                                            }
                                             return message;
                                         };
     
@@ -3882,6 +3912,7 @@
                                                 object.document = "";
                                                 object.uri = "";
                                                 object.title = "";
+                                                object.structData = null;
                                             }
                                             if (message.document != null && message.hasOwnProperty("document"))
                                                 object.document = message.document;
@@ -3899,6 +3930,8 @@
                                                 for (var j = 0; j < message.chunkInfo.length; ++j)
                                                     object.chunkInfo[j] = $root.google.cloud.discoveryengine.v1.Answer.Step.Action.Observation.SearchResult.ChunkInfo.toObject(message.chunkInfo[j], options);
                                             }
+                                            if (message.structData != null && message.hasOwnProperty("structData"))
+                                                object.structData = $root.google.protobuf.Struct.toObject(message.structData, options);
                                             return object;
                                         };
     
@@ -4972,6 +5005,7 @@
                          * @property {number} NON_ANSWER_SEEKING_QUERY_IGNORED=2 NON_ANSWER_SEEKING_QUERY_IGNORED value
                          * @property {number} OUT_OF_DOMAIN_QUERY_IGNORED=3 OUT_OF_DOMAIN_QUERY_IGNORED value
                          * @property {number} POTENTIAL_POLICY_VIOLATION=4 POTENTIAL_POLICY_VIOLATION value
+                         * @property {number} NO_RELEVANT_CONTENT=5 NO_RELEVANT_CONTENT value
                          */
                         Answer.AnswerSkippedReason = (function() {
                             var valuesById = {}, values = Object.create(valuesById);
@@ -4980,117 +5014,38 @@
                             values[valuesById[2] = "NON_ANSWER_SEEKING_QUERY_IGNORED"] = 2;
                             values[valuesById[3] = "OUT_OF_DOMAIN_QUERY_IGNORED"] = 3;
                             values[valuesById[4] = "POTENTIAL_POLICY_VIOLATION"] = 4;
+                            values[valuesById[5] = "NO_RELEVANT_CONTENT"] = 5;
                             return values;
                         })();
     
                         return Answer;
                     })();
     
-                    /**
-                     * IndustryVertical enum.
-                     * @name google.cloud.discoveryengine.v1.IndustryVertical
-                     * @enum {number}
-                     * @property {number} INDUSTRY_VERTICAL_UNSPECIFIED=0 INDUSTRY_VERTICAL_UNSPECIFIED value
-                     * @property {number} GENERIC=1 GENERIC value
-                     * @property {number} MEDIA=2 MEDIA value
-                     * @property {number} HEALTHCARE_FHIR=7 HEALTHCARE_FHIR value
-                     */
-                    v1.IndustryVertical = (function() {
-                        var valuesById = {}, values = Object.create(valuesById);
-                        values[valuesById[0] = "INDUSTRY_VERTICAL_UNSPECIFIED"] = 0;
-                        values[valuesById[1] = "GENERIC"] = 1;
-                        values[valuesById[2] = "MEDIA"] = 2;
-                        values[valuesById[7] = "HEALTHCARE_FHIR"] = 7;
-                        return values;
-                    })();
-    
-                    /**
-                     * SolutionType enum.
-                     * @name google.cloud.discoveryengine.v1.SolutionType
-                     * @enum {number}
-                     * @property {number} SOLUTION_TYPE_UNSPECIFIED=0 SOLUTION_TYPE_UNSPECIFIED value
-                     * @property {number} SOLUTION_TYPE_RECOMMENDATION=1 SOLUTION_TYPE_RECOMMENDATION value
-                     * @property {number} SOLUTION_TYPE_SEARCH=2 SOLUTION_TYPE_SEARCH value
-                     * @property {number} SOLUTION_TYPE_CHAT=3 SOLUTION_TYPE_CHAT value
-                     * @property {number} SOLUTION_TYPE_GENERATIVE_CHAT=4 SOLUTION_TYPE_GENERATIVE_CHAT value
-                     */
-                    v1.SolutionType = (function() {
-                        var valuesById = {}, values = Object.create(valuesById);
-                        values[valuesById[0] = "SOLUTION_TYPE_UNSPECIFIED"] = 0;
-                        values[valuesById[1] = "SOLUTION_TYPE_RECOMMENDATION"] = 1;
-                        values[valuesById[2] = "SOLUTION_TYPE_SEARCH"] = 2;
-                        values[valuesById[3] = "SOLUTION_TYPE_CHAT"] = 3;
-                        values[valuesById[4] = "SOLUTION_TYPE_GENERATIVE_CHAT"] = 4;
-                        return values;
-                    })();
-    
-                    /**
-                     * SearchUseCase enum.
-                     * @name google.cloud.discoveryengine.v1.SearchUseCase
-                     * @enum {number}
-                     * @property {number} SEARCH_USE_CASE_UNSPECIFIED=0 SEARCH_USE_CASE_UNSPECIFIED value
-                     * @property {number} SEARCH_USE_CASE_SEARCH=1 SEARCH_USE_CASE_SEARCH value
-                     * @property {number} SEARCH_USE_CASE_BROWSE=2 SEARCH_USE_CASE_BROWSE value
-                     */
-                    v1.SearchUseCase = (function() {
-                        var valuesById = {}, values = Object.create(valuesById);
-                        values[valuesById[0] = "SEARCH_USE_CASE_UNSPECIFIED"] = 0;
-                        values[valuesById[1] = "SEARCH_USE_CASE_SEARCH"] = 1;
-                        values[valuesById[2] = "SEARCH_USE_CASE_BROWSE"] = 2;
-                        return values;
-                    })();
-    
-                    /**
-                     * SearchTier enum.
-                     * @name google.cloud.discoveryengine.v1.SearchTier
-                     * @enum {number}
-                     * @property {number} SEARCH_TIER_UNSPECIFIED=0 SEARCH_TIER_UNSPECIFIED value
-                     * @property {number} SEARCH_TIER_STANDARD=1 SEARCH_TIER_STANDARD value
-                     * @property {number} SEARCH_TIER_ENTERPRISE=2 SEARCH_TIER_ENTERPRISE value
-                     */
-                    v1.SearchTier = (function() {
-                        var valuesById = {}, values = Object.create(valuesById);
-                        values[valuesById[0] = "SEARCH_TIER_UNSPECIFIED"] = 0;
-                        values[valuesById[1] = "SEARCH_TIER_STANDARD"] = 1;
-                        values[valuesById[2] = "SEARCH_TIER_ENTERPRISE"] = 2;
-                        return values;
-                    })();
-    
-                    /**
-                     * SearchAddOn enum.
-                     * @name google.cloud.discoveryengine.v1.SearchAddOn
-                     * @enum {number}
-                     * @property {number} SEARCH_ADD_ON_UNSPECIFIED=0 SEARCH_ADD_ON_UNSPECIFIED value
-                     * @property {number} SEARCH_ADD_ON_LLM=1 SEARCH_ADD_ON_LLM value
-                     */
-                    v1.SearchAddOn = (function() {
-                        var valuesById = {}, values = Object.create(valuesById);
-                        values[valuesById[0] = "SEARCH_ADD_ON_UNSPECIFIED"] = 0;
-                        values[valuesById[1] = "SEARCH_ADD_ON_LLM"] = 1;
-                        return values;
-                    })();
-    
-                    v1.Interval = (function() {
+                    v1.Chunk = (function() {
     
                         /**
-                         * Properties of an Interval.
+                         * Properties of a Chunk.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IInterval
-                         * @property {number|null} [minimum] Interval minimum
-                         * @property {number|null} [exclusiveMinimum] Interval exclusiveMinimum
-                         * @property {number|null} [maximum] Interval maximum
-                         * @property {number|null} [exclusiveMaximum] Interval exclusiveMaximum
+                         * @interface IChunk
+                         * @property {string|null} [name] Chunk name
+                         * @property {string|null} [id] Chunk id
+                         * @property {string|null} [content] Chunk content
+                         * @property {number|null} [relevanceScore] Chunk relevanceScore
+                         * @property {google.cloud.discoveryengine.v1.Chunk.IDocumentMetadata|null} [documentMetadata] Chunk documentMetadata
+                         * @property {google.protobuf.IStruct|null} [derivedStructData] Chunk derivedStructData
+                         * @property {google.cloud.discoveryengine.v1.Chunk.IPageSpan|null} [pageSpan] Chunk pageSpan
+                         * @property {google.cloud.discoveryengine.v1.Chunk.IChunkMetadata|null} [chunkMetadata] Chunk chunkMetadata
                          */
     
                         /**
-                         * Constructs a new Interval.
+                         * Constructs a new Chunk.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents an Interval.
-                         * @implements IInterval
+                         * @classdesc Represents a Chunk.
+                         * @implements IChunk
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IInterval=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IChunk=} [properties] Properties to set
                          */
-                        function Interval(properties) {
+                        function Chunk(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -5098,142 +5053,187 @@
                         }
     
                         /**
-                         * Interval minimum.
-                         * @member {number|null|undefined} minimum
-                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * Chunk name.
+                         * @member {string} name
+                         * @memberof google.cloud.discoveryengine.v1.Chunk
                          * @instance
                          */
-                        Interval.prototype.minimum = null;
+                        Chunk.prototype.name = "";
     
                         /**
-                         * Interval exclusiveMinimum.
-                         * @member {number|null|undefined} exclusiveMinimum
-                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * Chunk id.
+                         * @member {string} id
+                         * @memberof google.cloud.discoveryengine.v1.Chunk
                          * @instance
                          */
-                        Interval.prototype.exclusiveMinimum = null;
+                        Chunk.prototype.id = "";
     
                         /**
-                         * Interval maximum.
-                         * @member {number|null|undefined} maximum
-                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * Chunk content.
+                         * @member {string} content
+                         * @memberof google.cloud.discoveryengine.v1.Chunk
                          * @instance
                          */
-                        Interval.prototype.maximum = null;
+                        Chunk.prototype.content = "";
     
                         /**
-                         * Interval exclusiveMaximum.
-                         * @member {number|null|undefined} exclusiveMaximum
-                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * Chunk relevanceScore.
+                         * @member {number|null|undefined} relevanceScore
+                         * @memberof google.cloud.discoveryengine.v1.Chunk
                          * @instance
                          */
-                        Interval.prototype.exclusiveMaximum = null;
+                        Chunk.prototype.relevanceScore = null;
     
-                        // OneOf field names bound to virtual getters and setters
-                        var $oneOfFields;
+                        /**
+                         * Chunk documentMetadata.
+                         * @member {google.cloud.discoveryengine.v1.Chunk.IDocumentMetadata|null|undefined} documentMetadata
+                         * @memberof google.cloud.discoveryengine.v1.Chunk
+                         * @instance
+                         */
+                        Chunk.prototype.documentMetadata = null;
     
                         /**
-                         * Interval min.
-                         * @member {"minimum"|"exclusiveMinimum"|undefined} min
-                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * Chunk derivedStructData.
+                         * @member {google.protobuf.IStruct|null|undefined} derivedStructData
+                         * @memberof google.cloud.discoveryengine.v1.Chunk
                          * @instance
                          */
-                        Object.defineProperty(Interval.prototype, "min", {
-                            get: $util.oneOfGetter($oneOfFields = ["minimum", "exclusiveMinimum"]),
-                            set: $util.oneOfSetter($oneOfFields)
-                        });
+                        Chunk.prototype.derivedStructData = null;
     
                         /**
-                         * Interval max.
-                         * @member {"maximum"|"exclusiveMaximum"|undefined} max
-                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * Chunk pageSpan.
+                         * @member {google.cloud.discoveryengine.v1.Chunk.IPageSpan|null|undefined} pageSpan
+                         * @memberof google.cloud.discoveryengine.v1.Chunk
                          * @instance
                          */
-                        Object.defineProperty(Interval.prototype, "max", {
-                            get: $util.oneOfGetter($oneOfFields = ["maximum", "exclusiveMaximum"]),
+                        Chunk.prototype.pageSpan = null;
+    
+                        /**
+                         * Chunk chunkMetadata.
+                         * @member {google.cloud.discoveryengine.v1.Chunk.IChunkMetadata|null|undefined} chunkMetadata
+                         * @memberof google.cloud.discoveryengine.v1.Chunk
+                         * @instance
+                         */
+                        Chunk.prototype.chunkMetadata = null;
+    
+                        // OneOf field names bound to virtual getters and setters
+                        var $oneOfFields;
+    
+                        /**
+                         * Chunk _relevanceScore.
+                         * @member {"relevanceScore"|undefined} _relevanceScore
+                         * @memberof google.cloud.discoveryengine.v1.Chunk
+                         * @instance
+                         */
+                        Object.defineProperty(Chunk.prototype, "_relevanceScore", {
+                            get: $util.oneOfGetter($oneOfFields = ["relevanceScore"]),
                             set: $util.oneOfSetter($oneOfFields)
                         });
     
                         /**
-                         * Creates a new Interval instance using the specified properties.
+                         * Creates a new Chunk instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @memberof google.cloud.discoveryengine.v1.Chunk
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IInterval=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.Interval} Interval instance
+                         * @param {google.cloud.discoveryengine.v1.IChunk=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.Chunk} Chunk instance
                          */
-                        Interval.create = function create(properties) {
-                            return new Interval(properties);
+                        Chunk.create = function create(properties) {
+                            return new Chunk(properties);
                         };
     
                         /**
-                         * Encodes the specified Interval message. Does not implicitly {@link google.cloud.discoveryengine.v1.Interval.verify|verify} messages.
+                         * Encodes the specified Chunk message. Does not implicitly {@link google.cloud.discoveryengine.v1.Chunk.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @memberof google.cloud.discoveryengine.v1.Chunk
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IInterval} message Interval message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IChunk} message Chunk message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        Interval.encode = function encode(message, writer) {
+                        Chunk.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.minimum != null && Object.hasOwnProperty.call(message, "minimum"))
-                                writer.uint32(/* id 1, wireType 1 =*/9).double(message.minimum);
-                            if (message.exclusiveMinimum != null && Object.hasOwnProperty.call(message, "exclusiveMinimum"))
-                                writer.uint32(/* id 2, wireType 1 =*/17).double(message.exclusiveMinimum);
-                            if (message.maximum != null && Object.hasOwnProperty.call(message, "maximum"))
-                                writer.uint32(/* id 3, wireType 1 =*/25).double(message.maximum);
-                            if (message.exclusiveMaximum != null && Object.hasOwnProperty.call(message, "exclusiveMaximum"))
-                                writer.uint32(/* id 4, wireType 1 =*/33).double(message.exclusiveMaximum);
+                            if (message.name != null && Object.hasOwnProperty.call(message, "name"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.name);
+                            if (message.id != null && Object.hasOwnProperty.call(message, "id"))
+                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.id);
+                            if (message.content != null && Object.hasOwnProperty.call(message, "content"))
+                                writer.uint32(/* id 3, wireType 2 =*/26).string(message.content);
+                            if (message.derivedStructData != null && Object.hasOwnProperty.call(message, "derivedStructData"))
+                                $root.google.protobuf.Struct.encode(message.derivedStructData, writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
+                            if (message.documentMetadata != null && Object.hasOwnProperty.call(message, "documentMetadata"))
+                                $root.google.cloud.discoveryengine.v1.Chunk.DocumentMetadata.encode(message.documentMetadata, writer.uint32(/* id 5, wireType 2 =*/42).fork()).ldelim();
+                            if (message.pageSpan != null && Object.hasOwnProperty.call(message, "pageSpan"))
+                                $root.google.cloud.discoveryengine.v1.Chunk.PageSpan.encode(message.pageSpan, writer.uint32(/* id 6, wireType 2 =*/50).fork()).ldelim();
+                            if (message.chunkMetadata != null && Object.hasOwnProperty.call(message, "chunkMetadata"))
+                                $root.google.cloud.discoveryengine.v1.Chunk.ChunkMetadata.encode(message.chunkMetadata, writer.uint32(/* id 7, wireType 2 =*/58).fork()).ldelim();
+                            if (message.relevanceScore != null && Object.hasOwnProperty.call(message, "relevanceScore"))
+                                writer.uint32(/* id 8, wireType 1 =*/65).double(message.relevanceScore);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified Interval message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.Interval.verify|verify} messages.
+                         * Encodes the specified Chunk message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.Chunk.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @memberof google.cloud.discoveryengine.v1.Chunk
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IInterval} message Interval message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IChunk} message Chunk message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        Interval.encodeDelimited = function encodeDelimited(message, writer) {
+                        Chunk.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes an Interval message from the specified reader or buffer.
+                         * Decodes a Chunk message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @memberof google.cloud.discoveryengine.v1.Chunk
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.Interval} Interval
+                         * @returns {google.cloud.discoveryengine.v1.Chunk} Chunk
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        Interval.decode = function decode(reader, length) {
+                        Chunk.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.Interval();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.Chunk();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 1: {
-                                        message.minimum = reader.double();
+                                        message.name = reader.string();
                                         break;
                                     }
                                 case 2: {
-                                        message.exclusiveMinimum = reader.double();
+                                        message.id = reader.string();
                                         break;
                                     }
                                 case 3: {
-                                        message.maximum = reader.double();
+                                        message.content = reader.string();
+                                        break;
+                                    }
+                                case 8: {
+                                        message.relevanceScore = reader.double();
+                                        break;
+                                    }
+                                case 5: {
+                                        message.documentMetadata = $root.google.cloud.discoveryengine.v1.Chunk.DocumentMetadata.decode(reader, reader.uint32());
                                         break;
                                     }
                                 case 4: {
-                                        message.exclusiveMaximum = reader.double();
+                                        message.derivedStructData = $root.google.protobuf.Struct.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 6: {
+                                        message.pageSpan = $root.google.cloud.discoveryengine.v1.Chunk.PageSpan.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 7: {
+                                        message.chunkMetadata = $root.google.cloud.discoveryengine.v1.Chunk.ChunkMetadata.decode(reader, reader.uint32());
                                         break;
                                     }
                                 default:
@@ -5245,273 +5245,3593 @@
                         };
     
                         /**
-                         * Decodes an Interval message from the specified reader or buffer, length delimited.
+                         * Decodes a Chunk message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @memberof google.cloud.discoveryengine.v1.Chunk
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.Interval} Interval
+                         * @returns {google.cloud.discoveryengine.v1.Chunk} Chunk
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        Interval.decodeDelimited = function decodeDelimited(reader) {
+                        Chunk.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies an Interval message.
+                         * Verifies a Chunk message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @memberof google.cloud.discoveryengine.v1.Chunk
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        Interval.verify = function verify(message) {
+                        Chunk.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
                             var properties = {};
-                            if (message.minimum != null && message.hasOwnProperty("minimum")) {
-                                properties.min = 1;
-                                if (typeof message.minimum !== "number")
-                                    return "minimum: number expected";
+                            if (message.name != null && message.hasOwnProperty("name"))
+                                if (!$util.isString(message.name))
+                                    return "name: string expected";
+                            if (message.id != null && message.hasOwnProperty("id"))
+                                if (!$util.isString(message.id))
+                                    return "id: string expected";
+                            if (message.content != null && message.hasOwnProperty("content"))
+                                if (!$util.isString(message.content))
+                                    return "content: string expected";
+                            if (message.relevanceScore != null && message.hasOwnProperty("relevanceScore")) {
+                                properties._relevanceScore = 1;
+                                if (typeof message.relevanceScore !== "number")
+                                    return "relevanceScore: number expected";
                             }
-                            if (message.exclusiveMinimum != null && message.hasOwnProperty("exclusiveMinimum")) {
-                                if (properties.min === 1)
-                                    return "min: multiple values";
-                                properties.min = 1;
-                                if (typeof message.exclusiveMinimum !== "number")
-                                    return "exclusiveMinimum: number expected";
+                            if (message.documentMetadata != null && message.hasOwnProperty("documentMetadata")) {
+                                var error = $root.google.cloud.discoveryengine.v1.Chunk.DocumentMetadata.verify(message.documentMetadata);
+                                if (error)
+                                    return "documentMetadata." + error;
                             }
-                            if (message.maximum != null && message.hasOwnProperty("maximum")) {
-                                properties.max = 1;
-                                if (typeof message.maximum !== "number")
-                                    return "maximum: number expected";
+                            if (message.derivedStructData != null && message.hasOwnProperty("derivedStructData")) {
+                                var error = $root.google.protobuf.Struct.verify(message.derivedStructData);
+                                if (error)
+                                    return "derivedStructData." + error;
                             }
-                            if (message.exclusiveMaximum != null && message.hasOwnProperty("exclusiveMaximum")) {
-                                if (properties.max === 1)
-                                    return "max: multiple values";
-                                properties.max = 1;
-                                if (typeof message.exclusiveMaximum !== "number")
-                                    return "exclusiveMaximum: number expected";
+                            if (message.pageSpan != null && message.hasOwnProperty("pageSpan")) {
+                                var error = $root.google.cloud.discoveryengine.v1.Chunk.PageSpan.verify(message.pageSpan);
+                                if (error)
+                                    return "pageSpan." + error;
+                            }
+                            if (message.chunkMetadata != null && message.hasOwnProperty("chunkMetadata")) {
+                                var error = $root.google.cloud.discoveryengine.v1.Chunk.ChunkMetadata.verify(message.chunkMetadata);
+                                if (error)
+                                    return "chunkMetadata." + error;
                             }
                             return null;
                         };
     
                         /**
-                         * Creates an Interval message from a plain object. Also converts values to their respective internal types.
+                         * Creates a Chunk message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @memberof google.cloud.discoveryengine.v1.Chunk
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.Interval} Interval
+                         * @returns {google.cloud.discoveryengine.v1.Chunk} Chunk
                          */
-                        Interval.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.Interval)
+                        Chunk.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.Chunk)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.Interval();
-                            if (object.minimum != null)
-                                message.minimum = Number(object.minimum);
-                            if (object.exclusiveMinimum != null)
-                                message.exclusiveMinimum = Number(object.exclusiveMinimum);
-                            if (object.maximum != null)
-                                message.maximum = Number(object.maximum);
-                            if (object.exclusiveMaximum != null)
-                                message.exclusiveMaximum = Number(object.exclusiveMaximum);
+                            var message = new $root.google.cloud.discoveryengine.v1.Chunk();
+                            if (object.name != null)
+                                message.name = String(object.name);
+                            if (object.id != null)
+                                message.id = String(object.id);
+                            if (object.content != null)
+                                message.content = String(object.content);
+                            if (object.relevanceScore != null)
+                                message.relevanceScore = Number(object.relevanceScore);
+                            if (object.documentMetadata != null) {
+                                if (typeof object.documentMetadata !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.Chunk.documentMetadata: object expected");
+                                message.documentMetadata = $root.google.cloud.discoveryengine.v1.Chunk.DocumentMetadata.fromObject(object.documentMetadata);
+                            }
+                            if (object.derivedStructData != null) {
+                                if (typeof object.derivedStructData !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.Chunk.derivedStructData: object expected");
+                                message.derivedStructData = $root.google.protobuf.Struct.fromObject(object.derivedStructData);
+                            }
+                            if (object.pageSpan != null) {
+                                if (typeof object.pageSpan !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.Chunk.pageSpan: object expected");
+                                message.pageSpan = $root.google.cloud.discoveryengine.v1.Chunk.PageSpan.fromObject(object.pageSpan);
+                            }
+                            if (object.chunkMetadata != null) {
+                                if (typeof object.chunkMetadata !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.Chunk.chunkMetadata: object expected");
+                                message.chunkMetadata = $root.google.cloud.discoveryengine.v1.Chunk.ChunkMetadata.fromObject(object.chunkMetadata);
+                            }
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from an Interval message. Also converts values to other types if specified.
+                         * Creates a plain object from a Chunk message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @memberof google.cloud.discoveryengine.v1.Chunk
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.Interval} message Interval
+                         * @param {google.cloud.discoveryengine.v1.Chunk} message Chunk
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        Interval.toObject = function toObject(message, options) {
+                        Chunk.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
-                            if (message.minimum != null && message.hasOwnProperty("minimum")) {
-                                object.minimum = options.json && !isFinite(message.minimum) ? String(message.minimum) : message.minimum;
-                                if (options.oneofs)
-                                    object.min = "minimum";
-                            }
-                            if (message.exclusiveMinimum != null && message.hasOwnProperty("exclusiveMinimum")) {
-                                object.exclusiveMinimum = options.json && !isFinite(message.exclusiveMinimum) ? String(message.exclusiveMinimum) : message.exclusiveMinimum;
-                                if (options.oneofs)
-                                    object.min = "exclusiveMinimum";
-                            }
-                            if (message.maximum != null && message.hasOwnProperty("maximum")) {
-                                object.maximum = options.json && !isFinite(message.maximum) ? String(message.maximum) : message.maximum;
-                                if (options.oneofs)
-                                    object.max = "maximum";
+                            if (options.defaults) {
+                                object.name = "";
+                                object.id = "";
+                                object.content = "";
+                                object.derivedStructData = null;
+                                object.documentMetadata = null;
+                                object.pageSpan = null;
+                                object.chunkMetadata = null;
                             }
-                            if (message.exclusiveMaximum != null && message.hasOwnProperty("exclusiveMaximum")) {
-                                object.exclusiveMaximum = options.json && !isFinite(message.exclusiveMaximum) ? String(message.exclusiveMaximum) : message.exclusiveMaximum;
+                            if (message.name != null && message.hasOwnProperty("name"))
+                                object.name = message.name;
+                            if (message.id != null && message.hasOwnProperty("id"))
+                                object.id = message.id;
+                            if (message.content != null && message.hasOwnProperty("content"))
+                                object.content = message.content;
+                            if (message.derivedStructData != null && message.hasOwnProperty("derivedStructData"))
+                                object.derivedStructData = $root.google.protobuf.Struct.toObject(message.derivedStructData, options);
+                            if (message.documentMetadata != null && message.hasOwnProperty("documentMetadata"))
+                                object.documentMetadata = $root.google.cloud.discoveryengine.v1.Chunk.DocumentMetadata.toObject(message.documentMetadata, options);
+                            if (message.pageSpan != null && message.hasOwnProperty("pageSpan"))
+                                object.pageSpan = $root.google.cloud.discoveryengine.v1.Chunk.PageSpan.toObject(message.pageSpan, options);
+                            if (message.chunkMetadata != null && message.hasOwnProperty("chunkMetadata"))
+                                object.chunkMetadata = $root.google.cloud.discoveryengine.v1.Chunk.ChunkMetadata.toObject(message.chunkMetadata, options);
+                            if (message.relevanceScore != null && message.hasOwnProperty("relevanceScore")) {
+                                object.relevanceScore = options.json && !isFinite(message.relevanceScore) ? String(message.relevanceScore) : message.relevanceScore;
                                 if (options.oneofs)
-                                    object.max = "exclusiveMaximum";
+                                    object._relevanceScore = "relevanceScore";
                             }
                             return object;
                         };
     
                         /**
-                         * Converts this Interval to JSON.
+                         * Converts this Chunk to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @memberof google.cloud.discoveryengine.v1.Chunk
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        Interval.prototype.toJSON = function toJSON() {
+                        Chunk.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for Interval
+                         * Gets the default type url for Chunk
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @memberof google.cloud.discoveryengine.v1.Chunk
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        Interval.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        Chunk.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.Interval";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.Chunk";
                         };
     
-                        return Interval;
-                    })();
+                        Chunk.DocumentMetadata = (function() {
     
-                    v1.CustomAttribute = (function() {
+                            /**
+                             * Properties of a DocumentMetadata.
+                             * @memberof google.cloud.discoveryengine.v1.Chunk
+                             * @interface IDocumentMetadata
+                             * @property {string|null} [uri] DocumentMetadata uri
+                             * @property {string|null} [title] DocumentMetadata title
+                             * @property {google.protobuf.IStruct|null} [structData] DocumentMetadata structData
+                             */
     
-                        /**
-                         * Properties of a CustomAttribute.
-                         * @memberof google.cloud.discoveryengine.v1
-                         * @interface ICustomAttribute
-                         * @property {Array.<string>|null} [text] CustomAttribute text
-                         * @property {Array.<number>|null} [numbers] CustomAttribute numbers
-                         */
+                            /**
+                             * Constructs a new DocumentMetadata.
+                             * @memberof google.cloud.discoveryengine.v1.Chunk
+                             * @classdesc Represents a DocumentMetadata.
+                             * @implements IDocumentMetadata
+                             * @constructor
+                             * @param {google.cloud.discoveryengine.v1.Chunk.IDocumentMetadata=} [properties] Properties to set
+                             */
+                            function DocumentMetadata(properties) {
+                                if (properties)
+                                    for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                        if (properties[keys[i]] != null)
+                                            this[keys[i]] = properties[keys[i]];
+                            }
     
-                        /**
-                         * Constructs a new CustomAttribute.
-                         * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a CustomAttribute.
-                         * @implements ICustomAttribute
-                         * @constructor
-                         * @param {google.cloud.discoveryengine.v1.ICustomAttribute=} [properties] Properties to set
-                         */
-                        function CustomAttribute(properties) {
-                            this.text = [];
-                            this.numbers = [];
-                            if (properties)
-                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
-                                    if (properties[keys[i]] != null)
-                                        this[keys[i]] = properties[keys[i]];
-                        }
+                            /**
+                             * DocumentMetadata uri.
+                             * @member {string} uri
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.DocumentMetadata
+                             * @instance
+                             */
+                            DocumentMetadata.prototype.uri = "";
     
-                        /**
-                         * CustomAttribute text.
-                         * @member {Array.<string>} text
-                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
-                         * @instance
-                         */
-                        CustomAttribute.prototype.text = $util.emptyArray;
+                            /**
+                             * DocumentMetadata title.
+                             * @member {string} title
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.DocumentMetadata
+                             * @instance
+                             */
+                            DocumentMetadata.prototype.title = "";
     
-                        /**
-                         * CustomAttribute numbers.
-                         * @member {Array.<number>} numbers
-                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
-                         * @instance
-                         */
-                        CustomAttribute.prototype.numbers = $util.emptyArray;
+                            /**
+                             * DocumentMetadata structData.
+                             * @member {google.protobuf.IStruct|null|undefined} structData
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.DocumentMetadata
+                             * @instance
+                             */
+                            DocumentMetadata.prototype.structData = null;
     
-                        /**
-                         * Creates a new CustomAttribute instance using the specified properties.
-                         * @function create
-                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
-                         * @static
-                         * @param {google.cloud.discoveryengine.v1.ICustomAttribute=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.CustomAttribute} CustomAttribute instance
-                         */
-                        CustomAttribute.create = function create(properties) {
-                            return new CustomAttribute(properties);
-                        };
+                            /**
+                             * Creates a new DocumentMetadata instance using the specified properties.
+                             * @function create
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.DocumentMetadata
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.Chunk.IDocumentMetadata=} [properties] Properties to set
+                             * @returns {google.cloud.discoveryengine.v1.Chunk.DocumentMetadata} DocumentMetadata instance
+                             */
+                            DocumentMetadata.create = function create(properties) {
+                                return new DocumentMetadata(properties);
+                            };
     
-                        /**
-                         * Encodes the specified CustomAttribute message. Does not implicitly {@link google.cloud.discoveryengine.v1.CustomAttribute.verify|verify} messages.
-                         * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
-                         * @static
-                         * @param {google.cloud.discoveryengine.v1.ICustomAttribute} message CustomAttribute message or plain object to encode
+                            /**
+                             * Encodes the specified DocumentMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.Chunk.DocumentMetadata.verify|verify} messages.
+                             * @function encode
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.DocumentMetadata
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.Chunk.IDocumentMetadata} message DocumentMetadata message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            DocumentMetadata.encode = function encode(message, writer) {
+                                if (!writer)
+                                    writer = $Writer.create();
+                                if (message.uri != null && Object.hasOwnProperty.call(message, "uri"))
+                                    writer.uint32(/* id 1, wireType 2 =*/10).string(message.uri);
+                                if (message.title != null && Object.hasOwnProperty.call(message, "title"))
+                                    writer.uint32(/* id 2, wireType 2 =*/18).string(message.title);
+                                if (message.structData != null && Object.hasOwnProperty.call(message, "structData"))
+                                    $root.google.protobuf.Struct.encode(message.structData, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
+                                return writer;
+                            };
+    
+                            /**
+                             * Encodes the specified DocumentMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.Chunk.DocumentMetadata.verify|verify} messages.
+                             * @function encodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.DocumentMetadata
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.Chunk.IDocumentMetadata} message DocumentMetadata message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            DocumentMetadata.encodeDelimited = function encodeDelimited(message, writer) {
+                                return this.encode(message, writer).ldelim();
+                            };
+    
+                            /**
+                             * Decodes a DocumentMetadata message from the specified reader or buffer.
+                             * @function decode
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.DocumentMetadata
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @param {number} [length] Message length if known beforehand
+                             * @returns {google.cloud.discoveryengine.v1.Chunk.DocumentMetadata} DocumentMetadata
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            DocumentMetadata.decode = function decode(reader, length) {
+                                if (!(reader instanceof $Reader))
+                                    reader = $Reader.create(reader);
+                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.Chunk.DocumentMetadata();
+                                while (reader.pos < end) {
+                                    var tag = reader.uint32();
+                                    switch (tag >>> 3) {
+                                    case 1: {
+                                            message.uri = reader.string();
+                                            break;
+                                        }
+                                    case 2: {
+                                            message.title = reader.string();
+                                            break;
+                                        }
+                                    case 3: {
+                                            message.structData = $root.google.protobuf.Struct.decode(reader, reader.uint32());
+                                            break;
+                                        }
+                                    default:
+                                        reader.skipType(tag & 7);
+                                        break;
+                                    }
+                                }
+                                return message;
+                            };
+    
+                            /**
+                             * Decodes a DocumentMetadata message from the specified reader or buffer, length delimited.
+                             * @function decodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.DocumentMetadata
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @returns {google.cloud.discoveryengine.v1.Chunk.DocumentMetadata} DocumentMetadata
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            DocumentMetadata.decodeDelimited = function decodeDelimited(reader) {
+                                if (!(reader instanceof $Reader))
+                                    reader = new $Reader(reader);
+                                return this.decode(reader, reader.uint32());
+                            };
+    
+                            /**
+                             * Verifies a DocumentMetadata message.
+                             * @function verify
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.DocumentMetadata
+                             * @static
+                             * @param {Object.<string,*>} message Plain object to verify
+                             * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                             */
+                            DocumentMetadata.verify = function verify(message) {
+                                if (typeof message !== "object" || message === null)
+                                    return "object expected";
+                                if (message.uri != null && message.hasOwnProperty("uri"))
+                                    if (!$util.isString(message.uri))
+                                        return "uri: string expected";
+                                if (message.title != null && message.hasOwnProperty("title"))
+                                    if (!$util.isString(message.title))
+                                        return "title: string expected";
+                                if (message.structData != null && message.hasOwnProperty("structData")) {
+                                    var error = $root.google.protobuf.Struct.verify(message.structData);
+                                    if (error)
+                                        return "structData." + error;
+                                }
+                                return null;
+                            };
+    
+                            /**
+                             * Creates a DocumentMetadata message from a plain object. Also converts values to their respective internal types.
+                             * @function fromObject
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.DocumentMetadata
+                             * @static
+                             * @param {Object.<string,*>} object Plain object
+                             * @returns {google.cloud.discoveryengine.v1.Chunk.DocumentMetadata} DocumentMetadata
+                             */
+                            DocumentMetadata.fromObject = function fromObject(object) {
+                                if (object instanceof $root.google.cloud.discoveryengine.v1.Chunk.DocumentMetadata)
+                                    return object;
+                                var message = new $root.google.cloud.discoveryengine.v1.Chunk.DocumentMetadata();
+                                if (object.uri != null)
+                                    message.uri = String(object.uri);
+                                if (object.title != null)
+                                    message.title = String(object.title);
+                                if (object.structData != null) {
+                                    if (typeof object.structData !== "object")
+                                        throw TypeError(".google.cloud.discoveryengine.v1.Chunk.DocumentMetadata.structData: object expected");
+                                    message.structData = $root.google.protobuf.Struct.fromObject(object.structData);
+                                }
+                                return message;
+                            };
+    
+                            /**
+                             * Creates a plain object from a DocumentMetadata message. Also converts values to other types if specified.
+                             * @function toObject
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.DocumentMetadata
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.Chunk.DocumentMetadata} message DocumentMetadata
+                             * @param {$protobuf.IConversionOptions} [options] Conversion options
+                             * @returns {Object.<string,*>} Plain object
+                             */
+                            DocumentMetadata.toObject = function toObject(message, options) {
+                                if (!options)
+                                    options = {};
+                                var object = {};
+                                if (options.defaults) {
+                                    object.uri = "";
+                                    object.title = "";
+                                    object.structData = null;
+                                }
+                                if (message.uri != null && message.hasOwnProperty("uri"))
+                                    object.uri = message.uri;
+                                if (message.title != null && message.hasOwnProperty("title"))
+                                    object.title = message.title;
+                                if (message.structData != null && message.hasOwnProperty("structData"))
+                                    object.structData = $root.google.protobuf.Struct.toObject(message.structData, options);
+                                return object;
+                            };
+    
+                            /**
+                             * Converts this DocumentMetadata to JSON.
+                             * @function toJSON
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.DocumentMetadata
+                             * @instance
+                             * @returns {Object.<string,*>} JSON object
+                             */
+                            DocumentMetadata.prototype.toJSON = function toJSON() {
+                                return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                            };
+    
+                            /**
+                             * Gets the default type url for DocumentMetadata
+                             * @function getTypeUrl
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.DocumentMetadata
+                             * @static
+                             * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                             * @returns {string} The default type url
+                             */
+                            DocumentMetadata.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                                if (typeUrlPrefix === undefined) {
+                                    typeUrlPrefix = "type.googleapis.com";
+                                }
+                                return typeUrlPrefix + "/google.cloud.discoveryengine.v1.Chunk.DocumentMetadata";
+                            };
+    
+                            return DocumentMetadata;
+                        })();
+    
+                        Chunk.PageSpan = (function() {
+    
+                            /**
+                             * Properties of a PageSpan.
+                             * @memberof google.cloud.discoveryengine.v1.Chunk
+                             * @interface IPageSpan
+                             * @property {number|null} [pageStart] PageSpan pageStart
+                             * @property {number|null} [pageEnd] PageSpan pageEnd
+                             */
+    
+                            /**
+                             * Constructs a new PageSpan.
+                             * @memberof google.cloud.discoveryengine.v1.Chunk
+                             * @classdesc Represents a PageSpan.
+                             * @implements IPageSpan
+                             * @constructor
+                             * @param {google.cloud.discoveryengine.v1.Chunk.IPageSpan=} [properties] Properties to set
+                             */
+                            function PageSpan(properties) {
+                                if (properties)
+                                    for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                        if (properties[keys[i]] != null)
+                                            this[keys[i]] = properties[keys[i]];
+                            }
+    
+                            /**
+                             * PageSpan pageStart.
+                             * @member {number} pageStart
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.PageSpan
+                             * @instance
+                             */
+                            PageSpan.prototype.pageStart = 0;
+    
+                            /**
+                             * PageSpan pageEnd.
+                             * @member {number} pageEnd
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.PageSpan
+                             * @instance
+                             */
+                            PageSpan.prototype.pageEnd = 0;
+    
+                            /**
+                             * Creates a new PageSpan instance using the specified properties.
+                             * @function create
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.PageSpan
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.Chunk.IPageSpan=} [properties] Properties to set
+                             * @returns {google.cloud.discoveryengine.v1.Chunk.PageSpan} PageSpan instance
+                             */
+                            PageSpan.create = function create(properties) {
+                                return new PageSpan(properties);
+                            };
+    
+                            /**
+                             * Encodes the specified PageSpan message. Does not implicitly {@link google.cloud.discoveryengine.v1.Chunk.PageSpan.verify|verify} messages.
+                             * @function encode
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.PageSpan
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.Chunk.IPageSpan} message PageSpan message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            PageSpan.encode = function encode(message, writer) {
+                                if (!writer)
+                                    writer = $Writer.create();
+                                if (message.pageStart != null && Object.hasOwnProperty.call(message, "pageStart"))
+                                    writer.uint32(/* id 1, wireType 0 =*/8).int32(message.pageStart);
+                                if (message.pageEnd != null && Object.hasOwnProperty.call(message, "pageEnd"))
+                                    writer.uint32(/* id 2, wireType 0 =*/16).int32(message.pageEnd);
+                                return writer;
+                            };
+    
+                            /**
+                             * Encodes the specified PageSpan message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.Chunk.PageSpan.verify|verify} messages.
+                             * @function encodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.PageSpan
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.Chunk.IPageSpan} message PageSpan message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            PageSpan.encodeDelimited = function encodeDelimited(message, writer) {
+                                return this.encode(message, writer).ldelim();
+                            };
+    
+                            /**
+                             * Decodes a PageSpan message from the specified reader or buffer.
+                             * @function decode
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.PageSpan
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @param {number} [length] Message length if known beforehand
+                             * @returns {google.cloud.discoveryengine.v1.Chunk.PageSpan} PageSpan
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            PageSpan.decode = function decode(reader, length) {
+                                if (!(reader instanceof $Reader))
+                                    reader = $Reader.create(reader);
+                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.Chunk.PageSpan();
+                                while (reader.pos < end) {
+                                    var tag = reader.uint32();
+                                    switch (tag >>> 3) {
+                                    case 1: {
+                                            message.pageStart = reader.int32();
+                                            break;
+                                        }
+                                    case 2: {
+                                            message.pageEnd = reader.int32();
+                                            break;
+                                        }
+                                    default:
+                                        reader.skipType(tag & 7);
+                                        break;
+                                    }
+                                }
+                                return message;
+                            };
+    
+                            /**
+                             * Decodes a PageSpan message from the specified reader or buffer, length delimited.
+                             * @function decodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.PageSpan
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @returns {google.cloud.discoveryengine.v1.Chunk.PageSpan} PageSpan
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            PageSpan.decodeDelimited = function decodeDelimited(reader) {
+                                if (!(reader instanceof $Reader))
+                                    reader = new $Reader(reader);
+                                return this.decode(reader, reader.uint32());
+                            };
+    
+                            /**
+                             * Verifies a PageSpan message.
+                             * @function verify
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.PageSpan
+                             * @static
+                             * @param {Object.<string,*>} message Plain object to verify
+                             * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                             */
+                            PageSpan.verify = function verify(message) {
+                                if (typeof message !== "object" || message === null)
+                                    return "object expected";
+                                if (message.pageStart != null && message.hasOwnProperty("pageStart"))
+                                    if (!$util.isInteger(message.pageStart))
+                                        return "pageStart: integer expected";
+                                if (message.pageEnd != null && message.hasOwnProperty("pageEnd"))
+                                    if (!$util.isInteger(message.pageEnd))
+                                        return "pageEnd: integer expected";
+                                return null;
+                            };
+    
+                            /**
+                             * Creates a PageSpan message from a plain object. Also converts values to their respective internal types.
+                             * @function fromObject
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.PageSpan
+                             * @static
+                             * @param {Object.<string,*>} object Plain object
+                             * @returns {google.cloud.discoveryengine.v1.Chunk.PageSpan} PageSpan
+                             */
+                            PageSpan.fromObject = function fromObject(object) {
+                                if (object instanceof $root.google.cloud.discoveryengine.v1.Chunk.PageSpan)
+                                    return object;
+                                var message = new $root.google.cloud.discoveryengine.v1.Chunk.PageSpan();
+                                if (object.pageStart != null)
+                                    message.pageStart = object.pageStart | 0;
+                                if (object.pageEnd != null)
+                                    message.pageEnd = object.pageEnd | 0;
+                                return message;
+                            };
+    
+                            /**
+                             * Creates a plain object from a PageSpan message. Also converts values to other types if specified.
+                             * @function toObject
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.PageSpan
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.Chunk.PageSpan} message PageSpan
+                             * @param {$protobuf.IConversionOptions} [options] Conversion options
+                             * @returns {Object.<string,*>} Plain object
+                             */
+                            PageSpan.toObject = function toObject(message, options) {
+                                if (!options)
+                                    options = {};
+                                var object = {};
+                                if (options.defaults) {
+                                    object.pageStart = 0;
+                                    object.pageEnd = 0;
+                                }
+                                if (message.pageStart != null && message.hasOwnProperty("pageStart"))
+                                    object.pageStart = message.pageStart;
+                                if (message.pageEnd != null && message.hasOwnProperty("pageEnd"))
+                                    object.pageEnd = message.pageEnd;
+                                return object;
+                            };
+    
+                            /**
+                             * Converts this PageSpan to JSON.
+                             * @function toJSON
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.PageSpan
+                             * @instance
+                             * @returns {Object.<string,*>} JSON object
+                             */
+                            PageSpan.prototype.toJSON = function toJSON() {
+                                return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                            };
+    
+                            /**
+                             * Gets the default type url for PageSpan
+                             * @function getTypeUrl
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.PageSpan
+                             * @static
+                             * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                             * @returns {string} The default type url
+                             */
+                            PageSpan.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                                if (typeUrlPrefix === undefined) {
+                                    typeUrlPrefix = "type.googleapis.com";
+                                }
+                                return typeUrlPrefix + "/google.cloud.discoveryengine.v1.Chunk.PageSpan";
+                            };
+    
+                            return PageSpan;
+                        })();
+    
+                        Chunk.ChunkMetadata = (function() {
+    
+                            /**
+                             * Properties of a ChunkMetadata.
+                             * @memberof google.cloud.discoveryengine.v1.Chunk
+                             * @interface IChunkMetadata
+                             * @property {Array.<google.cloud.discoveryengine.v1.IChunk>|null} [previousChunks] ChunkMetadata previousChunks
+                             * @property {Array.<google.cloud.discoveryengine.v1.IChunk>|null} [nextChunks] ChunkMetadata nextChunks
+                             */
+    
+                            /**
+                             * Constructs a new ChunkMetadata.
+                             * @memberof google.cloud.discoveryengine.v1.Chunk
+                             * @classdesc Represents a ChunkMetadata.
+                             * @implements IChunkMetadata
+                             * @constructor
+                             * @param {google.cloud.discoveryengine.v1.Chunk.IChunkMetadata=} [properties] Properties to set
+                             */
+                            function ChunkMetadata(properties) {
+                                this.previousChunks = [];
+                                this.nextChunks = [];
+                                if (properties)
+                                    for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                        if (properties[keys[i]] != null)
+                                            this[keys[i]] = properties[keys[i]];
+                            }
+    
+                            /**
+                             * ChunkMetadata previousChunks.
+                             * @member {Array.<google.cloud.discoveryengine.v1.IChunk>} previousChunks
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.ChunkMetadata
+                             * @instance
+                             */
+                            ChunkMetadata.prototype.previousChunks = $util.emptyArray;
+    
+                            /**
+                             * ChunkMetadata nextChunks.
+                             * @member {Array.<google.cloud.discoveryengine.v1.IChunk>} nextChunks
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.ChunkMetadata
+                             * @instance
+                             */
+                            ChunkMetadata.prototype.nextChunks = $util.emptyArray;
+    
+                            /**
+                             * Creates a new ChunkMetadata instance using the specified properties.
+                             * @function create
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.ChunkMetadata
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.Chunk.IChunkMetadata=} [properties] Properties to set
+                             * @returns {google.cloud.discoveryengine.v1.Chunk.ChunkMetadata} ChunkMetadata instance
+                             */
+                            ChunkMetadata.create = function create(properties) {
+                                return new ChunkMetadata(properties);
+                            };
+    
+                            /**
+                             * Encodes the specified ChunkMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.Chunk.ChunkMetadata.verify|verify} messages.
+                             * @function encode
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.ChunkMetadata
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.Chunk.IChunkMetadata} message ChunkMetadata message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            ChunkMetadata.encode = function encode(message, writer) {
+                                if (!writer)
+                                    writer = $Writer.create();
+                                if (message.previousChunks != null && message.previousChunks.length)
+                                    for (var i = 0; i < message.previousChunks.length; ++i)
+                                        $root.google.cloud.discoveryengine.v1.Chunk.encode(message.previousChunks[i], writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                                if (message.nextChunks != null && message.nextChunks.length)
+                                    for (var i = 0; i < message.nextChunks.length; ++i)
+                                        $root.google.cloud.discoveryengine.v1.Chunk.encode(message.nextChunks[i], writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                                return writer;
+                            };
+    
+                            /**
+                             * Encodes the specified ChunkMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.Chunk.ChunkMetadata.verify|verify} messages.
+                             * @function encodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.ChunkMetadata
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.Chunk.IChunkMetadata} message ChunkMetadata message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            ChunkMetadata.encodeDelimited = function encodeDelimited(message, writer) {
+                                return this.encode(message, writer).ldelim();
+                            };
+    
+                            /**
+                             * Decodes a ChunkMetadata message from the specified reader or buffer.
+                             * @function decode
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.ChunkMetadata
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @param {number} [length] Message length if known beforehand
+                             * @returns {google.cloud.discoveryengine.v1.Chunk.ChunkMetadata} ChunkMetadata
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            ChunkMetadata.decode = function decode(reader, length) {
+                                if (!(reader instanceof $Reader))
+                                    reader = $Reader.create(reader);
+                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.Chunk.ChunkMetadata();
+                                while (reader.pos < end) {
+                                    var tag = reader.uint32();
+                                    switch (tag >>> 3) {
+                                    case 1: {
+                                            if (!(message.previousChunks && message.previousChunks.length))
+                                                message.previousChunks = [];
+                                            message.previousChunks.push($root.google.cloud.discoveryengine.v1.Chunk.decode(reader, reader.uint32()));
+                                            break;
+                                        }
+                                    case 2: {
+                                            if (!(message.nextChunks && message.nextChunks.length))
+                                                message.nextChunks = [];
+                                            message.nextChunks.push($root.google.cloud.discoveryengine.v1.Chunk.decode(reader, reader.uint32()));
+                                            break;
+                                        }
+                                    default:
+                                        reader.skipType(tag & 7);
+                                        break;
+                                    }
+                                }
+                                return message;
+                            };
+    
+                            /**
+                             * Decodes a ChunkMetadata message from the specified reader or buffer, length delimited.
+                             * @function decodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.ChunkMetadata
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @returns {google.cloud.discoveryengine.v1.Chunk.ChunkMetadata} ChunkMetadata
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            ChunkMetadata.decodeDelimited = function decodeDelimited(reader) {
+                                if (!(reader instanceof $Reader))
+                                    reader = new $Reader(reader);
+                                return this.decode(reader, reader.uint32());
+                            };
+    
+                            /**
+                             * Verifies a ChunkMetadata message.
+                             * @function verify
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.ChunkMetadata
+                             * @static
+                             * @param {Object.<string,*>} message Plain object to verify
+                             * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                             */
+                            ChunkMetadata.verify = function verify(message) {
+                                if (typeof message !== "object" || message === null)
+                                    return "object expected";
+                                if (message.previousChunks != null && message.hasOwnProperty("previousChunks")) {
+                                    if (!Array.isArray(message.previousChunks))
+                                        return "previousChunks: array expected";
+                                    for (var i = 0; i < message.previousChunks.length; ++i) {
+                                        var error = $root.google.cloud.discoveryengine.v1.Chunk.verify(message.previousChunks[i]);
+                                        if (error)
+                                            return "previousChunks." + error;
+                                    }
+                                }
+                                if (message.nextChunks != null && message.hasOwnProperty("nextChunks")) {
+                                    if (!Array.isArray(message.nextChunks))
+                                        return "nextChunks: array expected";
+                                    for (var i = 0; i < message.nextChunks.length; ++i) {
+                                        var error = $root.google.cloud.discoveryengine.v1.Chunk.verify(message.nextChunks[i]);
+                                        if (error)
+                                            return "nextChunks." + error;
+                                    }
+                                }
+                                return null;
+                            };
+    
+                            /**
+                             * Creates a ChunkMetadata message from a plain object. Also converts values to their respective internal types.
+                             * @function fromObject
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.ChunkMetadata
+                             * @static
+                             * @param {Object.<string,*>} object Plain object
+                             * @returns {google.cloud.discoveryengine.v1.Chunk.ChunkMetadata} ChunkMetadata
+                             */
+                            ChunkMetadata.fromObject = function fromObject(object) {
+                                if (object instanceof $root.google.cloud.discoveryengine.v1.Chunk.ChunkMetadata)
+                                    return object;
+                                var message = new $root.google.cloud.discoveryengine.v1.Chunk.ChunkMetadata();
+                                if (object.previousChunks) {
+                                    if (!Array.isArray(object.previousChunks))
+                                        throw TypeError(".google.cloud.discoveryengine.v1.Chunk.ChunkMetadata.previousChunks: array expected");
+                                    message.previousChunks = [];
+                                    for (var i = 0; i < object.previousChunks.length; ++i) {
+                                        if (typeof object.previousChunks[i] !== "object")
+                                            throw TypeError(".google.cloud.discoveryengine.v1.Chunk.ChunkMetadata.previousChunks: object expected");
+                                        message.previousChunks[i] = $root.google.cloud.discoveryengine.v1.Chunk.fromObject(object.previousChunks[i]);
+                                    }
+                                }
+                                if (object.nextChunks) {
+                                    if (!Array.isArray(object.nextChunks))
+                                        throw TypeError(".google.cloud.discoveryengine.v1.Chunk.ChunkMetadata.nextChunks: array expected");
+                                    message.nextChunks = [];
+                                    for (var i = 0; i < object.nextChunks.length; ++i) {
+                                        if (typeof object.nextChunks[i] !== "object")
+                                            throw TypeError(".google.cloud.discoveryengine.v1.Chunk.ChunkMetadata.nextChunks: object expected");
+                                        message.nextChunks[i] = $root.google.cloud.discoveryengine.v1.Chunk.fromObject(object.nextChunks[i]);
+                                    }
+                                }
+                                return message;
+                            };
+    
+                            /**
+                             * Creates a plain object from a ChunkMetadata message. Also converts values to other types if specified.
+                             * @function toObject
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.ChunkMetadata
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.Chunk.ChunkMetadata} message ChunkMetadata
+                             * @param {$protobuf.IConversionOptions} [options] Conversion options
+                             * @returns {Object.<string,*>} Plain object
+                             */
+                            ChunkMetadata.toObject = function toObject(message, options) {
+                                if (!options)
+                                    options = {};
+                                var object = {};
+                                if (options.arrays || options.defaults) {
+                                    object.previousChunks = [];
+                                    object.nextChunks = [];
+                                }
+                                if (message.previousChunks && message.previousChunks.length) {
+                                    object.previousChunks = [];
+                                    for (var j = 0; j < message.previousChunks.length; ++j)
+                                        object.previousChunks[j] = $root.google.cloud.discoveryengine.v1.Chunk.toObject(message.previousChunks[j], options);
+                                }
+                                if (message.nextChunks && message.nextChunks.length) {
+                                    object.nextChunks = [];
+                                    for (var j = 0; j < message.nextChunks.length; ++j)
+                                        object.nextChunks[j] = $root.google.cloud.discoveryengine.v1.Chunk.toObject(message.nextChunks[j], options);
+                                }
+                                return object;
+                            };
+    
+                            /**
+                             * Converts this ChunkMetadata to JSON.
+                             * @function toJSON
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.ChunkMetadata
+                             * @instance
+                             * @returns {Object.<string,*>} JSON object
+                             */
+                            ChunkMetadata.prototype.toJSON = function toJSON() {
+                                return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                            };
+    
+                            /**
+                             * Gets the default type url for ChunkMetadata
+                             * @function getTypeUrl
+                             * @memberof google.cloud.discoveryengine.v1.Chunk.ChunkMetadata
+                             * @static
+                             * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                             * @returns {string} The default type url
+                             */
+                            ChunkMetadata.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                                if (typeUrlPrefix === undefined) {
+                                    typeUrlPrefix = "type.googleapis.com";
+                                }
+                                return typeUrlPrefix + "/google.cloud.discoveryengine.v1.Chunk.ChunkMetadata";
+                            };
+    
+                            return ChunkMetadata;
+                        })();
+    
+                        return Chunk;
+                    })();
+    
+                    /**
+                     * IndustryVertical enum.
+                     * @name google.cloud.discoveryengine.v1.IndustryVertical
+                     * @enum {number}
+                     * @property {number} INDUSTRY_VERTICAL_UNSPECIFIED=0 INDUSTRY_VERTICAL_UNSPECIFIED value
+                     * @property {number} GENERIC=1 GENERIC value
+                     * @property {number} MEDIA=2 MEDIA value
+                     * @property {number} HEALTHCARE_FHIR=7 HEALTHCARE_FHIR value
+                     */
+                    v1.IndustryVertical = (function() {
+                        var valuesById = {}, values = Object.create(valuesById);
+                        values[valuesById[0] = "INDUSTRY_VERTICAL_UNSPECIFIED"] = 0;
+                        values[valuesById[1] = "GENERIC"] = 1;
+                        values[valuesById[2] = "MEDIA"] = 2;
+                        values[valuesById[7] = "HEALTHCARE_FHIR"] = 7;
+                        return values;
+                    })();
+    
+                    /**
+                     * SolutionType enum.
+                     * @name google.cloud.discoveryengine.v1.SolutionType
+                     * @enum {number}
+                     * @property {number} SOLUTION_TYPE_UNSPECIFIED=0 SOLUTION_TYPE_UNSPECIFIED value
+                     * @property {number} SOLUTION_TYPE_RECOMMENDATION=1 SOLUTION_TYPE_RECOMMENDATION value
+                     * @property {number} SOLUTION_TYPE_SEARCH=2 SOLUTION_TYPE_SEARCH value
+                     * @property {number} SOLUTION_TYPE_CHAT=3 SOLUTION_TYPE_CHAT value
+                     * @property {number} SOLUTION_TYPE_GENERATIVE_CHAT=4 SOLUTION_TYPE_GENERATIVE_CHAT value
+                     */
+                    v1.SolutionType = (function() {
+                        var valuesById = {}, values = Object.create(valuesById);
+                        values[valuesById[0] = "SOLUTION_TYPE_UNSPECIFIED"] = 0;
+                        values[valuesById[1] = "SOLUTION_TYPE_RECOMMENDATION"] = 1;
+                        values[valuesById[2] = "SOLUTION_TYPE_SEARCH"] = 2;
+                        values[valuesById[3] = "SOLUTION_TYPE_CHAT"] = 3;
+                        values[valuesById[4] = "SOLUTION_TYPE_GENERATIVE_CHAT"] = 4;
+                        return values;
+                    })();
+    
+                    /**
+                     * SearchUseCase enum.
+                     * @name google.cloud.discoveryengine.v1.SearchUseCase
+                     * @enum {number}
+                     * @property {number} SEARCH_USE_CASE_UNSPECIFIED=0 SEARCH_USE_CASE_UNSPECIFIED value
+                     * @property {number} SEARCH_USE_CASE_SEARCH=1 SEARCH_USE_CASE_SEARCH value
+                     * @property {number} SEARCH_USE_CASE_BROWSE=2 SEARCH_USE_CASE_BROWSE value
+                     */
+                    v1.SearchUseCase = (function() {
+                        var valuesById = {}, values = Object.create(valuesById);
+                        values[valuesById[0] = "SEARCH_USE_CASE_UNSPECIFIED"] = 0;
+                        values[valuesById[1] = "SEARCH_USE_CASE_SEARCH"] = 1;
+                        values[valuesById[2] = "SEARCH_USE_CASE_BROWSE"] = 2;
+                        return values;
+                    })();
+    
+                    /**
+                     * SearchTier enum.
+                     * @name google.cloud.discoveryengine.v1.SearchTier
+                     * @enum {number}
+                     * @property {number} SEARCH_TIER_UNSPECIFIED=0 SEARCH_TIER_UNSPECIFIED value
+                     * @property {number} SEARCH_TIER_STANDARD=1 SEARCH_TIER_STANDARD value
+                     * @property {number} SEARCH_TIER_ENTERPRISE=2 SEARCH_TIER_ENTERPRISE value
+                     */
+                    v1.SearchTier = (function() {
+                        var valuesById = {}, values = Object.create(valuesById);
+                        values[valuesById[0] = "SEARCH_TIER_UNSPECIFIED"] = 0;
+                        values[valuesById[1] = "SEARCH_TIER_STANDARD"] = 1;
+                        values[valuesById[2] = "SEARCH_TIER_ENTERPRISE"] = 2;
+                        return values;
+                    })();
+    
+                    /**
+                     * SearchAddOn enum.
+                     * @name google.cloud.discoveryengine.v1.SearchAddOn
+                     * @enum {number}
+                     * @property {number} SEARCH_ADD_ON_UNSPECIFIED=0 SEARCH_ADD_ON_UNSPECIFIED value
+                     * @property {number} SEARCH_ADD_ON_LLM=1 SEARCH_ADD_ON_LLM value
+                     */
+                    v1.SearchAddOn = (function() {
+                        var valuesById = {}, values = Object.create(valuesById);
+                        values[valuesById[0] = "SEARCH_ADD_ON_UNSPECIFIED"] = 0;
+                        values[valuesById[1] = "SEARCH_ADD_ON_LLM"] = 1;
+                        return values;
+                    })();
+    
+                    v1.Interval = (function() {
+    
+                        /**
+                         * Properties of an Interval.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @interface IInterval
+                         * @property {number|null} [minimum] Interval minimum
+                         * @property {number|null} [exclusiveMinimum] Interval exclusiveMinimum
+                         * @property {number|null} [maximum] Interval maximum
+                         * @property {number|null} [exclusiveMaximum] Interval exclusiveMaximum
+                         */
+    
+                        /**
+                         * Constructs a new Interval.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @classdesc Represents an Interval.
+                         * @implements IInterval
+                         * @constructor
+                         * @param {google.cloud.discoveryengine.v1.IInterval=} [properties] Properties to set
+                         */
+                        function Interval(properties) {
+                            if (properties)
+                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                    if (properties[keys[i]] != null)
+                                        this[keys[i]] = properties[keys[i]];
+                        }
+    
+                        /**
+                         * Interval minimum.
+                         * @member {number|null|undefined} minimum
+                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @instance
+                         */
+                        Interval.prototype.minimum = null;
+    
+                        /**
+                         * Interval exclusiveMinimum.
+                         * @member {number|null|undefined} exclusiveMinimum
+                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @instance
+                         */
+                        Interval.prototype.exclusiveMinimum = null;
+    
+                        /**
+                         * Interval maximum.
+                         * @member {number|null|undefined} maximum
+                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @instance
+                         */
+                        Interval.prototype.maximum = null;
+    
+                        /**
+                         * Interval exclusiveMaximum.
+                         * @member {number|null|undefined} exclusiveMaximum
+                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @instance
+                         */
+                        Interval.prototype.exclusiveMaximum = null;
+    
+                        // OneOf field names bound to virtual getters and setters
+                        var $oneOfFields;
+    
+                        /**
+                         * Interval min.
+                         * @member {"minimum"|"exclusiveMinimum"|undefined} min
+                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @instance
+                         */
+                        Object.defineProperty(Interval.prototype, "min", {
+                            get: $util.oneOfGetter($oneOfFields = ["minimum", "exclusiveMinimum"]),
+                            set: $util.oneOfSetter($oneOfFields)
+                        });
+    
+                        /**
+                         * Interval max.
+                         * @member {"maximum"|"exclusiveMaximum"|undefined} max
+                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @instance
+                         */
+                        Object.defineProperty(Interval.prototype, "max", {
+                            get: $util.oneOfGetter($oneOfFields = ["maximum", "exclusiveMaximum"]),
+                            set: $util.oneOfSetter($oneOfFields)
+                        });
+    
+                        /**
+                         * Creates a new Interval instance using the specified properties.
+                         * @function create
+                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.IInterval=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.Interval} Interval instance
+                         */
+                        Interval.create = function create(properties) {
+                            return new Interval(properties);
+                        };
+    
+                        /**
+                         * Encodes the specified Interval message. Does not implicitly {@link google.cloud.discoveryengine.v1.Interval.verify|verify} messages.
+                         * @function encode
+                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.IInterval} message Interval message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        Interval.encode = function encode(message, writer) {
+                            if (!writer)
+                                writer = $Writer.create();
+                            if (message.minimum != null && Object.hasOwnProperty.call(message, "minimum"))
+                                writer.uint32(/* id 1, wireType 1 =*/9).double(message.minimum);
+                            if (message.exclusiveMinimum != null && Object.hasOwnProperty.call(message, "exclusiveMinimum"))
+                                writer.uint32(/* id 2, wireType 1 =*/17).double(message.exclusiveMinimum);
+                            if (message.maximum != null && Object.hasOwnProperty.call(message, "maximum"))
+                                writer.uint32(/* id 3, wireType 1 =*/25).double(message.maximum);
+                            if (message.exclusiveMaximum != null && Object.hasOwnProperty.call(message, "exclusiveMaximum"))
+                                writer.uint32(/* id 4, wireType 1 =*/33).double(message.exclusiveMaximum);
+                            return writer;
+                        };
+    
+                        /**
+                         * Encodes the specified Interval message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.Interval.verify|verify} messages.
+                         * @function encodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.IInterval} message Interval message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        Interval.encodeDelimited = function encodeDelimited(message, writer) {
+                            return this.encode(message, writer).ldelim();
+                        };
+    
+                        /**
+                         * Decodes an Interval message from the specified reader or buffer.
+                         * @function decode
+                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @param {number} [length] Message length if known beforehand
+                         * @returns {google.cloud.discoveryengine.v1.Interval} Interval
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        Interval.decode = function decode(reader, length) {
+                            if (!(reader instanceof $Reader))
+                                reader = $Reader.create(reader);
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.Interval();
+                            while (reader.pos < end) {
+                                var tag = reader.uint32();
+                                switch (tag >>> 3) {
+                                case 1: {
+                                        message.minimum = reader.double();
+                                        break;
+                                    }
+                                case 2: {
+                                        message.exclusiveMinimum = reader.double();
+                                        break;
+                                    }
+                                case 3: {
+                                        message.maximum = reader.double();
+                                        break;
+                                    }
+                                case 4: {
+                                        message.exclusiveMaximum = reader.double();
+                                        break;
+                                    }
+                                default:
+                                    reader.skipType(tag & 7);
+                                    break;
+                                }
+                            }
+                            return message;
+                        };
+    
+                        /**
+                         * Decodes an Interval message from the specified reader or buffer, length delimited.
+                         * @function decodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @returns {google.cloud.discoveryengine.v1.Interval} Interval
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        Interval.decodeDelimited = function decodeDelimited(reader) {
+                            if (!(reader instanceof $Reader))
+                                reader = new $Reader(reader);
+                            return this.decode(reader, reader.uint32());
+                        };
+    
+                        /**
+                         * Verifies an Interval message.
+                         * @function verify
+                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @static
+                         * @param {Object.<string,*>} message Plain object to verify
+                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                         */
+                        Interval.verify = function verify(message) {
+                            if (typeof message !== "object" || message === null)
+                                return "object expected";
+                            var properties = {};
+                            if (message.minimum != null && message.hasOwnProperty("minimum")) {
+                                properties.min = 1;
+                                if (typeof message.minimum !== "number")
+                                    return "minimum: number expected";
+                            }
+                            if (message.exclusiveMinimum != null && message.hasOwnProperty("exclusiveMinimum")) {
+                                if (properties.min === 1)
+                                    return "min: multiple values";
+                                properties.min = 1;
+                                if (typeof message.exclusiveMinimum !== "number")
+                                    return "exclusiveMinimum: number expected";
+                            }
+                            if (message.maximum != null && message.hasOwnProperty("maximum")) {
+                                properties.max = 1;
+                                if (typeof message.maximum !== "number")
+                                    return "maximum: number expected";
+                            }
+                            if (message.exclusiveMaximum != null && message.hasOwnProperty("exclusiveMaximum")) {
+                                if (properties.max === 1)
+                                    return "max: multiple values";
+                                properties.max = 1;
+                                if (typeof message.exclusiveMaximum !== "number")
+                                    return "exclusiveMaximum: number expected";
+                            }
+                            return null;
+                        };
+    
+                        /**
+                         * Creates an Interval message from a plain object. Also converts values to their respective internal types.
+                         * @function fromObject
+                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @static
+                         * @param {Object.<string,*>} object Plain object
+                         * @returns {google.cloud.discoveryengine.v1.Interval} Interval
+                         */
+                        Interval.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.Interval)
+                                return object;
+                            var message = new $root.google.cloud.discoveryengine.v1.Interval();
+                            if (object.minimum != null)
+                                message.minimum = Number(object.minimum);
+                            if (object.exclusiveMinimum != null)
+                                message.exclusiveMinimum = Number(object.exclusiveMinimum);
+                            if (object.maximum != null)
+                                message.maximum = Number(object.maximum);
+                            if (object.exclusiveMaximum != null)
+                                message.exclusiveMaximum = Number(object.exclusiveMaximum);
+                            return message;
+                        };
+    
+                        /**
+                         * Creates a plain object from an Interval message. Also converts values to other types if specified.
+                         * @function toObject
+                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.Interval} message Interval
+                         * @param {$protobuf.IConversionOptions} [options] Conversion options
+                         * @returns {Object.<string,*>} Plain object
+                         */
+                        Interval.toObject = function toObject(message, options) {
+                            if (!options)
+                                options = {};
+                            var object = {};
+                            if (message.minimum != null && message.hasOwnProperty("minimum")) {
+                                object.minimum = options.json && !isFinite(message.minimum) ? String(message.minimum) : message.minimum;
+                                if (options.oneofs)
+                                    object.min = "minimum";
+                            }
+                            if (message.exclusiveMinimum != null && message.hasOwnProperty("exclusiveMinimum")) {
+                                object.exclusiveMinimum = options.json && !isFinite(message.exclusiveMinimum) ? String(message.exclusiveMinimum) : message.exclusiveMinimum;
+                                if (options.oneofs)
+                                    object.min = "exclusiveMinimum";
+                            }
+                            if (message.maximum != null && message.hasOwnProperty("maximum")) {
+                                object.maximum = options.json && !isFinite(message.maximum) ? String(message.maximum) : message.maximum;
+                                if (options.oneofs)
+                                    object.max = "maximum";
+                            }
+                            if (message.exclusiveMaximum != null && message.hasOwnProperty("exclusiveMaximum")) {
+                                object.exclusiveMaximum = options.json && !isFinite(message.exclusiveMaximum) ? String(message.exclusiveMaximum) : message.exclusiveMaximum;
+                                if (options.oneofs)
+                                    object.max = "exclusiveMaximum";
+                            }
+                            return object;
+                        };
+    
+                        /**
+                         * Converts this Interval to JSON.
+                         * @function toJSON
+                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @instance
+                         * @returns {Object.<string,*>} JSON object
+                         */
+                        Interval.prototype.toJSON = function toJSON() {
+                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                        };
+    
+                        /**
+                         * Gets the default type url for Interval
+                         * @function getTypeUrl
+                         * @memberof google.cloud.discoveryengine.v1.Interval
+                         * @static
+                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns {string} The default type url
+                         */
+                        Interval.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                            if (typeUrlPrefix === undefined) {
+                                typeUrlPrefix = "type.googleapis.com";
+                            }
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.Interval";
+                        };
+    
+                        return Interval;
+                    })();
+    
+                    v1.CustomAttribute = (function() {
+    
+                        /**
+                         * Properties of a CustomAttribute.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @interface ICustomAttribute
+                         * @property {Array.<string>|null} [text] CustomAttribute text
+                         * @property {Array.<number>|null} [numbers] CustomAttribute numbers
+                         */
+    
+                        /**
+                         * Constructs a new CustomAttribute.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @classdesc Represents a CustomAttribute.
+                         * @implements ICustomAttribute
+                         * @constructor
+                         * @param {google.cloud.discoveryengine.v1.ICustomAttribute=} [properties] Properties to set
+                         */
+                        function CustomAttribute(properties) {
+                            this.text = [];
+                            this.numbers = [];
+                            if (properties)
+                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                    if (properties[keys[i]] != null)
+                                        this[keys[i]] = properties[keys[i]];
+                        }
+    
+                        /**
+                         * CustomAttribute text.
+                         * @member {Array.<string>} text
+                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
+                         * @instance
+                         */
+                        CustomAttribute.prototype.text = $util.emptyArray;
+    
+                        /**
+                         * CustomAttribute numbers.
+                         * @member {Array.<number>} numbers
+                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
+                         * @instance
+                         */
+                        CustomAttribute.prototype.numbers = $util.emptyArray;
+    
+                        /**
+                         * Creates a new CustomAttribute instance using the specified properties.
+                         * @function create
+                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.ICustomAttribute=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.CustomAttribute} CustomAttribute instance
+                         */
+                        CustomAttribute.create = function create(properties) {
+                            return new CustomAttribute(properties);
+                        };
+    
+                        /**
+                         * Encodes the specified CustomAttribute message. Does not implicitly {@link google.cloud.discoveryengine.v1.CustomAttribute.verify|verify} messages.
+                         * @function encode
+                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.ICustomAttribute} message CustomAttribute message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        CustomAttribute.encode = function encode(message, writer) {
+                            if (!writer)
+                                writer = $Writer.create();
+                            if (message.text != null && message.text.length)
+                                for (var i = 0; i < message.text.length; ++i)
+                                    writer.uint32(/* id 1, wireType 2 =*/10).string(message.text[i]);
+                            if (message.numbers != null && message.numbers.length) {
+                                writer.uint32(/* id 2, wireType 2 =*/18).fork();
+                                for (var i = 0; i < message.numbers.length; ++i)
+                                    writer.double(message.numbers[i]);
+                                writer.ldelim();
+                            }
+                            return writer;
+                        };
+    
+                        /**
+                         * Encodes the specified CustomAttribute message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.CustomAttribute.verify|verify} messages.
+                         * @function encodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.ICustomAttribute} message CustomAttribute message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        CustomAttribute.encodeDelimited = function encodeDelimited(message, writer) {
+                            return this.encode(message, writer).ldelim();
+                        };
+    
+                        /**
+                         * Decodes a CustomAttribute message from the specified reader or buffer.
+                         * @function decode
+                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @param {number} [length] Message length if known beforehand
+                         * @returns {google.cloud.discoveryengine.v1.CustomAttribute} CustomAttribute
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        CustomAttribute.decode = function decode(reader, length) {
+                            if (!(reader instanceof $Reader))
+                                reader = $Reader.create(reader);
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.CustomAttribute();
+                            while (reader.pos < end) {
+                                var tag = reader.uint32();
+                                switch (tag >>> 3) {
+                                case 1: {
+                                        if (!(message.text && message.text.length))
+                                            message.text = [];
+                                        message.text.push(reader.string());
+                                        break;
+                                    }
+                                case 2: {
+                                        if (!(message.numbers && message.numbers.length))
+                                            message.numbers = [];
+                                        if ((tag & 7) === 2) {
+                                            var end2 = reader.uint32() + reader.pos;
+                                            while (reader.pos < end2)
+                                                message.numbers.push(reader.double());
+                                        } else
+                                            message.numbers.push(reader.double());
+                                        break;
+                                    }
+                                default:
+                                    reader.skipType(tag & 7);
+                                    break;
+                                }
+                            }
+                            return message;
+                        };
+    
+                        /**
+                         * Decodes a CustomAttribute message from the specified reader or buffer, length delimited.
+                         * @function decodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @returns {google.cloud.discoveryengine.v1.CustomAttribute} CustomAttribute
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        CustomAttribute.decodeDelimited = function decodeDelimited(reader) {
+                            if (!(reader instanceof $Reader))
+                                reader = new $Reader(reader);
+                            return this.decode(reader, reader.uint32());
+                        };
+    
+                        /**
+                         * Verifies a CustomAttribute message.
+                         * @function verify
+                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
+                         * @static
+                         * @param {Object.<string,*>} message Plain object to verify
+                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                         */
+                        CustomAttribute.verify = function verify(message) {
+                            if (typeof message !== "object" || message === null)
+                                return "object expected";
+                            if (message.text != null && message.hasOwnProperty("text")) {
+                                if (!Array.isArray(message.text))
+                                    return "text: array expected";
+                                for (var i = 0; i < message.text.length; ++i)
+                                    if (!$util.isString(message.text[i]))
+                                        return "text: string[] expected";
+                            }
+                            if (message.numbers != null && message.hasOwnProperty("numbers")) {
+                                if (!Array.isArray(message.numbers))
+                                    return "numbers: array expected";
+                                for (var i = 0; i < message.numbers.length; ++i)
+                                    if (typeof message.numbers[i] !== "number")
+                                        return "numbers: number[] expected";
+                            }
+                            return null;
+                        };
+    
+                        /**
+                         * Creates a CustomAttribute message from a plain object. Also converts values to their respective internal types.
+                         * @function fromObject
+                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
+                         * @static
+                         * @param {Object.<string,*>} object Plain object
+                         * @returns {google.cloud.discoveryengine.v1.CustomAttribute} CustomAttribute
+                         */
+                        CustomAttribute.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.CustomAttribute)
+                                return object;
+                            var message = new $root.google.cloud.discoveryengine.v1.CustomAttribute();
+                            if (object.text) {
+                                if (!Array.isArray(object.text))
+                                    throw TypeError(".google.cloud.discoveryengine.v1.CustomAttribute.text: array expected");
+                                message.text = [];
+                                for (var i = 0; i < object.text.length; ++i)
+                                    message.text[i] = String(object.text[i]);
+                            }
+                            if (object.numbers) {
+                                if (!Array.isArray(object.numbers))
+                                    throw TypeError(".google.cloud.discoveryengine.v1.CustomAttribute.numbers: array expected");
+                                message.numbers = [];
+                                for (var i = 0; i < object.numbers.length; ++i)
+                                    message.numbers[i] = Number(object.numbers[i]);
+                            }
+                            return message;
+                        };
+    
+                        /**
+                         * Creates a plain object from a CustomAttribute message. Also converts values to other types if specified.
+                         * @function toObject
+                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.CustomAttribute} message CustomAttribute
+                         * @param {$protobuf.IConversionOptions} [options] Conversion options
+                         * @returns {Object.<string,*>} Plain object
+                         */
+                        CustomAttribute.toObject = function toObject(message, options) {
+                            if (!options)
+                                options = {};
+                            var object = {};
+                            if (options.arrays || options.defaults) {
+                                object.text = [];
+                                object.numbers = [];
+                            }
+                            if (message.text && message.text.length) {
+                                object.text = [];
+                                for (var j = 0; j < message.text.length; ++j)
+                                    object.text[j] = message.text[j];
+                            }
+                            if (message.numbers && message.numbers.length) {
+                                object.numbers = [];
+                                for (var j = 0; j < message.numbers.length; ++j)
+                                    object.numbers[j] = options.json && !isFinite(message.numbers[j]) ? String(message.numbers[j]) : message.numbers[j];
+                            }
+                            return object;
+                        };
+    
+                        /**
+                         * Converts this CustomAttribute to JSON.
+                         * @function toJSON
+                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
+                         * @instance
+                         * @returns {Object.<string,*>} JSON object
+                         */
+                        CustomAttribute.prototype.toJSON = function toJSON() {
+                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                        };
+    
+                        /**
+                         * Gets the default type url for CustomAttribute
+                         * @function getTypeUrl
+                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
+                         * @static
+                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns {string} The default type url
+                         */
+                        CustomAttribute.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                            if (typeUrlPrefix === undefined) {
+                                typeUrlPrefix = "type.googleapis.com";
+                            }
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.CustomAttribute";
+                        };
+    
+                        return CustomAttribute;
+                    })();
+    
+                    v1.UserInfo = (function() {
+    
+                        /**
+                         * Properties of a UserInfo.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @interface IUserInfo
+                         * @property {string|null} [userId] UserInfo userId
+                         * @property {string|null} [userAgent] UserInfo userAgent
+                         */
+    
+                        /**
+                         * Constructs a new UserInfo.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @classdesc Represents a UserInfo.
+                         * @implements IUserInfo
+                         * @constructor
+                         * @param {google.cloud.discoveryengine.v1.IUserInfo=} [properties] Properties to set
+                         */
+                        function UserInfo(properties) {
+                            if (properties)
+                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                    if (properties[keys[i]] != null)
+                                        this[keys[i]] = properties[keys[i]];
+                        }
+    
+                        /**
+                         * UserInfo userId.
+                         * @member {string} userId
+                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * @instance
+                         */
+                        UserInfo.prototype.userId = "";
+    
+                        /**
+                         * UserInfo userAgent.
+                         * @member {string} userAgent
+                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * @instance
+                         */
+                        UserInfo.prototype.userAgent = "";
+    
+                        /**
+                         * Creates a new UserInfo instance using the specified properties.
+                         * @function create
+                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.IUserInfo=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.UserInfo} UserInfo instance
+                         */
+                        UserInfo.create = function create(properties) {
+                            return new UserInfo(properties);
+                        };
+    
+                        /**
+                         * Encodes the specified UserInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.UserInfo.verify|verify} messages.
+                         * @function encode
+                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.IUserInfo} message UserInfo message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        UserInfo.encode = function encode(message, writer) {
+                            if (!writer)
+                                writer = $Writer.create();
+                            if (message.userId != null && Object.hasOwnProperty.call(message, "userId"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.userId);
+                            if (message.userAgent != null && Object.hasOwnProperty.call(message, "userAgent"))
+                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.userAgent);
+                            return writer;
+                        };
+    
+                        /**
+                         * Encodes the specified UserInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.UserInfo.verify|verify} messages.
+                         * @function encodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.IUserInfo} message UserInfo message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        UserInfo.encodeDelimited = function encodeDelimited(message, writer) {
+                            return this.encode(message, writer).ldelim();
+                        };
+    
+                        /**
+                         * Decodes a UserInfo message from the specified reader or buffer.
+                         * @function decode
+                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @param {number} [length] Message length if known beforehand
+                         * @returns {google.cloud.discoveryengine.v1.UserInfo} UserInfo
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        UserInfo.decode = function decode(reader, length) {
+                            if (!(reader instanceof $Reader))
+                                reader = $Reader.create(reader);
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.UserInfo();
+                            while (reader.pos < end) {
+                                var tag = reader.uint32();
+                                switch (tag >>> 3) {
+                                case 1: {
+                                        message.userId = reader.string();
+                                        break;
+                                    }
+                                case 2: {
+                                        message.userAgent = reader.string();
+                                        break;
+                                    }
+                                default:
+                                    reader.skipType(tag & 7);
+                                    break;
+                                }
+                            }
+                            return message;
+                        };
+    
+                        /**
+                         * Decodes a UserInfo message from the specified reader or buffer, length delimited.
+                         * @function decodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @returns {google.cloud.discoveryengine.v1.UserInfo} UserInfo
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        UserInfo.decodeDelimited = function decodeDelimited(reader) {
+                            if (!(reader instanceof $Reader))
+                                reader = new $Reader(reader);
+                            return this.decode(reader, reader.uint32());
+                        };
+    
+                        /**
+                         * Verifies a UserInfo message.
+                         * @function verify
+                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * @static
+                         * @param {Object.<string,*>} message Plain object to verify
+                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                         */
+                        UserInfo.verify = function verify(message) {
+                            if (typeof message !== "object" || message === null)
+                                return "object expected";
+                            if (message.userId != null && message.hasOwnProperty("userId"))
+                                if (!$util.isString(message.userId))
+                                    return "userId: string expected";
+                            if (message.userAgent != null && message.hasOwnProperty("userAgent"))
+                                if (!$util.isString(message.userAgent))
+                                    return "userAgent: string expected";
+                            return null;
+                        };
+    
+                        /**
+                         * Creates a UserInfo message from a plain object. Also converts values to their respective internal types.
+                         * @function fromObject
+                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * @static
+                         * @param {Object.<string,*>} object Plain object
+                         * @returns {google.cloud.discoveryengine.v1.UserInfo} UserInfo
+                         */
+                        UserInfo.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.UserInfo)
+                                return object;
+                            var message = new $root.google.cloud.discoveryengine.v1.UserInfo();
+                            if (object.userId != null)
+                                message.userId = String(object.userId);
+                            if (object.userAgent != null)
+                                message.userAgent = String(object.userAgent);
+                            return message;
+                        };
+    
+                        /**
+                         * Creates a plain object from a UserInfo message. Also converts values to other types if specified.
+                         * @function toObject
+                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.UserInfo} message UserInfo
+                         * @param {$protobuf.IConversionOptions} [options] Conversion options
+                         * @returns {Object.<string,*>} Plain object
+                         */
+                        UserInfo.toObject = function toObject(message, options) {
+                            if (!options)
+                                options = {};
+                            var object = {};
+                            if (options.defaults) {
+                                object.userId = "";
+                                object.userAgent = "";
+                            }
+                            if (message.userId != null && message.hasOwnProperty("userId"))
+                                object.userId = message.userId;
+                            if (message.userAgent != null && message.hasOwnProperty("userAgent"))
+                                object.userAgent = message.userAgent;
+                            return object;
+                        };
+    
+                        /**
+                         * Converts this UserInfo to JSON.
+                         * @function toJSON
+                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * @instance
+                         * @returns {Object.<string,*>} JSON object
+                         */
+                        UserInfo.prototype.toJSON = function toJSON() {
+                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                        };
+    
+                        /**
+                         * Gets the default type url for UserInfo
+                         * @function getTypeUrl
+                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * @static
+                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns {string} The default type url
+                         */
+                        UserInfo.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                            if (typeUrlPrefix === undefined) {
+                                typeUrlPrefix = "type.googleapis.com";
+                            }
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.UserInfo";
+                        };
+    
+                        return UserInfo;
+                    })();
+    
+                    v1.SuggestionDenyListEntry = (function() {
+    
+                        /**
+                         * Properties of a SuggestionDenyListEntry.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @interface ISuggestionDenyListEntry
+                         * @property {string|null} [blockPhrase] SuggestionDenyListEntry blockPhrase
+                         * @property {google.cloud.discoveryengine.v1.SuggestionDenyListEntry.MatchOperator|null} [matchOperator] SuggestionDenyListEntry matchOperator
+                         */
+    
+                        /**
+                         * Constructs a new SuggestionDenyListEntry.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @classdesc Represents a SuggestionDenyListEntry.
+                         * @implements ISuggestionDenyListEntry
+                         * @constructor
+                         * @param {google.cloud.discoveryengine.v1.ISuggestionDenyListEntry=} [properties] Properties to set
+                         */
+                        function SuggestionDenyListEntry(properties) {
+                            if (properties)
+                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                    if (properties[keys[i]] != null)
+                                        this[keys[i]] = properties[keys[i]];
+                        }
+    
+                        /**
+                         * SuggestionDenyListEntry blockPhrase.
+                         * @member {string} blockPhrase
+                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * @instance
+                         */
+                        SuggestionDenyListEntry.prototype.blockPhrase = "";
+    
+                        /**
+                         * SuggestionDenyListEntry matchOperator.
+                         * @member {google.cloud.discoveryengine.v1.SuggestionDenyListEntry.MatchOperator} matchOperator
+                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * @instance
+                         */
+                        SuggestionDenyListEntry.prototype.matchOperator = 0;
+    
+                        /**
+                         * Creates a new SuggestionDenyListEntry instance using the specified properties.
+                         * @function create
+                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.ISuggestionDenyListEntry=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.SuggestionDenyListEntry} SuggestionDenyListEntry instance
+                         */
+                        SuggestionDenyListEntry.create = function create(properties) {
+                            return new SuggestionDenyListEntry(properties);
+                        };
+    
+                        /**
+                         * Encodes the specified SuggestionDenyListEntry message. Does not implicitly {@link google.cloud.discoveryengine.v1.SuggestionDenyListEntry.verify|verify} messages.
+                         * @function encode
+                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.ISuggestionDenyListEntry} message SuggestionDenyListEntry message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        SuggestionDenyListEntry.encode = function encode(message, writer) {
+                            if (!writer)
+                                writer = $Writer.create();
+                            if (message.blockPhrase != null && Object.hasOwnProperty.call(message, "blockPhrase"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.blockPhrase);
+                            if (message.matchOperator != null && Object.hasOwnProperty.call(message, "matchOperator"))
+                                writer.uint32(/* id 2, wireType 0 =*/16).int32(message.matchOperator);
+                            return writer;
+                        };
+    
+                        /**
+                         * Encodes the specified SuggestionDenyListEntry message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.SuggestionDenyListEntry.verify|verify} messages.
+                         * @function encodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.ISuggestionDenyListEntry} message SuggestionDenyListEntry message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        SuggestionDenyListEntry.encodeDelimited = function encodeDelimited(message, writer) {
+                            return this.encode(message, writer).ldelim();
+                        };
+    
+                        /**
+                         * Decodes a SuggestionDenyListEntry message from the specified reader or buffer.
+                         * @function decode
+                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @param {number} [length] Message length if known beforehand
+                         * @returns {google.cloud.discoveryengine.v1.SuggestionDenyListEntry} SuggestionDenyListEntry
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        SuggestionDenyListEntry.decode = function decode(reader, length) {
+                            if (!(reader instanceof $Reader))
+                                reader = $Reader.create(reader);
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.SuggestionDenyListEntry();
+                            while (reader.pos < end) {
+                                var tag = reader.uint32();
+                                switch (tag >>> 3) {
+                                case 1: {
+                                        message.blockPhrase = reader.string();
+                                        break;
+                                    }
+                                case 2: {
+                                        message.matchOperator = reader.int32();
+                                        break;
+                                    }
+                                default:
+                                    reader.skipType(tag & 7);
+                                    break;
+                                }
+                            }
+                            return message;
+                        };
+    
+                        /**
+                         * Decodes a SuggestionDenyListEntry message from the specified reader or buffer, length delimited.
+                         * @function decodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @returns {google.cloud.discoveryengine.v1.SuggestionDenyListEntry} SuggestionDenyListEntry
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        SuggestionDenyListEntry.decodeDelimited = function decodeDelimited(reader) {
+                            if (!(reader instanceof $Reader))
+                                reader = new $Reader(reader);
+                            return this.decode(reader, reader.uint32());
+                        };
+    
+                        /**
+                         * Verifies a SuggestionDenyListEntry message.
+                         * @function verify
+                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * @static
+                         * @param {Object.<string,*>} message Plain object to verify
+                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                         */
+                        SuggestionDenyListEntry.verify = function verify(message) {
+                            if (typeof message !== "object" || message === null)
+                                return "object expected";
+                            if (message.blockPhrase != null && message.hasOwnProperty("blockPhrase"))
+                                if (!$util.isString(message.blockPhrase))
+                                    return "blockPhrase: string expected";
+                            if (message.matchOperator != null && message.hasOwnProperty("matchOperator"))
+                                switch (message.matchOperator) {
+                                default:
+                                    return "matchOperator: enum value expected";
+                                case 0:
+                                case 1:
+                                case 2:
+                                    break;
+                                }
+                            return null;
+                        };
+    
+                        /**
+                         * Creates a SuggestionDenyListEntry message from a plain object. Also converts values to their respective internal types.
+                         * @function fromObject
+                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * @static
+                         * @param {Object.<string,*>} object Plain object
+                         * @returns {google.cloud.discoveryengine.v1.SuggestionDenyListEntry} SuggestionDenyListEntry
+                         */
+                        SuggestionDenyListEntry.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.SuggestionDenyListEntry)
+                                return object;
+                            var message = new $root.google.cloud.discoveryengine.v1.SuggestionDenyListEntry();
+                            if (object.blockPhrase != null)
+                                message.blockPhrase = String(object.blockPhrase);
+                            switch (object.matchOperator) {
+                            default:
+                                if (typeof object.matchOperator === "number") {
+                                    message.matchOperator = object.matchOperator;
+                                    break;
+                                }
+                                break;
+                            case "MATCH_OPERATOR_UNSPECIFIED":
+                            case 0:
+                                message.matchOperator = 0;
+                                break;
+                            case "EXACT_MATCH":
+                            case 1:
+                                message.matchOperator = 1;
+                                break;
+                            case "CONTAINS":
+                            case 2:
+                                message.matchOperator = 2;
+                                break;
+                            }
+                            return message;
+                        };
+    
+                        /**
+                         * Creates a plain object from a SuggestionDenyListEntry message. Also converts values to other types if specified.
+                         * @function toObject
+                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.SuggestionDenyListEntry} message SuggestionDenyListEntry
+                         * @param {$protobuf.IConversionOptions} [options] Conversion options
+                         * @returns {Object.<string,*>} Plain object
+                         */
+                        SuggestionDenyListEntry.toObject = function toObject(message, options) {
+                            if (!options)
+                                options = {};
+                            var object = {};
+                            if (options.defaults) {
+                                object.blockPhrase = "";
+                                object.matchOperator = options.enums === String ? "MATCH_OPERATOR_UNSPECIFIED" : 0;
+                            }
+                            if (message.blockPhrase != null && message.hasOwnProperty("blockPhrase"))
+                                object.blockPhrase = message.blockPhrase;
+                            if (message.matchOperator != null && message.hasOwnProperty("matchOperator"))
+                                object.matchOperator = options.enums === String ? $root.google.cloud.discoveryengine.v1.SuggestionDenyListEntry.MatchOperator[message.matchOperator] === undefined ? message.matchOperator : $root.google.cloud.discoveryengine.v1.SuggestionDenyListEntry.MatchOperator[message.matchOperator] : message.matchOperator;
+                            return object;
+                        };
+    
+                        /**
+                         * Converts this SuggestionDenyListEntry to JSON.
+                         * @function toJSON
+                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * @instance
+                         * @returns {Object.<string,*>} JSON object
+                         */
+                        SuggestionDenyListEntry.prototype.toJSON = function toJSON() {
+                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                        };
+    
+                        /**
+                         * Gets the default type url for SuggestionDenyListEntry
+                         * @function getTypeUrl
+                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * @static
+                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns {string} The default type url
+                         */
+                        SuggestionDenyListEntry.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                            if (typeUrlPrefix === undefined) {
+                                typeUrlPrefix = "type.googleapis.com";
+                            }
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.SuggestionDenyListEntry";
+                        };
+    
+                        /**
+                         * MatchOperator enum.
+                         * @name google.cloud.discoveryengine.v1.SuggestionDenyListEntry.MatchOperator
+                         * @enum {number}
+                         * @property {number} MATCH_OPERATOR_UNSPECIFIED=0 MATCH_OPERATOR_UNSPECIFIED value
+                         * @property {number} EXACT_MATCH=1 EXACT_MATCH value
+                         * @property {number} CONTAINS=2 CONTAINS value
+                         */
+                        SuggestionDenyListEntry.MatchOperator = (function() {
+                            var valuesById = {}, values = Object.create(valuesById);
+                            values[valuesById[0] = "MATCH_OPERATOR_UNSPECIFIED"] = 0;
+                            values[valuesById[1] = "EXACT_MATCH"] = 1;
+                            values[valuesById[2] = "CONTAINS"] = 2;
+                            return values;
+                        })();
+    
+                        return SuggestionDenyListEntry;
+                    })();
+    
+                    v1.CompletionSuggestion = (function() {
+    
+                        /**
+                         * Properties of a CompletionSuggestion.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @interface ICompletionSuggestion
+                         * @property {number|null} [globalScore] CompletionSuggestion globalScore
+                         * @property {number|Long|null} [frequency] CompletionSuggestion frequency
+                         * @property {string|null} [suggestion] CompletionSuggestion suggestion
+                         * @property {string|null} [languageCode] CompletionSuggestion languageCode
+                         * @property {string|null} [groupId] CompletionSuggestion groupId
+                         * @property {number|null} [groupScore] CompletionSuggestion groupScore
+                         * @property {Array.<string>|null} [alternativePhrases] CompletionSuggestion alternativePhrases
+                         */
+    
+                        /**
+                         * Constructs a new CompletionSuggestion.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @classdesc Represents a CompletionSuggestion.
+                         * @implements ICompletionSuggestion
+                         * @constructor
+                         * @param {google.cloud.discoveryengine.v1.ICompletionSuggestion=} [properties] Properties to set
+                         */
+                        function CompletionSuggestion(properties) {
+                            this.alternativePhrases = [];
+                            if (properties)
+                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                    if (properties[keys[i]] != null)
+                                        this[keys[i]] = properties[keys[i]];
+                        }
+    
+                        /**
+                         * CompletionSuggestion globalScore.
+                         * @member {number|null|undefined} globalScore
+                         * @memberof google.cloud.discoveryengine.v1.CompletionSuggestion
+                         * @instance
+                         */
+                        CompletionSuggestion.prototype.globalScore = null;
+    
+                        /**
+                         * CompletionSuggestion frequency.
+                         * @member {number|Long|null|undefined} frequency
+                         * @memberof google.cloud.discoveryengine.v1.CompletionSuggestion
+                         * @instance
+                         */
+                        CompletionSuggestion.prototype.frequency = null;
+    
+                        /**
+                         * CompletionSuggestion suggestion.
+                         * @member {string} suggestion
+                         * @memberof google.cloud.discoveryengine.v1.CompletionSuggestion
+                         * @instance
+                         */
+                        CompletionSuggestion.prototype.suggestion = "";
+    
+                        /**
+                         * CompletionSuggestion languageCode.
+                         * @member {string} languageCode
+                         * @memberof google.cloud.discoveryengine.v1.CompletionSuggestion
+                         * @instance
+                         */
+                        CompletionSuggestion.prototype.languageCode = "";
+    
+                        /**
+                         * CompletionSuggestion groupId.
+                         * @member {string} groupId
+                         * @memberof google.cloud.discoveryengine.v1.CompletionSuggestion
+                         * @instance
+                         */
+                        CompletionSuggestion.prototype.groupId = "";
+    
+                        /**
+                         * CompletionSuggestion groupScore.
+                         * @member {number} groupScore
+                         * @memberof google.cloud.discoveryengine.v1.CompletionSuggestion
+                         * @instance
+                         */
+                        CompletionSuggestion.prototype.groupScore = 0;
+    
+                        /**
+                         * CompletionSuggestion alternativePhrases.
+                         * @member {Array.<string>} alternativePhrases
+                         * @memberof google.cloud.discoveryengine.v1.CompletionSuggestion
+                         * @instance
+                         */
+                        CompletionSuggestion.prototype.alternativePhrases = $util.emptyArray;
+    
+                        // OneOf field names bound to virtual getters and setters
+                        var $oneOfFields;
+    
+                        /**
+                         * CompletionSuggestion rankingInfo.
+                         * @member {"globalScore"|"frequency"|undefined} rankingInfo
+                         * @memberof google.cloud.discoveryengine.v1.CompletionSuggestion
+                         * @instance
+                         */
+                        Object.defineProperty(CompletionSuggestion.prototype, "rankingInfo", {
+                            get: $util.oneOfGetter($oneOfFields = ["globalScore", "frequency"]),
+                            set: $util.oneOfSetter($oneOfFields)
+                        });
+    
+                        /**
+                         * Creates a new CompletionSuggestion instance using the specified properties.
+                         * @function create
+                         * @memberof google.cloud.discoveryengine.v1.CompletionSuggestion
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.ICompletionSuggestion=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.CompletionSuggestion} CompletionSuggestion instance
+                         */
+                        CompletionSuggestion.create = function create(properties) {
+                            return new CompletionSuggestion(properties);
+                        };
+    
+                        /**
+                         * Encodes the specified CompletionSuggestion message. Does not implicitly {@link google.cloud.discoveryengine.v1.CompletionSuggestion.verify|verify} messages.
+                         * @function encode
+                         * @memberof google.cloud.discoveryengine.v1.CompletionSuggestion
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.ICompletionSuggestion} message CompletionSuggestion message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        CompletionSuggestion.encode = function encode(message, writer) {
+                            if (!writer)
+                                writer = $Writer.create();
+                            if (message.suggestion != null && Object.hasOwnProperty.call(message, "suggestion"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.suggestion);
+                            if (message.globalScore != null && Object.hasOwnProperty.call(message, "globalScore"))
+                                writer.uint32(/* id 2, wireType 1 =*/17).double(message.globalScore);
+                            if (message.frequency != null && Object.hasOwnProperty.call(message, "frequency"))
+                                writer.uint32(/* id 3, wireType 0 =*/24).int64(message.frequency);
+                            if (message.languageCode != null && Object.hasOwnProperty.call(message, "languageCode"))
+                                writer.uint32(/* id 4, wireType 2 =*/34).string(message.languageCode);
+                            if (message.groupId != null && Object.hasOwnProperty.call(message, "groupId"))
+                                writer.uint32(/* id 5, wireType 2 =*/42).string(message.groupId);
+                            if (message.groupScore != null && Object.hasOwnProperty.call(message, "groupScore"))
+                                writer.uint32(/* id 6, wireType 1 =*/49).double(message.groupScore);
+                            if (message.alternativePhrases != null && message.alternativePhrases.length)
+                                for (var i = 0; i < message.alternativePhrases.length; ++i)
+                                    writer.uint32(/* id 7, wireType 2 =*/58).string(message.alternativePhrases[i]);
+                            return writer;
+                        };
+    
+                        /**
+                         * Encodes the specified CompletionSuggestion message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.CompletionSuggestion.verify|verify} messages.
+                         * @function encodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.CompletionSuggestion
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.ICompletionSuggestion} message CompletionSuggestion message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        CompletionSuggestion.encodeDelimited = function encodeDelimited(message, writer) {
+                            return this.encode(message, writer).ldelim();
+                        };
+    
+                        /**
+                         * Decodes a CompletionSuggestion message from the specified reader or buffer.
+                         * @function decode
+                         * @memberof google.cloud.discoveryengine.v1.CompletionSuggestion
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @param {number} [length] Message length if known beforehand
+                         * @returns {google.cloud.discoveryengine.v1.CompletionSuggestion} CompletionSuggestion
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        CompletionSuggestion.decode = function decode(reader, length) {
+                            if (!(reader instanceof $Reader))
+                                reader = $Reader.create(reader);
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.CompletionSuggestion();
+                            while (reader.pos < end) {
+                                var tag = reader.uint32();
+                                switch (tag >>> 3) {
+                                case 2: {
+                                        message.globalScore = reader.double();
+                                        break;
+                                    }
+                                case 3: {
+                                        message.frequency = reader.int64();
+                                        break;
+                                    }
+                                case 1: {
+                                        message.suggestion = reader.string();
+                                        break;
+                                    }
+                                case 4: {
+                                        message.languageCode = reader.string();
+                                        break;
+                                    }
+                                case 5: {
+                                        message.groupId = reader.string();
+                                        break;
+                                    }
+                                case 6: {
+                                        message.groupScore = reader.double();
+                                        break;
+                                    }
+                                case 7: {
+                                        if (!(message.alternativePhrases && message.alternativePhrases.length))
+                                            message.alternativePhrases = [];
+                                        message.alternativePhrases.push(reader.string());
+                                        break;
+                                    }
+                                default:
+                                    reader.skipType(tag & 7);
+                                    break;
+                                }
+                            }
+                            return message;
+                        };
+    
+                        /**
+                         * Decodes a CompletionSuggestion message from the specified reader or buffer, length delimited.
+                         * @function decodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.CompletionSuggestion
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @returns {google.cloud.discoveryengine.v1.CompletionSuggestion} CompletionSuggestion
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        CompletionSuggestion.decodeDelimited = function decodeDelimited(reader) {
+                            if (!(reader instanceof $Reader))
+                                reader = new $Reader(reader);
+                            return this.decode(reader, reader.uint32());
+                        };
+    
+                        /**
+                         * Verifies a CompletionSuggestion message.
+                         * @function verify
+                         * @memberof google.cloud.discoveryengine.v1.CompletionSuggestion
+                         * @static
+                         * @param {Object.<string,*>} message Plain object to verify
+                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                         */
+                        CompletionSuggestion.verify = function verify(message) {
+                            if (typeof message !== "object" || message === null)
+                                return "object expected";
+                            var properties = {};
+                            if (message.globalScore != null && message.hasOwnProperty("globalScore")) {
+                                properties.rankingInfo = 1;
+                                if (typeof message.globalScore !== "number")
+                                    return "globalScore: number expected";
+                            }
+                            if (message.frequency != null && message.hasOwnProperty("frequency")) {
+                                if (properties.rankingInfo === 1)
+                                    return "rankingInfo: multiple values";
+                                properties.rankingInfo = 1;
+                                if (!$util.isInteger(message.frequency) && !(message.frequency && $util.isInteger(message.frequency.low) && $util.isInteger(message.frequency.high)))
+                                    return "frequency: integer|Long expected";
+                            }
+                            if (message.suggestion != null && message.hasOwnProperty("suggestion"))
+                                if (!$util.isString(message.suggestion))
+                                    return "suggestion: string expected";
+                            if (message.languageCode != null && message.hasOwnProperty("languageCode"))
+                                if (!$util.isString(message.languageCode))
+                                    return "languageCode: string expected";
+                            if (message.groupId != null && message.hasOwnProperty("groupId"))
+                                if (!$util.isString(message.groupId))
+                                    return "groupId: string expected";
+                            if (message.groupScore != null && message.hasOwnProperty("groupScore"))
+                                if (typeof message.groupScore !== "number")
+                                    return "groupScore: number expected";
+                            if (message.alternativePhrases != null && message.hasOwnProperty("alternativePhrases")) {
+                                if (!Array.isArray(message.alternativePhrases))
+                                    return "alternativePhrases: array expected";
+                                for (var i = 0; i < message.alternativePhrases.length; ++i)
+                                    if (!$util.isString(message.alternativePhrases[i]))
+                                        return "alternativePhrases: string[] expected";
+                            }
+                            return null;
+                        };
+    
+                        /**
+                         * Creates a CompletionSuggestion message from a plain object. Also converts values to their respective internal types.
+                         * @function fromObject
+                         * @memberof google.cloud.discoveryengine.v1.CompletionSuggestion
+                         * @static
+                         * @param {Object.<string,*>} object Plain object
+                         * @returns {google.cloud.discoveryengine.v1.CompletionSuggestion} CompletionSuggestion
+                         */
+                        CompletionSuggestion.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.CompletionSuggestion)
+                                return object;
+                            var message = new $root.google.cloud.discoveryengine.v1.CompletionSuggestion();
+                            if (object.globalScore != null)
+                                message.globalScore = Number(object.globalScore);
+                            if (object.frequency != null)
+                                if ($util.Long)
+                                    (message.frequency = $util.Long.fromValue(object.frequency)).unsigned = false;
+                                else if (typeof object.frequency === "string")
+                                    message.frequency = parseInt(object.frequency, 10);
+                                else if (typeof object.frequency === "number")
+                                    message.frequency = object.frequency;
+                                else if (typeof object.frequency === "object")
+                                    message.frequency = new $util.LongBits(object.frequency.low >>> 0, object.frequency.high >>> 0).toNumber();
+                            if (object.suggestion != null)
+                                message.suggestion = String(object.suggestion);
+                            if (object.languageCode != null)
+                                message.languageCode = String(object.languageCode);
+                            if (object.groupId != null)
+                                message.groupId = String(object.groupId);
+                            if (object.groupScore != null)
+                                message.groupScore = Number(object.groupScore);
+                            if (object.alternativePhrases) {
+                                if (!Array.isArray(object.alternativePhrases))
+                                    throw TypeError(".google.cloud.discoveryengine.v1.CompletionSuggestion.alternativePhrases: array expected");
+                                message.alternativePhrases = [];
+                                for (var i = 0; i < object.alternativePhrases.length; ++i)
+                                    message.alternativePhrases[i] = String(object.alternativePhrases[i]);
+                            }
+                            return message;
+                        };
+    
+                        /**
+                         * Creates a plain object from a CompletionSuggestion message. Also converts values to other types if specified.
+                         * @function toObject
+                         * @memberof google.cloud.discoveryengine.v1.CompletionSuggestion
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.CompletionSuggestion} message CompletionSuggestion
+                         * @param {$protobuf.IConversionOptions} [options] Conversion options
+                         * @returns {Object.<string,*>} Plain object
+                         */
+                        CompletionSuggestion.toObject = function toObject(message, options) {
+                            if (!options)
+                                options = {};
+                            var object = {};
+                            if (options.arrays || options.defaults)
+                                object.alternativePhrases = [];
+                            if (options.defaults) {
+                                object.suggestion = "";
+                                object.languageCode = "";
+                                object.groupId = "";
+                                object.groupScore = 0;
+                            }
+                            if (message.suggestion != null && message.hasOwnProperty("suggestion"))
+                                object.suggestion = message.suggestion;
+                            if (message.globalScore != null && message.hasOwnProperty("globalScore")) {
+                                object.globalScore = options.json && !isFinite(message.globalScore) ? String(message.globalScore) : message.globalScore;
+                                if (options.oneofs)
+                                    object.rankingInfo = "globalScore";
+                            }
+                            if (message.frequency != null && message.hasOwnProperty("frequency")) {
+                                if (typeof message.frequency === "number")
+                                    object.frequency = options.longs === String ? String(message.frequency) : message.frequency;
+                                else
+                                    object.frequency = options.longs === String ? $util.Long.prototype.toString.call(message.frequency) : options.longs === Number ? new $util.LongBits(message.frequency.low >>> 0, message.frequency.high >>> 0).toNumber() : message.frequency;
+                                if (options.oneofs)
+                                    object.rankingInfo = "frequency";
+                            }
+                            if (message.languageCode != null && message.hasOwnProperty("languageCode"))
+                                object.languageCode = message.languageCode;
+                            if (message.groupId != null && message.hasOwnProperty("groupId"))
+                                object.groupId = message.groupId;
+                            if (message.groupScore != null && message.hasOwnProperty("groupScore"))
+                                object.groupScore = options.json && !isFinite(message.groupScore) ? String(message.groupScore) : message.groupScore;
+                            if (message.alternativePhrases && message.alternativePhrases.length) {
+                                object.alternativePhrases = [];
+                                for (var j = 0; j < message.alternativePhrases.length; ++j)
+                                    object.alternativePhrases[j] = message.alternativePhrases[j];
+                            }
+                            return object;
+                        };
+    
+                        /**
+                         * Converts this CompletionSuggestion to JSON.
+                         * @function toJSON
+                         * @memberof google.cloud.discoveryengine.v1.CompletionSuggestion
+                         * @instance
+                         * @returns {Object.<string,*>} JSON object
+                         */
+                        CompletionSuggestion.prototype.toJSON = function toJSON() {
+                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                        };
+    
+                        /**
+                         * Gets the default type url for CompletionSuggestion
+                         * @function getTypeUrl
+                         * @memberof google.cloud.discoveryengine.v1.CompletionSuggestion
+                         * @static
+                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns {string} The default type url
+                         */
+                        CompletionSuggestion.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                            if (typeUrlPrefix === undefined) {
+                                typeUrlPrefix = "type.googleapis.com";
+                            }
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.CompletionSuggestion";
+                        };
+    
+                        return CompletionSuggestion;
+                    })();
+    
+                    v1.CompletionService = (function() {
+    
+                        /**
+                         * Constructs a new CompletionService service.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @classdesc Represents a CompletionService
+                         * @extends $protobuf.rpc.Service
+                         * @constructor
+                         * @param {$protobuf.RPCImpl} rpcImpl RPC implementation
+                         * @param {boolean} [requestDelimited=false] Whether requests are length-delimited
+                         * @param {boolean} [responseDelimited=false] Whether responses are length-delimited
+                         */
+                        function CompletionService(rpcImpl, requestDelimited, responseDelimited) {
+                            $protobuf.rpc.Service.call(this, rpcImpl, requestDelimited, responseDelimited);
+                        }
+    
+                        (CompletionService.prototype = Object.create($protobuf.rpc.Service.prototype)).constructor = CompletionService;
+    
+                        /**
+                         * Creates new CompletionService service using the specified rpc implementation.
+                         * @function create
+                         * @memberof google.cloud.discoveryengine.v1.CompletionService
+                         * @static
+                         * @param {$protobuf.RPCImpl} rpcImpl RPC implementation
+                         * @param {boolean} [requestDelimited=false] Whether requests are length-delimited
+                         * @param {boolean} [responseDelimited=false] Whether responses are length-delimited
+                         * @returns {CompletionService} RPC service. Useful where requests and/or responses are streamed.
+                         */
+                        CompletionService.create = function create(rpcImpl, requestDelimited, responseDelimited) {
+                            return new this(rpcImpl, requestDelimited, responseDelimited);
+                        };
+    
+                        /**
+                         * Callback as used by {@link google.cloud.discoveryengine.v1.CompletionService|completeQuery}.
+                         * @memberof google.cloud.discoveryengine.v1.CompletionService
+                         * @typedef CompleteQueryCallback
+                         * @type {function}
+                         * @param {Error|null} error Error, if any
+                         * @param {google.cloud.discoveryengine.v1.CompleteQueryResponse} [response] CompleteQueryResponse
+                         */
+    
+                        /**
+                         * Calls CompleteQuery.
+                         * @function completeQuery
+                         * @memberof google.cloud.discoveryengine.v1.CompletionService
+                         * @instance
+                         * @param {google.cloud.discoveryengine.v1.ICompleteQueryRequest} request CompleteQueryRequest message or plain object
+                         * @param {google.cloud.discoveryengine.v1.CompletionService.CompleteQueryCallback} callback Node-style callback called with the error, if any, and CompleteQueryResponse
+                         * @returns {undefined}
+                         * @variation 1
+                         */
+                        Object.defineProperty(CompletionService.prototype.completeQuery = function completeQuery(request, callback) {
+                            return this.rpcCall(completeQuery, $root.google.cloud.discoveryengine.v1.CompleteQueryRequest, $root.google.cloud.discoveryengine.v1.CompleteQueryResponse, request, callback);
+                        }, "name", { value: "CompleteQuery" });
+    
+                        /**
+                         * Calls CompleteQuery.
+                         * @function completeQuery
+                         * @memberof google.cloud.discoveryengine.v1.CompletionService
+                         * @instance
+                         * @param {google.cloud.discoveryengine.v1.ICompleteQueryRequest} request CompleteQueryRequest message or plain object
+                         * @returns {Promise<google.cloud.discoveryengine.v1.CompleteQueryResponse>} Promise
+                         * @variation 2
+                         */
+    
+                        /**
+                         * Callback as used by {@link google.cloud.discoveryengine.v1.CompletionService|importSuggestionDenyListEntries}.
+                         * @memberof google.cloud.discoveryengine.v1.CompletionService
+                         * @typedef ImportSuggestionDenyListEntriesCallback
+                         * @type {function}
+                         * @param {Error|null} error Error, if any
+                         * @param {google.longrunning.Operation} [response] Operation
+                         */
+    
+                        /**
+                         * Calls ImportSuggestionDenyListEntries.
+                         * @function importSuggestionDenyListEntries
+                         * @memberof google.cloud.discoveryengine.v1.CompletionService
+                         * @instance
+                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesRequest} request ImportSuggestionDenyListEntriesRequest message or plain object
+                         * @param {google.cloud.discoveryengine.v1.CompletionService.ImportSuggestionDenyListEntriesCallback} callback Node-style callback called with the error, if any, and Operation
+                         * @returns {undefined}
+                         * @variation 1
+                         */
+                        Object.defineProperty(CompletionService.prototype.importSuggestionDenyListEntries = function importSuggestionDenyListEntries(request, callback) {
+                            return this.rpcCall(importSuggestionDenyListEntries, $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest, $root.google.longrunning.Operation, request, callback);
+                        }, "name", { value: "ImportSuggestionDenyListEntries" });
+    
+                        /**
+                         * Calls ImportSuggestionDenyListEntries.
+                         * @function importSuggestionDenyListEntries
+                         * @memberof google.cloud.discoveryengine.v1.CompletionService
+                         * @instance
+                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesRequest} request ImportSuggestionDenyListEntriesRequest message or plain object
+                         * @returns {Promise<google.longrunning.Operation>} Promise
+                         * @variation 2
+                         */
+    
+                        /**
+                         * Callback as used by {@link google.cloud.discoveryengine.v1.CompletionService|purgeSuggestionDenyListEntries}.
+                         * @memberof google.cloud.discoveryengine.v1.CompletionService
+                         * @typedef PurgeSuggestionDenyListEntriesCallback
+                         * @type {function}
+                         * @param {Error|null} error Error, if any
+                         * @param {google.longrunning.Operation} [response] Operation
+                         */
+    
+                        /**
+                         * Calls PurgeSuggestionDenyListEntries.
+                         * @function purgeSuggestionDenyListEntries
+                         * @memberof google.cloud.discoveryengine.v1.CompletionService
+                         * @instance
+                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesRequest} request PurgeSuggestionDenyListEntriesRequest message or plain object
+                         * @param {google.cloud.discoveryengine.v1.CompletionService.PurgeSuggestionDenyListEntriesCallback} callback Node-style callback called with the error, if any, and Operation
+                         * @returns {undefined}
+                         * @variation 1
+                         */
+                        Object.defineProperty(CompletionService.prototype.purgeSuggestionDenyListEntries = function purgeSuggestionDenyListEntries(request, callback) {
+                            return this.rpcCall(purgeSuggestionDenyListEntries, $root.google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest, $root.google.longrunning.Operation, request, callback);
+                        }, "name", { value: "PurgeSuggestionDenyListEntries" });
+    
+                        /**
+                         * Calls PurgeSuggestionDenyListEntries.
+                         * @function purgeSuggestionDenyListEntries
+                         * @memberof google.cloud.discoveryengine.v1.CompletionService
+                         * @instance
+                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesRequest} request PurgeSuggestionDenyListEntriesRequest message or plain object
+                         * @returns {Promise<google.longrunning.Operation>} Promise
+                         * @variation 2
+                         */
+    
+                        /**
+                         * Callback as used by {@link google.cloud.discoveryengine.v1.CompletionService|importCompletionSuggestions}.
+                         * @memberof google.cloud.discoveryengine.v1.CompletionService
+                         * @typedef ImportCompletionSuggestionsCallback
+                         * @type {function}
+                         * @param {Error|null} error Error, if any
+                         * @param {google.longrunning.Operation} [response] Operation
+                         */
+    
+                        /**
+                         * Calls ImportCompletionSuggestions.
+                         * @function importCompletionSuggestions
+                         * @memberof google.cloud.discoveryengine.v1.CompletionService
+                         * @instance
+                         * @param {google.cloud.discoveryengine.v1.IImportCompletionSuggestionsRequest} request ImportCompletionSuggestionsRequest message or plain object
+                         * @param {google.cloud.discoveryengine.v1.CompletionService.ImportCompletionSuggestionsCallback} callback Node-style callback called with the error, if any, and Operation
+                         * @returns {undefined}
+                         * @variation 1
+                         */
+                        Object.defineProperty(CompletionService.prototype.importCompletionSuggestions = function importCompletionSuggestions(request, callback) {
+                            return this.rpcCall(importCompletionSuggestions, $root.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest, $root.google.longrunning.Operation, request, callback);
+                        }, "name", { value: "ImportCompletionSuggestions" });
+    
+                        /**
+                         * Calls ImportCompletionSuggestions.
+                         * @function importCompletionSuggestions
+                         * @memberof google.cloud.discoveryengine.v1.CompletionService
+                         * @instance
+                         * @param {google.cloud.discoveryengine.v1.IImportCompletionSuggestionsRequest} request ImportCompletionSuggestionsRequest message or plain object
+                         * @returns {Promise<google.longrunning.Operation>} Promise
+                         * @variation 2
+                         */
+    
+                        /**
+                         * Callback as used by {@link google.cloud.discoveryengine.v1.CompletionService|purgeCompletionSuggestions}.
+                         * @memberof google.cloud.discoveryengine.v1.CompletionService
+                         * @typedef PurgeCompletionSuggestionsCallback
+                         * @type {function}
+                         * @param {Error|null} error Error, if any
+                         * @param {google.longrunning.Operation} [response] Operation
+                         */
+    
+                        /**
+                         * Calls PurgeCompletionSuggestions.
+                         * @function purgeCompletionSuggestions
+                         * @memberof google.cloud.discoveryengine.v1.CompletionService
+                         * @instance
+                         * @param {google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsRequest} request PurgeCompletionSuggestionsRequest message or plain object
+                         * @param {google.cloud.discoveryengine.v1.CompletionService.PurgeCompletionSuggestionsCallback} callback Node-style callback called with the error, if any, and Operation
+                         * @returns {undefined}
+                         * @variation 1
+                         */
+                        Object.defineProperty(CompletionService.prototype.purgeCompletionSuggestions = function purgeCompletionSuggestions(request, callback) {
+                            return this.rpcCall(purgeCompletionSuggestions, $root.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest, $root.google.longrunning.Operation, request, callback);
+                        }, "name", { value: "PurgeCompletionSuggestions" });
+    
+                        /**
+                         * Calls PurgeCompletionSuggestions.
+                         * @function purgeCompletionSuggestions
+                         * @memberof google.cloud.discoveryengine.v1.CompletionService
+                         * @instance
+                         * @param {google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsRequest} request PurgeCompletionSuggestionsRequest message or plain object
+                         * @returns {Promise<google.longrunning.Operation>} Promise
+                         * @variation 2
+                         */
+    
+                        return CompletionService;
+                    })();
+    
+                    v1.CompleteQueryRequest = (function() {
+    
+                        /**
+                         * Properties of a CompleteQueryRequest.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @interface ICompleteQueryRequest
+                         * @property {string|null} [dataStore] CompleteQueryRequest dataStore
+                         * @property {string|null} [query] CompleteQueryRequest query
+                         * @property {string|null} [queryModel] CompleteQueryRequest queryModel
+                         * @property {string|null} [userPseudoId] CompleteQueryRequest userPseudoId
+                         * @property {boolean|null} [includeTailSuggestions] CompleteQueryRequest includeTailSuggestions
+                         */
+    
+                        /**
+                         * Constructs a new CompleteQueryRequest.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @classdesc Represents a CompleteQueryRequest.
+                         * @implements ICompleteQueryRequest
+                         * @constructor
+                         * @param {google.cloud.discoveryengine.v1.ICompleteQueryRequest=} [properties] Properties to set
+                         */
+                        function CompleteQueryRequest(properties) {
+                            if (properties)
+                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                    if (properties[keys[i]] != null)
+                                        this[keys[i]] = properties[keys[i]];
+                        }
+    
+                        /**
+                         * CompleteQueryRequest dataStore.
+                         * @member {string} dataStore
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @instance
+                         */
+                        CompleteQueryRequest.prototype.dataStore = "";
+    
+                        /**
+                         * CompleteQueryRequest query.
+                         * @member {string} query
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @instance
+                         */
+                        CompleteQueryRequest.prototype.query = "";
+    
+                        /**
+                         * CompleteQueryRequest queryModel.
+                         * @member {string} queryModel
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @instance
+                         */
+                        CompleteQueryRequest.prototype.queryModel = "";
+    
+                        /**
+                         * CompleteQueryRequest userPseudoId.
+                         * @member {string} userPseudoId
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @instance
+                         */
+                        CompleteQueryRequest.prototype.userPseudoId = "";
+    
+                        /**
+                         * CompleteQueryRequest includeTailSuggestions.
+                         * @member {boolean} includeTailSuggestions
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @instance
+                         */
+                        CompleteQueryRequest.prototype.includeTailSuggestions = false;
+    
+                        /**
+                         * Creates a new CompleteQueryRequest instance using the specified properties.
+                         * @function create
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.ICompleteQueryRequest=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.CompleteQueryRequest} CompleteQueryRequest instance
+                         */
+                        CompleteQueryRequest.create = function create(properties) {
+                            return new CompleteQueryRequest(properties);
+                        };
+    
+                        /**
+                         * Encodes the specified CompleteQueryRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.CompleteQueryRequest.verify|verify} messages.
+                         * @function encode
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.ICompleteQueryRequest} message CompleteQueryRequest message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        CompleteQueryRequest.encode = function encode(message, writer) {
+                            if (!writer)
+                                writer = $Writer.create();
+                            if (message.dataStore != null && Object.hasOwnProperty.call(message, "dataStore"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.dataStore);
+                            if (message.query != null && Object.hasOwnProperty.call(message, "query"))
+                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.query);
+                            if (message.queryModel != null && Object.hasOwnProperty.call(message, "queryModel"))
+                                writer.uint32(/* id 3, wireType 2 =*/26).string(message.queryModel);
+                            if (message.userPseudoId != null && Object.hasOwnProperty.call(message, "userPseudoId"))
+                                writer.uint32(/* id 4, wireType 2 =*/34).string(message.userPseudoId);
+                            if (message.includeTailSuggestions != null && Object.hasOwnProperty.call(message, "includeTailSuggestions"))
+                                writer.uint32(/* id 5, wireType 0 =*/40).bool(message.includeTailSuggestions);
+                            return writer;
+                        };
+    
+                        /**
+                         * Encodes the specified CompleteQueryRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.CompleteQueryRequest.verify|verify} messages.
+                         * @function encodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.ICompleteQueryRequest} message CompleteQueryRequest message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        CompleteQueryRequest.encodeDelimited = function encodeDelimited(message, writer) {
+                            return this.encode(message, writer).ldelim();
+                        };
+    
+                        /**
+                         * Decodes a CompleteQueryRequest message from the specified reader or buffer.
+                         * @function decode
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @param {number} [length] Message length if known beforehand
+                         * @returns {google.cloud.discoveryengine.v1.CompleteQueryRequest} CompleteQueryRequest
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        CompleteQueryRequest.decode = function decode(reader, length) {
+                            if (!(reader instanceof $Reader))
+                                reader = $Reader.create(reader);
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.CompleteQueryRequest();
+                            while (reader.pos < end) {
+                                var tag = reader.uint32();
+                                switch (tag >>> 3) {
+                                case 1: {
+                                        message.dataStore = reader.string();
+                                        break;
+                                    }
+                                case 2: {
+                                        message.query = reader.string();
+                                        break;
+                                    }
+                                case 3: {
+                                        message.queryModel = reader.string();
+                                        break;
+                                    }
+                                case 4: {
+                                        message.userPseudoId = reader.string();
+                                        break;
+                                    }
+                                case 5: {
+                                        message.includeTailSuggestions = reader.bool();
+                                        break;
+                                    }
+                                default:
+                                    reader.skipType(tag & 7);
+                                    break;
+                                }
+                            }
+                            return message;
+                        };
+    
+                        /**
+                         * Decodes a CompleteQueryRequest message from the specified reader or buffer, length delimited.
+                         * @function decodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @returns {google.cloud.discoveryengine.v1.CompleteQueryRequest} CompleteQueryRequest
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        CompleteQueryRequest.decodeDelimited = function decodeDelimited(reader) {
+                            if (!(reader instanceof $Reader))
+                                reader = new $Reader(reader);
+                            return this.decode(reader, reader.uint32());
+                        };
+    
+                        /**
+                         * Verifies a CompleteQueryRequest message.
+                         * @function verify
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @static
+                         * @param {Object.<string,*>} message Plain object to verify
+                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                         */
+                        CompleteQueryRequest.verify = function verify(message) {
+                            if (typeof message !== "object" || message === null)
+                                return "object expected";
+                            if (message.dataStore != null && message.hasOwnProperty("dataStore"))
+                                if (!$util.isString(message.dataStore))
+                                    return "dataStore: string expected";
+                            if (message.query != null && message.hasOwnProperty("query"))
+                                if (!$util.isString(message.query))
+                                    return "query: string expected";
+                            if (message.queryModel != null && message.hasOwnProperty("queryModel"))
+                                if (!$util.isString(message.queryModel))
+                                    return "queryModel: string expected";
+                            if (message.userPseudoId != null && message.hasOwnProperty("userPseudoId"))
+                                if (!$util.isString(message.userPseudoId))
+                                    return "userPseudoId: string expected";
+                            if (message.includeTailSuggestions != null && message.hasOwnProperty("includeTailSuggestions"))
+                                if (typeof message.includeTailSuggestions !== "boolean")
+                                    return "includeTailSuggestions: boolean expected";
+                            return null;
+                        };
+    
+                        /**
+                         * Creates a CompleteQueryRequest message from a plain object. Also converts values to their respective internal types.
+                         * @function fromObject
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @static
+                         * @param {Object.<string,*>} object Plain object
+                         * @returns {google.cloud.discoveryengine.v1.CompleteQueryRequest} CompleteQueryRequest
+                         */
+                        CompleteQueryRequest.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.CompleteQueryRequest)
+                                return object;
+                            var message = new $root.google.cloud.discoveryengine.v1.CompleteQueryRequest();
+                            if (object.dataStore != null)
+                                message.dataStore = String(object.dataStore);
+                            if (object.query != null)
+                                message.query = String(object.query);
+                            if (object.queryModel != null)
+                                message.queryModel = String(object.queryModel);
+                            if (object.userPseudoId != null)
+                                message.userPseudoId = String(object.userPseudoId);
+                            if (object.includeTailSuggestions != null)
+                                message.includeTailSuggestions = Boolean(object.includeTailSuggestions);
+                            return message;
+                        };
+    
+                        /**
+                         * Creates a plain object from a CompleteQueryRequest message. Also converts values to other types if specified.
+                         * @function toObject
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.CompleteQueryRequest} message CompleteQueryRequest
+                         * @param {$protobuf.IConversionOptions} [options] Conversion options
+                         * @returns {Object.<string,*>} Plain object
+                         */
+                        CompleteQueryRequest.toObject = function toObject(message, options) {
+                            if (!options)
+                                options = {};
+                            var object = {};
+                            if (options.defaults) {
+                                object.dataStore = "";
+                                object.query = "";
+                                object.queryModel = "";
+                                object.userPseudoId = "";
+                                object.includeTailSuggestions = false;
+                            }
+                            if (message.dataStore != null && message.hasOwnProperty("dataStore"))
+                                object.dataStore = message.dataStore;
+                            if (message.query != null && message.hasOwnProperty("query"))
+                                object.query = message.query;
+                            if (message.queryModel != null && message.hasOwnProperty("queryModel"))
+                                object.queryModel = message.queryModel;
+                            if (message.userPseudoId != null && message.hasOwnProperty("userPseudoId"))
+                                object.userPseudoId = message.userPseudoId;
+                            if (message.includeTailSuggestions != null && message.hasOwnProperty("includeTailSuggestions"))
+                                object.includeTailSuggestions = message.includeTailSuggestions;
+                            return object;
+                        };
+    
+                        /**
+                         * Converts this CompleteQueryRequest to JSON.
+                         * @function toJSON
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @instance
+                         * @returns {Object.<string,*>} JSON object
+                         */
+                        CompleteQueryRequest.prototype.toJSON = function toJSON() {
+                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                        };
+    
+                        /**
+                         * Gets the default type url for CompleteQueryRequest
+                         * @function getTypeUrl
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @static
+                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns {string} The default type url
+                         */
+                        CompleteQueryRequest.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                            if (typeUrlPrefix === undefined) {
+                                typeUrlPrefix = "type.googleapis.com";
+                            }
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.CompleteQueryRequest";
+                        };
+    
+                        return CompleteQueryRequest;
+                    })();
+    
+                    v1.CompleteQueryResponse = (function() {
+    
+                        /**
+                         * Properties of a CompleteQueryResponse.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @interface ICompleteQueryResponse
+                         * @property {Array.<google.cloud.discoveryengine.v1.CompleteQueryResponse.IQuerySuggestion>|null} [querySuggestions] CompleteQueryResponse querySuggestions
+                         * @property {boolean|null} [tailMatchTriggered] CompleteQueryResponse tailMatchTriggered
+                         */
+    
+                        /**
+                         * Constructs a new CompleteQueryResponse.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @classdesc Represents a CompleteQueryResponse.
+                         * @implements ICompleteQueryResponse
+                         * @constructor
+                         * @param {google.cloud.discoveryengine.v1.ICompleteQueryResponse=} [properties] Properties to set
+                         */
+                        function CompleteQueryResponse(properties) {
+                            this.querySuggestions = [];
+                            if (properties)
+                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                    if (properties[keys[i]] != null)
+                                        this[keys[i]] = properties[keys[i]];
+                        }
+    
+                        /**
+                         * CompleteQueryResponse querySuggestions.
+                         * @member {Array.<google.cloud.discoveryengine.v1.CompleteQueryResponse.IQuerySuggestion>} querySuggestions
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
+                         * @instance
+                         */
+                        CompleteQueryResponse.prototype.querySuggestions = $util.emptyArray;
+    
+                        /**
+                         * CompleteQueryResponse tailMatchTriggered.
+                         * @member {boolean} tailMatchTriggered
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
+                         * @instance
+                         */
+                        CompleteQueryResponse.prototype.tailMatchTriggered = false;
+    
+                        /**
+                         * Creates a new CompleteQueryResponse instance using the specified properties.
+                         * @function create
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.ICompleteQueryResponse=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.CompleteQueryResponse} CompleteQueryResponse instance
+                         */
+                        CompleteQueryResponse.create = function create(properties) {
+                            return new CompleteQueryResponse(properties);
+                        };
+    
+                        /**
+                         * Encodes the specified CompleteQueryResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.CompleteQueryResponse.verify|verify} messages.
+                         * @function encode
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.ICompleteQueryResponse} message CompleteQueryResponse message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        CompleteQueryResponse.encode = function encode(message, writer) {
+                            if (!writer)
+                                writer = $Writer.create();
+                            if (message.querySuggestions != null && message.querySuggestions.length)
+                                for (var i = 0; i < message.querySuggestions.length; ++i)
+                                    $root.google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion.encode(message.querySuggestions[i], writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                            if (message.tailMatchTriggered != null && Object.hasOwnProperty.call(message, "tailMatchTriggered"))
+                                writer.uint32(/* id 2, wireType 0 =*/16).bool(message.tailMatchTriggered);
+                            return writer;
+                        };
+    
+                        /**
+                         * Encodes the specified CompleteQueryResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.CompleteQueryResponse.verify|verify} messages.
+                         * @function encodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.ICompleteQueryResponse} message CompleteQueryResponse message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        CompleteQueryResponse.encodeDelimited = function encodeDelimited(message, writer) {
+                            return this.encode(message, writer).ldelim();
+                        };
+    
+                        /**
+                         * Decodes a CompleteQueryResponse message from the specified reader or buffer.
+                         * @function decode
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @param {number} [length] Message length if known beforehand
+                         * @returns {google.cloud.discoveryengine.v1.CompleteQueryResponse} CompleteQueryResponse
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        CompleteQueryResponse.decode = function decode(reader, length) {
+                            if (!(reader instanceof $Reader))
+                                reader = $Reader.create(reader);
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.CompleteQueryResponse();
+                            while (reader.pos < end) {
+                                var tag = reader.uint32();
+                                switch (tag >>> 3) {
+                                case 1: {
+                                        if (!(message.querySuggestions && message.querySuggestions.length))
+                                            message.querySuggestions = [];
+                                        message.querySuggestions.push($root.google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion.decode(reader, reader.uint32()));
+                                        break;
+                                    }
+                                case 2: {
+                                        message.tailMatchTriggered = reader.bool();
+                                        break;
+                                    }
+                                default:
+                                    reader.skipType(tag & 7);
+                                    break;
+                                }
+                            }
+                            return message;
+                        };
+    
+                        /**
+                         * Decodes a CompleteQueryResponse message from the specified reader or buffer, length delimited.
+                         * @function decodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @returns {google.cloud.discoveryengine.v1.CompleteQueryResponse} CompleteQueryResponse
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        CompleteQueryResponse.decodeDelimited = function decodeDelimited(reader) {
+                            if (!(reader instanceof $Reader))
+                                reader = new $Reader(reader);
+                            return this.decode(reader, reader.uint32());
+                        };
+    
+                        /**
+                         * Verifies a CompleteQueryResponse message.
+                         * @function verify
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
+                         * @static
+                         * @param {Object.<string,*>} message Plain object to verify
+                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                         */
+                        CompleteQueryResponse.verify = function verify(message) {
+                            if (typeof message !== "object" || message === null)
+                                return "object expected";
+                            if (message.querySuggestions != null && message.hasOwnProperty("querySuggestions")) {
+                                if (!Array.isArray(message.querySuggestions))
+                                    return "querySuggestions: array expected";
+                                for (var i = 0; i < message.querySuggestions.length; ++i) {
+                                    var error = $root.google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion.verify(message.querySuggestions[i]);
+                                    if (error)
+                                        return "querySuggestions." + error;
+                                }
+                            }
+                            if (message.tailMatchTriggered != null && message.hasOwnProperty("tailMatchTriggered"))
+                                if (typeof message.tailMatchTriggered !== "boolean")
+                                    return "tailMatchTriggered: boolean expected";
+                            return null;
+                        };
+    
+                        /**
+                         * Creates a CompleteQueryResponse message from a plain object. Also converts values to their respective internal types.
+                         * @function fromObject
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
+                         * @static
+                         * @param {Object.<string,*>} object Plain object
+                         * @returns {google.cloud.discoveryengine.v1.CompleteQueryResponse} CompleteQueryResponse
+                         */
+                        CompleteQueryResponse.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.CompleteQueryResponse)
+                                return object;
+                            var message = new $root.google.cloud.discoveryengine.v1.CompleteQueryResponse();
+                            if (object.querySuggestions) {
+                                if (!Array.isArray(object.querySuggestions))
+                                    throw TypeError(".google.cloud.discoveryengine.v1.CompleteQueryResponse.querySuggestions: array expected");
+                                message.querySuggestions = [];
+                                for (var i = 0; i < object.querySuggestions.length; ++i) {
+                                    if (typeof object.querySuggestions[i] !== "object")
+                                        throw TypeError(".google.cloud.discoveryengine.v1.CompleteQueryResponse.querySuggestions: object expected");
+                                    message.querySuggestions[i] = $root.google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion.fromObject(object.querySuggestions[i]);
+                                }
+                            }
+                            if (object.tailMatchTriggered != null)
+                                message.tailMatchTriggered = Boolean(object.tailMatchTriggered);
+                            return message;
+                        };
+    
+                        /**
+                         * Creates a plain object from a CompleteQueryResponse message. Also converts values to other types if specified.
+                         * @function toObject
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.CompleteQueryResponse} message CompleteQueryResponse
+                         * @param {$protobuf.IConversionOptions} [options] Conversion options
+                         * @returns {Object.<string,*>} Plain object
+                         */
+                        CompleteQueryResponse.toObject = function toObject(message, options) {
+                            if (!options)
+                                options = {};
+                            var object = {};
+                            if (options.arrays || options.defaults)
+                                object.querySuggestions = [];
+                            if (options.defaults)
+                                object.tailMatchTriggered = false;
+                            if (message.querySuggestions && message.querySuggestions.length) {
+                                object.querySuggestions = [];
+                                for (var j = 0; j < message.querySuggestions.length; ++j)
+                                    object.querySuggestions[j] = $root.google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion.toObject(message.querySuggestions[j], options);
+                            }
+                            if (message.tailMatchTriggered != null && message.hasOwnProperty("tailMatchTriggered"))
+                                object.tailMatchTriggered = message.tailMatchTriggered;
+                            return object;
+                        };
+    
+                        /**
+                         * Converts this CompleteQueryResponse to JSON.
+                         * @function toJSON
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
+                         * @instance
+                         * @returns {Object.<string,*>} JSON object
+                         */
+                        CompleteQueryResponse.prototype.toJSON = function toJSON() {
+                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                        };
+    
+                        /**
+                         * Gets the default type url for CompleteQueryResponse
+                         * @function getTypeUrl
+                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
+                         * @static
+                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns {string} The default type url
+                         */
+                        CompleteQueryResponse.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                            if (typeUrlPrefix === undefined) {
+                                typeUrlPrefix = "type.googleapis.com";
+                            }
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.CompleteQueryResponse";
+                        };
+    
+                        CompleteQueryResponse.QuerySuggestion = (function() {
+    
+                            /**
+                             * Properties of a QuerySuggestion.
+                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
+                             * @interface IQuerySuggestion
+                             * @property {string|null} [suggestion] QuerySuggestion suggestion
+                             * @property {Array.<string>|null} [completableFieldPaths] QuerySuggestion completableFieldPaths
+                             */
+    
+                            /**
+                             * Constructs a new QuerySuggestion.
+                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
+                             * @classdesc Represents a QuerySuggestion.
+                             * @implements IQuerySuggestion
+                             * @constructor
+                             * @param {google.cloud.discoveryengine.v1.CompleteQueryResponse.IQuerySuggestion=} [properties] Properties to set
+                             */
+                            function QuerySuggestion(properties) {
+                                this.completableFieldPaths = [];
+                                if (properties)
+                                    for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                        if (properties[keys[i]] != null)
+                                            this[keys[i]] = properties[keys[i]];
+                            }
+    
+                            /**
+                             * QuerySuggestion suggestion.
+                             * @member {string} suggestion
+                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * @instance
+                             */
+                            QuerySuggestion.prototype.suggestion = "";
+    
+                            /**
+                             * QuerySuggestion completableFieldPaths.
+                             * @member {Array.<string>} completableFieldPaths
+                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * @instance
+                             */
+                            QuerySuggestion.prototype.completableFieldPaths = $util.emptyArray;
+    
+                            /**
+                             * Creates a new QuerySuggestion instance using the specified properties.
+                             * @function create
+                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.CompleteQueryResponse.IQuerySuggestion=} [properties] Properties to set
+                             * @returns {google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion} QuerySuggestion instance
+                             */
+                            QuerySuggestion.create = function create(properties) {
+                                return new QuerySuggestion(properties);
+                            };
+    
+                            /**
+                             * Encodes the specified QuerySuggestion message. Does not implicitly {@link google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion.verify|verify} messages.
+                             * @function encode
+                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.CompleteQueryResponse.IQuerySuggestion} message QuerySuggestion message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            QuerySuggestion.encode = function encode(message, writer) {
+                                if (!writer)
+                                    writer = $Writer.create();
+                                if (message.suggestion != null && Object.hasOwnProperty.call(message, "suggestion"))
+                                    writer.uint32(/* id 1, wireType 2 =*/10).string(message.suggestion);
+                                if (message.completableFieldPaths != null && message.completableFieldPaths.length)
+                                    for (var i = 0; i < message.completableFieldPaths.length; ++i)
+                                        writer.uint32(/* id 2, wireType 2 =*/18).string(message.completableFieldPaths[i]);
+                                return writer;
+                            };
+    
+                            /**
+                             * Encodes the specified QuerySuggestion message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion.verify|verify} messages.
+                             * @function encodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.CompleteQueryResponse.IQuerySuggestion} message QuerySuggestion message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            QuerySuggestion.encodeDelimited = function encodeDelimited(message, writer) {
+                                return this.encode(message, writer).ldelim();
+                            };
+    
+                            /**
+                             * Decodes a QuerySuggestion message from the specified reader or buffer.
+                             * @function decode
+                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @param {number} [length] Message length if known beforehand
+                             * @returns {google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion} QuerySuggestion
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            QuerySuggestion.decode = function decode(reader, length) {
+                                if (!(reader instanceof $Reader))
+                                    reader = $Reader.create(reader);
+                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion();
+                                while (reader.pos < end) {
+                                    var tag = reader.uint32();
+                                    switch (tag >>> 3) {
+                                    case 1: {
+                                            message.suggestion = reader.string();
+                                            break;
+                                        }
+                                    case 2: {
+                                            if (!(message.completableFieldPaths && message.completableFieldPaths.length))
+                                                message.completableFieldPaths = [];
+                                            message.completableFieldPaths.push(reader.string());
+                                            break;
+                                        }
+                                    default:
+                                        reader.skipType(tag & 7);
+                                        break;
+                                    }
+                                }
+                                return message;
+                            };
+    
+                            /**
+                             * Decodes a QuerySuggestion message from the specified reader or buffer, length delimited.
+                             * @function decodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @returns {google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion} QuerySuggestion
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            QuerySuggestion.decodeDelimited = function decodeDelimited(reader) {
+                                if (!(reader instanceof $Reader))
+                                    reader = new $Reader(reader);
+                                return this.decode(reader, reader.uint32());
+                            };
+    
+                            /**
+                             * Verifies a QuerySuggestion message.
+                             * @function verify
+                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * @static
+                             * @param {Object.<string,*>} message Plain object to verify
+                             * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                             */
+                            QuerySuggestion.verify = function verify(message) {
+                                if (typeof message !== "object" || message === null)
+                                    return "object expected";
+                                if (message.suggestion != null && message.hasOwnProperty("suggestion"))
+                                    if (!$util.isString(message.suggestion))
+                                        return "suggestion: string expected";
+                                if (message.completableFieldPaths != null && message.hasOwnProperty("completableFieldPaths")) {
+                                    if (!Array.isArray(message.completableFieldPaths))
+                                        return "completableFieldPaths: array expected";
+                                    for (var i = 0; i < message.completableFieldPaths.length; ++i)
+                                        if (!$util.isString(message.completableFieldPaths[i]))
+                                            return "completableFieldPaths: string[] expected";
+                                }
+                                return null;
+                            };
+    
+                            /**
+                             * Creates a QuerySuggestion message from a plain object. Also converts values to their respective internal types.
+                             * @function fromObject
+                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * @static
+                             * @param {Object.<string,*>} object Plain object
+                             * @returns {google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion} QuerySuggestion
+                             */
+                            QuerySuggestion.fromObject = function fromObject(object) {
+                                if (object instanceof $root.google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion)
+                                    return object;
+                                var message = new $root.google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion();
+                                if (object.suggestion != null)
+                                    message.suggestion = String(object.suggestion);
+                                if (object.completableFieldPaths) {
+                                    if (!Array.isArray(object.completableFieldPaths))
+                                        throw TypeError(".google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion.completableFieldPaths: array expected");
+                                    message.completableFieldPaths = [];
+                                    for (var i = 0; i < object.completableFieldPaths.length; ++i)
+                                        message.completableFieldPaths[i] = String(object.completableFieldPaths[i]);
+                                }
+                                return message;
+                            };
+    
+                            /**
+                             * Creates a plain object from a QuerySuggestion message. Also converts values to other types if specified.
+                             * @function toObject
+                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion} message QuerySuggestion
+                             * @param {$protobuf.IConversionOptions} [options] Conversion options
+                             * @returns {Object.<string,*>} Plain object
+                             */
+                            QuerySuggestion.toObject = function toObject(message, options) {
+                                if (!options)
+                                    options = {};
+                                var object = {};
+                                if (options.arrays || options.defaults)
+                                    object.completableFieldPaths = [];
+                                if (options.defaults)
+                                    object.suggestion = "";
+                                if (message.suggestion != null && message.hasOwnProperty("suggestion"))
+                                    object.suggestion = message.suggestion;
+                                if (message.completableFieldPaths && message.completableFieldPaths.length) {
+                                    object.completableFieldPaths = [];
+                                    for (var j = 0; j < message.completableFieldPaths.length; ++j)
+                                        object.completableFieldPaths[j] = message.completableFieldPaths[j];
+                                }
+                                return object;
+                            };
+    
+                            /**
+                             * Converts this QuerySuggestion to JSON.
+                             * @function toJSON
+                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * @instance
+                             * @returns {Object.<string,*>} JSON object
+                             */
+                            QuerySuggestion.prototype.toJSON = function toJSON() {
+                                return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                            };
+    
+                            /**
+                             * Gets the default type url for QuerySuggestion
+                             * @function getTypeUrl
+                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * @static
+                             * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                             * @returns {string} The default type url
+                             */
+                            QuerySuggestion.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                                if (typeUrlPrefix === undefined) {
+                                    typeUrlPrefix = "type.googleapis.com";
+                                }
+                                return typeUrlPrefix + "/google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion";
+                            };
+    
+                            return QuerySuggestion;
+                        })();
+    
+                        return CompleteQueryResponse;
+                    })();
+    
+                    v1.GcsSource = (function() {
+    
+                        /**
+                         * Properties of a GcsSource.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @interface IGcsSource
+                         * @property {Array.<string>|null} [inputUris] GcsSource inputUris
+                         * @property {string|null} [dataSchema] GcsSource dataSchema
+                         */
+    
+                        /**
+                         * Constructs a new GcsSource.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @classdesc Represents a GcsSource.
+                         * @implements IGcsSource
+                         * @constructor
+                         * @param {google.cloud.discoveryengine.v1.IGcsSource=} [properties] Properties to set
+                         */
+                        function GcsSource(properties) {
+                            this.inputUris = [];
+                            if (properties)
+                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                    if (properties[keys[i]] != null)
+                                        this[keys[i]] = properties[keys[i]];
+                        }
+    
+                        /**
+                         * GcsSource inputUris.
+                         * @member {Array.<string>} inputUris
+                         * @memberof google.cloud.discoveryengine.v1.GcsSource
+                         * @instance
+                         */
+                        GcsSource.prototype.inputUris = $util.emptyArray;
+    
+                        /**
+                         * GcsSource dataSchema.
+                         * @member {string} dataSchema
+                         * @memberof google.cloud.discoveryengine.v1.GcsSource
+                         * @instance
+                         */
+                        GcsSource.prototype.dataSchema = "";
+    
+                        /**
+                         * Creates a new GcsSource instance using the specified properties.
+                         * @function create
+                         * @memberof google.cloud.discoveryengine.v1.GcsSource
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.IGcsSource=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.GcsSource} GcsSource instance
+                         */
+                        GcsSource.create = function create(properties) {
+                            return new GcsSource(properties);
+                        };
+    
+                        /**
+                         * Encodes the specified GcsSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.GcsSource.verify|verify} messages.
+                         * @function encode
+                         * @memberof google.cloud.discoveryengine.v1.GcsSource
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.IGcsSource} message GcsSource message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        CustomAttribute.encode = function encode(message, writer) {
+                        GcsSource.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.text != null && message.text.length)
-                                for (var i = 0; i < message.text.length; ++i)
-                                    writer.uint32(/* id 1, wireType 2 =*/10).string(message.text[i]);
-                            if (message.numbers != null && message.numbers.length) {
-                                writer.uint32(/* id 2, wireType 2 =*/18).fork();
-                                for (var i = 0; i < message.numbers.length; ++i)
-                                    writer.double(message.numbers[i]);
-                                writer.ldelim();
-                            }
+                            if (message.inputUris != null && message.inputUris.length)
+                                for (var i = 0; i < message.inputUris.length; ++i)
+                                    writer.uint32(/* id 1, wireType 2 =*/10).string(message.inputUris[i]);
+                            if (message.dataSchema != null && Object.hasOwnProperty.call(message, "dataSchema"))
+                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.dataSchema);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified CustomAttribute message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.CustomAttribute.verify|verify} messages.
+                         * Encodes the specified GcsSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.GcsSource.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
+                         * @memberof google.cloud.discoveryengine.v1.GcsSource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ICustomAttribute} message CustomAttribute message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IGcsSource} message GcsSource message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        CustomAttribute.encodeDelimited = function encodeDelimited(message, writer) {
+                        GcsSource.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a CustomAttribute message from the specified reader or buffer.
+                         * Decodes a GcsSource message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
+                         * @memberof google.cloud.discoveryengine.v1.GcsSource
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.CustomAttribute} CustomAttribute
+                         * @returns {google.cloud.discoveryengine.v1.GcsSource} GcsSource
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        CustomAttribute.decode = function decode(reader, length) {
+                        GcsSource.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.CustomAttribute();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.GcsSource();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 1: {
-                                        if (!(message.text && message.text.length))
-                                            message.text = [];
-                                        message.text.push(reader.string());
+                                        if (!(message.inputUris && message.inputUris.length))
+                                            message.inputUris = [];
+                                        message.inputUris.push(reader.string());
                                         break;
                                     }
                                 case 2: {
-                                        if (!(message.numbers && message.numbers.length))
-                                            message.numbers = [];
-                                        if ((tag & 7) === 2) {
-                                            var end2 = reader.uint32() + reader.pos;
-                                            while (reader.pos < end2)
-                                                message.numbers.push(reader.double());
-                                        } else
-                                            message.numbers.push(reader.double());
+                                        message.dataSchema = reader.string();
                                         break;
                                     }
                                 default:
@@ -5523,156 +8843,148 @@
                         };
     
                         /**
-                         * Decodes a CustomAttribute message from the specified reader or buffer, length delimited.
+                         * Decodes a GcsSource message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
+                         * @memberof google.cloud.discoveryengine.v1.GcsSource
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.CustomAttribute} CustomAttribute
+                         * @returns {google.cloud.discoveryengine.v1.GcsSource} GcsSource
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        CustomAttribute.decodeDelimited = function decodeDelimited(reader) {
+                        GcsSource.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a CustomAttribute message.
+                         * Verifies a GcsSource message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
+                         * @memberof google.cloud.discoveryengine.v1.GcsSource
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        CustomAttribute.verify = function verify(message) {
+                        GcsSource.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            if (message.text != null && message.hasOwnProperty("text")) {
-                                if (!Array.isArray(message.text))
-                                    return "text: array expected";
-                                for (var i = 0; i < message.text.length; ++i)
-                                    if (!$util.isString(message.text[i]))
-                                        return "text: string[] expected";
-                            }
-                            if (message.numbers != null && message.hasOwnProperty("numbers")) {
-                                if (!Array.isArray(message.numbers))
-                                    return "numbers: array expected";
-                                for (var i = 0; i < message.numbers.length; ++i)
-                                    if (typeof message.numbers[i] !== "number")
-                                        return "numbers: number[] expected";
+                            if (message.inputUris != null && message.hasOwnProperty("inputUris")) {
+                                if (!Array.isArray(message.inputUris))
+                                    return "inputUris: array expected";
+                                for (var i = 0; i < message.inputUris.length; ++i)
+                                    if (!$util.isString(message.inputUris[i]))
+                                        return "inputUris: string[] expected";
                             }
+                            if (message.dataSchema != null && message.hasOwnProperty("dataSchema"))
+                                if (!$util.isString(message.dataSchema))
+                                    return "dataSchema: string expected";
                             return null;
                         };
     
                         /**
-                         * Creates a CustomAttribute message from a plain object. Also converts values to their respective internal types.
+                         * Creates a GcsSource message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
+                         * @memberof google.cloud.discoveryengine.v1.GcsSource
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.CustomAttribute} CustomAttribute
+                         * @returns {google.cloud.discoveryengine.v1.GcsSource} GcsSource
                          */
-                        CustomAttribute.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.CustomAttribute)
+                        GcsSource.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.GcsSource)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.CustomAttribute();
-                            if (object.text) {
-                                if (!Array.isArray(object.text))
-                                    throw TypeError(".google.cloud.discoveryengine.v1.CustomAttribute.text: array expected");
-                                message.text = [];
-                                for (var i = 0; i < object.text.length; ++i)
-                                    message.text[i] = String(object.text[i]);
-                            }
-                            if (object.numbers) {
-                                if (!Array.isArray(object.numbers))
-                                    throw TypeError(".google.cloud.discoveryengine.v1.CustomAttribute.numbers: array expected");
-                                message.numbers = [];
-                                for (var i = 0; i < object.numbers.length; ++i)
-                                    message.numbers[i] = Number(object.numbers[i]);
+                            var message = new $root.google.cloud.discoveryengine.v1.GcsSource();
+                            if (object.inputUris) {
+                                if (!Array.isArray(object.inputUris))
+                                    throw TypeError(".google.cloud.discoveryengine.v1.GcsSource.inputUris: array expected");
+                                message.inputUris = [];
+                                for (var i = 0; i < object.inputUris.length; ++i)
+                                    message.inputUris[i] = String(object.inputUris[i]);
                             }
+                            if (object.dataSchema != null)
+                                message.dataSchema = String(object.dataSchema);
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a CustomAttribute message. Also converts values to other types if specified.
+                         * Creates a plain object from a GcsSource message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
+                         * @memberof google.cloud.discoveryengine.v1.GcsSource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.CustomAttribute} message CustomAttribute
+                         * @param {google.cloud.discoveryengine.v1.GcsSource} message GcsSource
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        CustomAttribute.toObject = function toObject(message, options) {
+                        GcsSource.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
-                            if (options.arrays || options.defaults) {
-                                object.text = [];
-                                object.numbers = [];
-                            }
-                            if (message.text && message.text.length) {
-                                object.text = [];
-                                for (var j = 0; j < message.text.length; ++j)
-                                    object.text[j] = message.text[j];
-                            }
-                            if (message.numbers && message.numbers.length) {
-                                object.numbers = [];
-                                for (var j = 0; j < message.numbers.length; ++j)
-                                    object.numbers[j] = options.json && !isFinite(message.numbers[j]) ? String(message.numbers[j]) : message.numbers[j];
+                            if (options.arrays || options.defaults)
+                                object.inputUris = [];
+                            if (options.defaults)
+                                object.dataSchema = "";
+                            if (message.inputUris && message.inputUris.length) {
+                                object.inputUris = [];
+                                for (var j = 0; j < message.inputUris.length; ++j)
+                                    object.inputUris[j] = message.inputUris[j];
                             }
+                            if (message.dataSchema != null && message.hasOwnProperty("dataSchema"))
+                                object.dataSchema = message.dataSchema;
                             return object;
                         };
     
                         /**
-                         * Converts this CustomAttribute to JSON.
+                         * Converts this GcsSource to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
+                         * @memberof google.cloud.discoveryengine.v1.GcsSource
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        CustomAttribute.prototype.toJSON = function toJSON() {
+                        GcsSource.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for CustomAttribute
+                         * Gets the default type url for GcsSource
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.CustomAttribute
+                         * @memberof google.cloud.discoveryengine.v1.GcsSource
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        CustomAttribute.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        GcsSource.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.CustomAttribute";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.GcsSource";
                         };
     
-                        return CustomAttribute;
+                        return GcsSource;
                     })();
     
-                    v1.UserInfo = (function() {
+                    v1.BigQuerySource = (function() {
     
                         /**
-                         * Properties of a UserInfo.
+                         * Properties of a BigQuerySource.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IUserInfo
-                         * @property {string|null} [userId] UserInfo userId
-                         * @property {string|null} [userAgent] UserInfo userAgent
+                         * @interface IBigQuerySource
+                         * @property {google.type.IDate|null} [partitionDate] BigQuerySource partitionDate
+                         * @property {string|null} [projectId] BigQuerySource projectId
+                         * @property {string|null} [datasetId] BigQuerySource datasetId
+                         * @property {string|null} [tableId] BigQuerySource tableId
+                         * @property {string|null} [gcsStagingDir] BigQuerySource gcsStagingDir
+                         * @property {string|null} [dataSchema] BigQuerySource dataSchema
                          */
     
                         /**
-                         * Constructs a new UserInfo.
+                         * Constructs a new BigQuerySource.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a UserInfo.
-                         * @implements IUserInfo
+                         * @classdesc Represents a BigQuerySource.
+                         * @implements IBigQuerySource
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IUserInfo=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IBigQuerySource=} [properties] Properties to set
                          */
-                        function UserInfo(properties) {
+                        function BigQuerySource(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -5680,89 +8992,159 @@
                         }
     
                         /**
-                         * UserInfo userId.
-                         * @member {string} userId
-                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * BigQuerySource partitionDate.
+                         * @member {google.type.IDate|null|undefined} partitionDate
+                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
                          * @instance
                          */
-                        UserInfo.prototype.userId = "";
+                        BigQuerySource.prototype.partitionDate = null;
     
                         /**
-                         * UserInfo userAgent.
-                         * @member {string} userAgent
-                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * BigQuerySource projectId.
+                         * @member {string} projectId
+                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
                          * @instance
                          */
-                        UserInfo.prototype.userAgent = "";
+                        BigQuerySource.prototype.projectId = "";
     
                         /**
-                         * Creates a new UserInfo instance using the specified properties.
+                         * BigQuerySource datasetId.
+                         * @member {string} datasetId
+                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
+                         * @instance
+                         */
+                        BigQuerySource.prototype.datasetId = "";
+    
+                        /**
+                         * BigQuerySource tableId.
+                         * @member {string} tableId
+                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
+                         * @instance
+                         */
+                        BigQuerySource.prototype.tableId = "";
+    
+                        /**
+                         * BigQuerySource gcsStagingDir.
+                         * @member {string} gcsStagingDir
+                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
+                         * @instance
+                         */
+                        BigQuerySource.prototype.gcsStagingDir = "";
+    
+                        /**
+                         * BigQuerySource dataSchema.
+                         * @member {string} dataSchema
+                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
+                         * @instance
+                         */
+                        BigQuerySource.prototype.dataSchema = "";
+    
+                        // OneOf field names bound to virtual getters and setters
+                        var $oneOfFields;
+    
+                        /**
+                         * BigQuerySource partition.
+                         * @member {"partitionDate"|undefined} partition
+                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
+                         * @instance
+                         */
+                        Object.defineProperty(BigQuerySource.prototype, "partition", {
+                            get: $util.oneOfGetter($oneOfFields = ["partitionDate"]),
+                            set: $util.oneOfSetter($oneOfFields)
+                        });
+    
+                        /**
+                         * Creates a new BigQuerySource instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IUserInfo=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.UserInfo} UserInfo instance
+                         * @param {google.cloud.discoveryengine.v1.IBigQuerySource=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.BigQuerySource} BigQuerySource instance
                          */
-                        UserInfo.create = function create(properties) {
-                            return new UserInfo(properties);
+                        BigQuerySource.create = function create(properties) {
+                            return new BigQuerySource(properties);
                         };
     
                         /**
-                         * Encodes the specified UserInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.UserInfo.verify|verify} messages.
+                         * Encodes the specified BigQuerySource message. Does not implicitly {@link google.cloud.discoveryengine.v1.BigQuerySource.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IUserInfo} message UserInfo message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IBigQuerySource} message BigQuerySource message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        UserInfo.encode = function encode(message, writer) {
+                        BigQuerySource.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.userId != null && Object.hasOwnProperty.call(message, "userId"))
-                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.userId);
-                            if (message.userAgent != null && Object.hasOwnProperty.call(message, "userAgent"))
-                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.userAgent);
+                            if (message.projectId != null && Object.hasOwnProperty.call(message, "projectId"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.projectId);
+                            if (message.datasetId != null && Object.hasOwnProperty.call(message, "datasetId"))
+                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.datasetId);
+                            if (message.tableId != null && Object.hasOwnProperty.call(message, "tableId"))
+                                writer.uint32(/* id 3, wireType 2 =*/26).string(message.tableId);
+                            if (message.gcsStagingDir != null && Object.hasOwnProperty.call(message, "gcsStagingDir"))
+                                writer.uint32(/* id 4, wireType 2 =*/34).string(message.gcsStagingDir);
+                            if (message.partitionDate != null && Object.hasOwnProperty.call(message, "partitionDate"))
+                                $root.google.type.Date.encode(message.partitionDate, writer.uint32(/* id 5, wireType 2 =*/42).fork()).ldelim();
+                            if (message.dataSchema != null && Object.hasOwnProperty.call(message, "dataSchema"))
+                                writer.uint32(/* id 6, wireType 2 =*/50).string(message.dataSchema);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified UserInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.UserInfo.verify|verify} messages.
+                         * Encodes the specified BigQuerySource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.BigQuerySource.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IUserInfo} message UserInfo message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IBigQuerySource} message BigQuerySource message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        UserInfo.encodeDelimited = function encodeDelimited(message, writer) {
+                        BigQuerySource.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a UserInfo message from the specified reader or buffer.
+                         * Decodes a BigQuerySource message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.UserInfo} UserInfo
+                         * @returns {google.cloud.discoveryengine.v1.BigQuerySource} BigQuerySource
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        UserInfo.decode = function decode(reader, length) {
+                        BigQuerySource.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.UserInfo();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.BigQuerySource();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
+                                case 5: {
+                                        message.partitionDate = $root.google.type.Date.decode(reader, reader.uint32());
+                                        break;
+                                    }
                                 case 1: {
-                                        message.userId = reader.string();
+                                        message.projectId = reader.string();
                                         break;
                                     }
                                 case 2: {
-                                        message.userAgent = reader.string();
+                                        message.datasetId = reader.string();
+                                        break;
+                                    }
+                                case 3: {
+                                        message.tableId = reader.string();
+                                        break;
+                                    }
+                                case 4: {
+                                        message.gcsStagingDir = reader.string();
+                                        break;
+                                    }
+                                case 6: {
+                                        message.dataSchema = reader.string();
                                         break;
                                     }
                                 default:
@@ -5774,132 +9156,178 @@
                         };
     
                         /**
-                         * Decodes a UserInfo message from the specified reader or buffer, length delimited.
+                         * Decodes a BigQuerySource message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.UserInfo} UserInfo
+                         * @returns {google.cloud.discoveryengine.v1.BigQuerySource} BigQuerySource
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        UserInfo.decodeDelimited = function decodeDelimited(reader) {
+                        BigQuerySource.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a UserInfo message.
+                         * Verifies a BigQuerySource message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        UserInfo.verify = function verify(message) {
+                        BigQuerySource.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            if (message.userId != null && message.hasOwnProperty("userId"))
-                                if (!$util.isString(message.userId))
-                                    return "userId: string expected";
-                            if (message.userAgent != null && message.hasOwnProperty("userAgent"))
-                                if (!$util.isString(message.userAgent))
-                                    return "userAgent: string expected";
+                            var properties = {};
+                            if (message.partitionDate != null && message.hasOwnProperty("partitionDate")) {
+                                properties.partition = 1;
+                                {
+                                    var error = $root.google.type.Date.verify(message.partitionDate);
+                                    if (error)
+                                        return "partitionDate." + error;
+                                }
+                            }
+                            if (message.projectId != null && message.hasOwnProperty("projectId"))
+                                if (!$util.isString(message.projectId))
+                                    return "projectId: string expected";
+                            if (message.datasetId != null && message.hasOwnProperty("datasetId"))
+                                if (!$util.isString(message.datasetId))
+                                    return "datasetId: string expected";
+                            if (message.tableId != null && message.hasOwnProperty("tableId"))
+                                if (!$util.isString(message.tableId))
+                                    return "tableId: string expected";
+                            if (message.gcsStagingDir != null && message.hasOwnProperty("gcsStagingDir"))
+                                if (!$util.isString(message.gcsStagingDir))
+                                    return "gcsStagingDir: string expected";
+                            if (message.dataSchema != null && message.hasOwnProperty("dataSchema"))
+                                if (!$util.isString(message.dataSchema))
+                                    return "dataSchema: string expected";
                             return null;
                         };
     
                         /**
-                         * Creates a UserInfo message from a plain object. Also converts values to their respective internal types.
+                         * Creates a BigQuerySource message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.UserInfo} UserInfo
+                         * @returns {google.cloud.discoveryengine.v1.BigQuerySource} BigQuerySource
                          */
-                        UserInfo.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.UserInfo)
+                        BigQuerySource.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.BigQuerySource)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.UserInfo();
-                            if (object.userId != null)
-                                message.userId = String(object.userId);
-                            if (object.userAgent != null)
-                                message.userAgent = String(object.userAgent);
+                            var message = new $root.google.cloud.discoveryengine.v1.BigQuerySource();
+                            if (object.partitionDate != null) {
+                                if (typeof object.partitionDate !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.BigQuerySource.partitionDate: object expected");
+                                message.partitionDate = $root.google.type.Date.fromObject(object.partitionDate);
+                            }
+                            if (object.projectId != null)
+                                message.projectId = String(object.projectId);
+                            if (object.datasetId != null)
+                                message.datasetId = String(object.datasetId);
+                            if (object.tableId != null)
+                                message.tableId = String(object.tableId);
+                            if (object.gcsStagingDir != null)
+                                message.gcsStagingDir = String(object.gcsStagingDir);
+                            if (object.dataSchema != null)
+                                message.dataSchema = String(object.dataSchema);
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a UserInfo message. Also converts values to other types if specified.
+                         * Creates a plain object from a BigQuerySource message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.UserInfo} message UserInfo
+                         * @param {google.cloud.discoveryengine.v1.BigQuerySource} message BigQuerySource
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        UserInfo.toObject = function toObject(message, options) {
+                        BigQuerySource.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
                             if (options.defaults) {
-                                object.userId = "";
-                                object.userAgent = "";
+                                object.projectId = "";
+                                object.datasetId = "";
+                                object.tableId = "";
+                                object.gcsStagingDir = "";
+                                object.dataSchema = "";
+                            }
+                            if (message.projectId != null && message.hasOwnProperty("projectId"))
+                                object.projectId = message.projectId;
+                            if (message.datasetId != null && message.hasOwnProperty("datasetId"))
+                                object.datasetId = message.datasetId;
+                            if (message.tableId != null && message.hasOwnProperty("tableId"))
+                                object.tableId = message.tableId;
+                            if (message.gcsStagingDir != null && message.hasOwnProperty("gcsStagingDir"))
+                                object.gcsStagingDir = message.gcsStagingDir;
+                            if (message.partitionDate != null && message.hasOwnProperty("partitionDate")) {
+                                object.partitionDate = $root.google.type.Date.toObject(message.partitionDate, options);
+                                if (options.oneofs)
+                                    object.partition = "partitionDate";
                             }
-                            if (message.userId != null && message.hasOwnProperty("userId"))
-                                object.userId = message.userId;
-                            if (message.userAgent != null && message.hasOwnProperty("userAgent"))
-                                object.userAgent = message.userAgent;
+                            if (message.dataSchema != null && message.hasOwnProperty("dataSchema"))
+                                object.dataSchema = message.dataSchema;
                             return object;
                         };
     
                         /**
-                         * Converts this UserInfo to JSON.
+                         * Converts this BigQuerySource to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        UserInfo.prototype.toJSON = function toJSON() {
+                        BigQuerySource.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for UserInfo
+                         * Gets the default type url for BigQuerySource
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.UserInfo
+                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        UserInfo.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        BigQuerySource.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.UserInfo";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.BigQuerySource";
                         };
     
-                        return UserInfo;
+                        return BigQuerySource;
                     })();
     
-                    v1.SuggestionDenyListEntry = (function() {
+                    v1.SpannerSource = (function() {
     
                         /**
-                         * Properties of a SuggestionDenyListEntry.
+                         * Properties of a SpannerSource.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface ISuggestionDenyListEntry
-                         * @property {string|null} [blockPhrase] SuggestionDenyListEntry blockPhrase
-                         * @property {google.cloud.discoveryengine.v1.SuggestionDenyListEntry.MatchOperator|null} [matchOperator] SuggestionDenyListEntry matchOperator
+                         * @interface ISpannerSource
+                         * @property {string|null} [projectId] SpannerSource projectId
+                         * @property {string|null} [instanceId] SpannerSource instanceId
+                         * @property {string|null} [databaseId] SpannerSource databaseId
+                         * @property {string|null} [tableId] SpannerSource tableId
+                         * @property {boolean|null} [enableDataBoost] SpannerSource enableDataBoost
                          */
     
                         /**
-                         * Constructs a new SuggestionDenyListEntry.
+                         * Constructs a new SpannerSource.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a SuggestionDenyListEntry.
-                         * @implements ISuggestionDenyListEntry
+                         * @classdesc Represents a SpannerSource.
+                         * @implements ISpannerSource
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.ISuggestionDenyListEntry=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.ISpannerSource=} [properties] Properties to set
                          */
-                        function SuggestionDenyListEntry(properties) {
+                        function SpannerSource(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -5907,89 +9335,131 @@
                         }
     
                         /**
-                         * SuggestionDenyListEntry blockPhrase.
-                         * @member {string} blockPhrase
-                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * SpannerSource projectId.
+                         * @member {string} projectId
+                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
                          * @instance
                          */
-                        SuggestionDenyListEntry.prototype.blockPhrase = "";
+                        SpannerSource.prototype.projectId = "";
     
                         /**
-                         * SuggestionDenyListEntry matchOperator.
-                         * @member {google.cloud.discoveryengine.v1.SuggestionDenyListEntry.MatchOperator} matchOperator
-                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * SpannerSource instanceId.
+                         * @member {string} instanceId
+                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
                          * @instance
                          */
-                        SuggestionDenyListEntry.prototype.matchOperator = 0;
+                        SpannerSource.prototype.instanceId = "";
     
                         /**
-                         * Creates a new SuggestionDenyListEntry instance using the specified properties.
+                         * SpannerSource databaseId.
+                         * @member {string} databaseId
+                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
+                         * @instance
+                         */
+                        SpannerSource.prototype.databaseId = "";
+    
+                        /**
+                         * SpannerSource tableId.
+                         * @member {string} tableId
+                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
+                         * @instance
+                         */
+                        SpannerSource.prototype.tableId = "";
+    
+                        /**
+                         * SpannerSource enableDataBoost.
+                         * @member {boolean} enableDataBoost
+                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
+                         * @instance
+                         */
+                        SpannerSource.prototype.enableDataBoost = false;
+    
+                        /**
+                         * Creates a new SpannerSource instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ISuggestionDenyListEntry=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.SuggestionDenyListEntry} SuggestionDenyListEntry instance
+                         * @param {google.cloud.discoveryengine.v1.ISpannerSource=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.SpannerSource} SpannerSource instance
                          */
-                        SuggestionDenyListEntry.create = function create(properties) {
-                            return new SuggestionDenyListEntry(properties);
+                        SpannerSource.create = function create(properties) {
+                            return new SpannerSource(properties);
                         };
     
                         /**
-                         * Encodes the specified SuggestionDenyListEntry message. Does not implicitly {@link google.cloud.discoveryengine.v1.SuggestionDenyListEntry.verify|verify} messages.
+                         * Encodes the specified SpannerSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.SpannerSource.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ISuggestionDenyListEntry} message SuggestionDenyListEntry message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.ISpannerSource} message SpannerSource message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        SuggestionDenyListEntry.encode = function encode(message, writer) {
+                        SpannerSource.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.blockPhrase != null && Object.hasOwnProperty.call(message, "blockPhrase"))
-                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.blockPhrase);
-                            if (message.matchOperator != null && Object.hasOwnProperty.call(message, "matchOperator"))
-                                writer.uint32(/* id 2, wireType 0 =*/16).int32(message.matchOperator);
+                            if (message.projectId != null && Object.hasOwnProperty.call(message, "projectId"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.projectId);
+                            if (message.instanceId != null && Object.hasOwnProperty.call(message, "instanceId"))
+                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.instanceId);
+                            if (message.databaseId != null && Object.hasOwnProperty.call(message, "databaseId"))
+                                writer.uint32(/* id 3, wireType 2 =*/26).string(message.databaseId);
+                            if (message.tableId != null && Object.hasOwnProperty.call(message, "tableId"))
+                                writer.uint32(/* id 4, wireType 2 =*/34).string(message.tableId);
+                            if (message.enableDataBoost != null && Object.hasOwnProperty.call(message, "enableDataBoost"))
+                                writer.uint32(/* id 5, wireType 0 =*/40).bool(message.enableDataBoost);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified SuggestionDenyListEntry message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.SuggestionDenyListEntry.verify|verify} messages.
+                         * Encodes the specified SpannerSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.SpannerSource.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ISuggestionDenyListEntry} message SuggestionDenyListEntry message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.ISpannerSource} message SpannerSource message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        SuggestionDenyListEntry.encodeDelimited = function encodeDelimited(message, writer) {
+                        SpannerSource.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a SuggestionDenyListEntry message from the specified reader or buffer.
+                         * Decodes a SpannerSource message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.SuggestionDenyListEntry} SuggestionDenyListEntry
+                         * @returns {google.cloud.discoveryengine.v1.SpannerSource} SpannerSource
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        SuggestionDenyListEntry.decode = function decode(reader, length) {
+                        SpannerSource.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.SuggestionDenyListEntry();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.SpannerSource();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 1: {
-                                        message.blockPhrase = reader.string();
+                                        message.projectId = reader.string();
                                         break;
                                     }
                                 case 2: {
-                                        message.matchOperator = reader.int32();
+                                        message.instanceId = reader.string();
+                                        break;
+                                    }
+                                case 3: {
+                                        message.databaseId = reader.string();
+                                        break;
+                                    }
+                                case 4: {
+                                        message.tableId = reader.string();
+                                        break;
+                                    }
+                                case 5: {
+                                        message.enableDataBoost = reader.bool();
                                         break;
                                     }
                                 default:
@@ -6001,309 +9471,157 @@
                         };
     
                         /**
-                         * Decodes a SuggestionDenyListEntry message from the specified reader or buffer, length delimited.
+                         * Decodes a SpannerSource message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.SuggestionDenyListEntry} SuggestionDenyListEntry
+                         * @returns {google.cloud.discoveryengine.v1.SpannerSource} SpannerSource
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        SuggestionDenyListEntry.decodeDelimited = function decodeDelimited(reader) {
+                        SpannerSource.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a SuggestionDenyListEntry message.
+                         * Verifies a SpannerSource message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        SuggestionDenyListEntry.verify = function verify(message) {
+                        SpannerSource.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            if (message.blockPhrase != null && message.hasOwnProperty("blockPhrase"))
-                                if (!$util.isString(message.blockPhrase))
-                                    return "blockPhrase: string expected";
-                            if (message.matchOperator != null && message.hasOwnProperty("matchOperator"))
-                                switch (message.matchOperator) {
-                                default:
-                                    return "matchOperator: enum value expected";
-                                case 0:
-                                case 1:
-                                case 2:
-                                    break;
-                                }
+                            if (message.projectId != null && message.hasOwnProperty("projectId"))
+                                if (!$util.isString(message.projectId))
+                                    return "projectId: string expected";
+                            if (message.instanceId != null && message.hasOwnProperty("instanceId"))
+                                if (!$util.isString(message.instanceId))
+                                    return "instanceId: string expected";
+                            if (message.databaseId != null && message.hasOwnProperty("databaseId"))
+                                if (!$util.isString(message.databaseId))
+                                    return "databaseId: string expected";
+                            if (message.tableId != null && message.hasOwnProperty("tableId"))
+                                if (!$util.isString(message.tableId))
+                                    return "tableId: string expected";
+                            if (message.enableDataBoost != null && message.hasOwnProperty("enableDataBoost"))
+                                if (typeof message.enableDataBoost !== "boolean")
+                                    return "enableDataBoost: boolean expected";
                             return null;
                         };
     
                         /**
-                         * Creates a SuggestionDenyListEntry message from a plain object. Also converts values to their respective internal types.
+                         * Creates a SpannerSource message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.SuggestionDenyListEntry} SuggestionDenyListEntry
+                         * @returns {google.cloud.discoveryengine.v1.SpannerSource} SpannerSource
                          */
-                        SuggestionDenyListEntry.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.SuggestionDenyListEntry)
+                        SpannerSource.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.SpannerSource)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.SuggestionDenyListEntry();
-                            if (object.blockPhrase != null)
-                                message.blockPhrase = String(object.blockPhrase);
-                            switch (object.matchOperator) {
-                            default:
-                                if (typeof object.matchOperator === "number") {
-                                    message.matchOperator = object.matchOperator;
-                                    break;
-                                }
-                                break;
-                            case "MATCH_OPERATOR_UNSPECIFIED":
-                            case 0:
-                                message.matchOperator = 0;
-                                break;
-                            case "EXACT_MATCH":
-                            case 1:
-                                message.matchOperator = 1;
-                                break;
-                            case "CONTAINS":
-                            case 2:
-                                message.matchOperator = 2;
-                                break;
-                            }
+                            var message = new $root.google.cloud.discoveryengine.v1.SpannerSource();
+                            if (object.projectId != null)
+                                message.projectId = String(object.projectId);
+                            if (object.instanceId != null)
+                                message.instanceId = String(object.instanceId);
+                            if (object.databaseId != null)
+                                message.databaseId = String(object.databaseId);
+                            if (object.tableId != null)
+                                message.tableId = String(object.tableId);
+                            if (object.enableDataBoost != null)
+                                message.enableDataBoost = Boolean(object.enableDataBoost);
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a SuggestionDenyListEntry message. Also converts values to other types if specified.
+                         * Creates a plain object from a SpannerSource message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.SuggestionDenyListEntry} message SuggestionDenyListEntry
+                         * @param {google.cloud.discoveryengine.v1.SpannerSource} message SpannerSource
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        SuggestionDenyListEntry.toObject = function toObject(message, options) {
+                        SpannerSource.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
                             if (options.defaults) {
-                                object.blockPhrase = "";
-                                object.matchOperator = options.enums === String ? "MATCH_OPERATOR_UNSPECIFIED" : 0;
+                                object.projectId = "";
+                                object.instanceId = "";
+                                object.databaseId = "";
+                                object.tableId = "";
+                                object.enableDataBoost = false;
                             }
-                            if (message.blockPhrase != null && message.hasOwnProperty("blockPhrase"))
-                                object.blockPhrase = message.blockPhrase;
-                            if (message.matchOperator != null && message.hasOwnProperty("matchOperator"))
-                                object.matchOperator = options.enums === String ? $root.google.cloud.discoveryengine.v1.SuggestionDenyListEntry.MatchOperator[message.matchOperator] === undefined ? message.matchOperator : $root.google.cloud.discoveryengine.v1.SuggestionDenyListEntry.MatchOperator[message.matchOperator] : message.matchOperator;
+                            if (message.projectId != null && message.hasOwnProperty("projectId"))
+                                object.projectId = message.projectId;
+                            if (message.instanceId != null && message.hasOwnProperty("instanceId"))
+                                object.instanceId = message.instanceId;
+                            if (message.databaseId != null && message.hasOwnProperty("databaseId"))
+                                object.databaseId = message.databaseId;
+                            if (message.tableId != null && message.hasOwnProperty("tableId"))
+                                object.tableId = message.tableId;
+                            if (message.enableDataBoost != null && message.hasOwnProperty("enableDataBoost"))
+                                object.enableDataBoost = message.enableDataBoost;
                             return object;
                         };
     
                         /**
-                         * Converts this SuggestionDenyListEntry to JSON.
+                         * Converts this SpannerSource to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        SuggestionDenyListEntry.prototype.toJSON = function toJSON() {
+                        SpannerSource.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for SuggestionDenyListEntry
+                         * Gets the default type url for SpannerSource
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.SuggestionDenyListEntry
+                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        SuggestionDenyListEntry.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        SpannerSource.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.SuggestionDenyListEntry";
-                        };
-    
-                        /**
-                         * MatchOperator enum.
-                         * @name google.cloud.discoveryengine.v1.SuggestionDenyListEntry.MatchOperator
-                         * @enum {number}
-                         * @property {number} MATCH_OPERATOR_UNSPECIFIED=0 MATCH_OPERATOR_UNSPECIFIED value
-                         * @property {number} EXACT_MATCH=1 EXACT_MATCH value
-                         * @property {number} CONTAINS=2 CONTAINS value
-                         */
-                        SuggestionDenyListEntry.MatchOperator = (function() {
-                            var valuesById = {}, values = Object.create(valuesById);
-                            values[valuesById[0] = "MATCH_OPERATOR_UNSPECIFIED"] = 0;
-                            values[valuesById[1] = "EXACT_MATCH"] = 1;
-                            values[valuesById[2] = "CONTAINS"] = 2;
-                            return values;
-                        })();
-    
-                        return SuggestionDenyListEntry;
-                    })();
-    
-                    v1.CompletionService = (function() {
-    
-                        /**
-                         * Constructs a new CompletionService service.
-                         * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a CompletionService
-                         * @extends $protobuf.rpc.Service
-                         * @constructor
-                         * @param {$protobuf.RPCImpl} rpcImpl RPC implementation
-                         * @param {boolean} [requestDelimited=false] Whether requests are length-delimited
-                         * @param {boolean} [responseDelimited=false] Whether responses are length-delimited
-                         */
-                        function CompletionService(rpcImpl, requestDelimited, responseDelimited) {
-                            $protobuf.rpc.Service.call(this, rpcImpl, requestDelimited, responseDelimited);
-                        }
-    
-                        (CompletionService.prototype = Object.create($protobuf.rpc.Service.prototype)).constructor = CompletionService;
-    
-                        /**
-                         * Creates new CompletionService service using the specified rpc implementation.
-                         * @function create
-                         * @memberof google.cloud.discoveryengine.v1.CompletionService
-                         * @static
-                         * @param {$protobuf.RPCImpl} rpcImpl RPC implementation
-                         * @param {boolean} [requestDelimited=false] Whether requests are length-delimited
-                         * @param {boolean} [responseDelimited=false] Whether responses are length-delimited
-                         * @returns {CompletionService} RPC service. Useful where requests and/or responses are streamed.
-                         */
-                        CompletionService.create = function create(rpcImpl, requestDelimited, responseDelimited) {
-                            return new this(rpcImpl, requestDelimited, responseDelimited);
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.SpannerSource";
                         };
     
-                        /**
-                         * Callback as used by {@link google.cloud.discoveryengine.v1.CompletionService|completeQuery}.
-                         * @memberof google.cloud.discoveryengine.v1.CompletionService
-                         * @typedef CompleteQueryCallback
-                         * @type {function}
-                         * @param {Error|null} error Error, if any
-                         * @param {google.cloud.discoveryengine.v1.CompleteQueryResponse} [response] CompleteQueryResponse
-                         */
-    
-                        /**
-                         * Calls CompleteQuery.
-                         * @function completeQuery
-                         * @memberof google.cloud.discoveryengine.v1.CompletionService
-                         * @instance
-                         * @param {google.cloud.discoveryengine.v1.ICompleteQueryRequest} request CompleteQueryRequest message or plain object
-                         * @param {google.cloud.discoveryengine.v1.CompletionService.CompleteQueryCallback} callback Node-style callback called with the error, if any, and CompleteQueryResponse
-                         * @returns {undefined}
-                         * @variation 1
-                         */
-                        Object.defineProperty(CompletionService.prototype.completeQuery = function completeQuery(request, callback) {
-                            return this.rpcCall(completeQuery, $root.google.cloud.discoveryengine.v1.CompleteQueryRequest, $root.google.cloud.discoveryengine.v1.CompleteQueryResponse, request, callback);
-                        }, "name", { value: "CompleteQuery" });
-    
-                        /**
-                         * Calls CompleteQuery.
-                         * @function completeQuery
-                         * @memberof google.cloud.discoveryengine.v1.CompletionService
-                         * @instance
-                         * @param {google.cloud.discoveryengine.v1.ICompleteQueryRequest} request CompleteQueryRequest message or plain object
-                         * @returns {Promise<google.cloud.discoveryengine.v1.CompleteQueryResponse>} Promise
-                         * @variation 2
-                         */
-    
-                        /**
-                         * Callback as used by {@link google.cloud.discoveryengine.v1.CompletionService|importSuggestionDenyListEntries}.
-                         * @memberof google.cloud.discoveryengine.v1.CompletionService
-                         * @typedef ImportSuggestionDenyListEntriesCallback
-                         * @type {function}
-                         * @param {Error|null} error Error, if any
-                         * @param {google.longrunning.Operation} [response] Operation
-                         */
-    
-                        /**
-                         * Calls ImportSuggestionDenyListEntries.
-                         * @function importSuggestionDenyListEntries
-                         * @memberof google.cloud.discoveryengine.v1.CompletionService
-                         * @instance
-                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesRequest} request ImportSuggestionDenyListEntriesRequest message or plain object
-                         * @param {google.cloud.discoveryengine.v1.CompletionService.ImportSuggestionDenyListEntriesCallback} callback Node-style callback called with the error, if any, and Operation
-                         * @returns {undefined}
-                         * @variation 1
-                         */
-                        Object.defineProperty(CompletionService.prototype.importSuggestionDenyListEntries = function importSuggestionDenyListEntries(request, callback) {
-                            return this.rpcCall(importSuggestionDenyListEntries, $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest, $root.google.longrunning.Operation, request, callback);
-                        }, "name", { value: "ImportSuggestionDenyListEntries" });
-    
-                        /**
-                         * Calls ImportSuggestionDenyListEntries.
-                         * @function importSuggestionDenyListEntries
-                         * @memberof google.cloud.discoveryengine.v1.CompletionService
-                         * @instance
-                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesRequest} request ImportSuggestionDenyListEntriesRequest message or plain object
-                         * @returns {Promise<google.longrunning.Operation>} Promise
-                         * @variation 2
-                         */
-    
-                        /**
-                         * Callback as used by {@link google.cloud.discoveryengine.v1.CompletionService|purgeSuggestionDenyListEntries}.
-                         * @memberof google.cloud.discoveryengine.v1.CompletionService
-                         * @typedef PurgeSuggestionDenyListEntriesCallback
-                         * @type {function}
-                         * @param {Error|null} error Error, if any
-                         * @param {google.longrunning.Operation} [response] Operation
-                         */
-    
-                        /**
-                         * Calls PurgeSuggestionDenyListEntries.
-                         * @function purgeSuggestionDenyListEntries
-                         * @memberof google.cloud.discoveryengine.v1.CompletionService
-                         * @instance
-                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesRequest} request PurgeSuggestionDenyListEntriesRequest message or plain object
-                         * @param {google.cloud.discoveryengine.v1.CompletionService.PurgeSuggestionDenyListEntriesCallback} callback Node-style callback called with the error, if any, and Operation
-                         * @returns {undefined}
-                         * @variation 1
-                         */
-                        Object.defineProperty(CompletionService.prototype.purgeSuggestionDenyListEntries = function purgeSuggestionDenyListEntries(request, callback) {
-                            return this.rpcCall(purgeSuggestionDenyListEntries, $root.google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest, $root.google.longrunning.Operation, request, callback);
-                        }, "name", { value: "PurgeSuggestionDenyListEntries" });
-    
-                        /**
-                         * Calls PurgeSuggestionDenyListEntries.
-                         * @function purgeSuggestionDenyListEntries
-                         * @memberof google.cloud.discoveryengine.v1.CompletionService
-                         * @instance
-                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesRequest} request PurgeSuggestionDenyListEntriesRequest message or plain object
-                         * @returns {Promise<google.longrunning.Operation>} Promise
-                         * @variation 2
-                         */
-    
-                        return CompletionService;
+                        return SpannerSource;
                     })();
     
-                    v1.CompleteQueryRequest = (function() {
+                    v1.BigtableOptions = (function() {
     
                         /**
-                         * Properties of a CompleteQueryRequest.
+                         * Properties of a BigtableOptions.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface ICompleteQueryRequest
-                         * @property {string|null} [dataStore] CompleteQueryRequest dataStore
-                         * @property {string|null} [query] CompleteQueryRequest query
-                         * @property {string|null} [queryModel] CompleteQueryRequest queryModel
-                         * @property {string|null} [userPseudoId] CompleteQueryRequest userPseudoId
-                         * @property {boolean|null} [includeTailSuggestions] CompleteQueryRequest includeTailSuggestions
+                         * @interface IBigtableOptions
+                         * @property {string|null} [keyFieldName] BigtableOptions keyFieldName
+                         * @property {Object.<string,google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumnFamily>|null} [families] BigtableOptions families
                          */
     
                         /**
-                         * Constructs a new CompleteQueryRequest.
+                         * Constructs a new BigtableOptions.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a CompleteQueryRequest.
-                         * @implements ICompleteQueryRequest
+                         * @classdesc Represents a BigtableOptions.
+                         * @implements IBigtableOptions
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.ICompleteQueryRequest=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IBigtableOptions=} [properties] Properties to set
                          */
-                        function CompleteQueryRequest(properties) {
+                        function BigtableOptions(properties) {
+                            this.families = {};
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -6311,131 +9629,111 @@
                         }
     
                         /**
-                         * CompleteQueryRequest dataStore.
-                         * @member {string} dataStore
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
-                         * @instance
-                         */
-                        CompleteQueryRequest.prototype.dataStore = "";
-    
-                        /**
-                         * CompleteQueryRequest query.
-                         * @member {string} query
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
-                         * @instance
-                         */
-                        CompleteQueryRequest.prototype.query = "";
-    
-                        /**
-                         * CompleteQueryRequest queryModel.
-                         * @member {string} queryModel
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
-                         * @instance
-                         */
-                        CompleteQueryRequest.prototype.queryModel = "";
-    
-                        /**
-                         * CompleteQueryRequest userPseudoId.
-                         * @member {string} userPseudoId
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * BigtableOptions keyFieldName.
+                         * @member {string} keyFieldName
+                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
                          * @instance
                          */
-                        CompleteQueryRequest.prototype.userPseudoId = "";
+                        BigtableOptions.prototype.keyFieldName = "";
     
                         /**
-                         * CompleteQueryRequest includeTailSuggestions.
-                         * @member {boolean} includeTailSuggestions
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * BigtableOptions families.
+                         * @member {Object.<string,google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumnFamily>} families
+                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
                          * @instance
                          */
-                        CompleteQueryRequest.prototype.includeTailSuggestions = false;
+                        BigtableOptions.prototype.families = $util.emptyObject;
     
                         /**
-                         * Creates a new CompleteQueryRequest instance using the specified properties.
+                         * Creates a new BigtableOptions instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ICompleteQueryRequest=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.CompleteQueryRequest} CompleteQueryRequest instance
+                         * @param {google.cloud.discoveryengine.v1.IBigtableOptions=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.BigtableOptions} BigtableOptions instance
                          */
-                        CompleteQueryRequest.create = function create(properties) {
-                            return new CompleteQueryRequest(properties);
+                        BigtableOptions.create = function create(properties) {
+                            return new BigtableOptions(properties);
                         };
     
                         /**
-                         * Encodes the specified CompleteQueryRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.CompleteQueryRequest.verify|verify} messages.
+                         * Encodes the specified BigtableOptions message. Does not implicitly {@link google.cloud.discoveryengine.v1.BigtableOptions.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ICompleteQueryRequest} message CompleteQueryRequest message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IBigtableOptions} message BigtableOptions message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        CompleteQueryRequest.encode = function encode(message, writer) {
+                        BigtableOptions.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.dataStore != null && Object.hasOwnProperty.call(message, "dataStore"))
-                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.dataStore);
-                            if (message.query != null && Object.hasOwnProperty.call(message, "query"))
-                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.query);
-                            if (message.queryModel != null && Object.hasOwnProperty.call(message, "queryModel"))
-                                writer.uint32(/* id 3, wireType 2 =*/26).string(message.queryModel);
-                            if (message.userPseudoId != null && Object.hasOwnProperty.call(message, "userPseudoId"))
-                                writer.uint32(/* id 4, wireType 2 =*/34).string(message.userPseudoId);
-                            if (message.includeTailSuggestions != null && Object.hasOwnProperty.call(message, "includeTailSuggestions"))
-                                writer.uint32(/* id 5, wireType 0 =*/40).bool(message.includeTailSuggestions);
+                            if (message.keyFieldName != null && Object.hasOwnProperty.call(message, "keyFieldName"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.keyFieldName);
+                            if (message.families != null && Object.hasOwnProperty.call(message, "families"))
+                                for (var keys = Object.keys(message.families), i = 0; i < keys.length; ++i) {
+                                    writer.uint32(/* id 2, wireType 2 =*/18).fork().uint32(/* id 1, wireType 2 =*/10).string(keys[i]);
+                                    $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily.encode(message.families[keys[i]], writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim().ldelim();
+                                }
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified CompleteQueryRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.CompleteQueryRequest.verify|verify} messages.
+                         * Encodes the specified BigtableOptions message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.BigtableOptions.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ICompleteQueryRequest} message CompleteQueryRequest message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IBigtableOptions} message BigtableOptions message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        CompleteQueryRequest.encodeDelimited = function encodeDelimited(message, writer) {
+                        BigtableOptions.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a CompleteQueryRequest message from the specified reader or buffer.
+                         * Decodes a BigtableOptions message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.CompleteQueryRequest} CompleteQueryRequest
+                         * @returns {google.cloud.discoveryengine.v1.BigtableOptions} BigtableOptions
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        CompleteQueryRequest.decode = function decode(reader, length) {
+                        BigtableOptions.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.CompleteQueryRequest();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.BigtableOptions(), key, value;
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 1: {
-                                        message.dataStore = reader.string();
+                                        message.keyFieldName = reader.string();
                                         break;
                                     }
                                 case 2: {
-                                        message.query = reader.string();
-                                        break;
-                                    }
-                                case 3: {
-                                        message.queryModel = reader.string();
-                                        break;
-                                    }
-                                case 4: {
-                                        message.userPseudoId = reader.string();
-                                        break;
-                                    }
-                                case 5: {
-                                        message.includeTailSuggestions = reader.bool();
+                                        if (message.families === $util.emptyObject)
+                                            message.families = {};
+                                        var end2 = reader.uint32() + reader.pos;
+                                        key = "";
+                                        value = null;
+                                        while (reader.pos < end2) {
+                                            var tag2 = reader.uint32();
+                                            switch (tag2 >>> 3) {
+                                            case 1:
+                                                key = reader.string();
+                                                break;
+                                            case 2:
+                                                value = $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily.decode(reader, reader.uint32());
+                                                break;
+                                            default:
+                                                reader.skipType(tag2 & 7);
+                                                break;
+                                            }
+                                        }
+                                        message.families[key] = value;
                                         break;
                                     }
                                 default:
@@ -6447,402 +9745,518 @@
                         };
     
                         /**
-                         * Decodes a CompleteQueryRequest message from the specified reader or buffer, length delimited.
+                         * Decodes a BigtableOptions message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.CompleteQueryRequest} CompleteQueryRequest
+                         * @returns {google.cloud.discoveryengine.v1.BigtableOptions} BigtableOptions
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        CompleteQueryRequest.decodeDelimited = function decodeDelimited(reader) {
+                        BigtableOptions.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a CompleteQueryRequest message.
+                         * Verifies a BigtableOptions message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        CompleteQueryRequest.verify = function verify(message) {
+                        BigtableOptions.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            if (message.dataStore != null && message.hasOwnProperty("dataStore"))
-                                if (!$util.isString(message.dataStore))
-                                    return "dataStore: string expected";
-                            if (message.query != null && message.hasOwnProperty("query"))
-                                if (!$util.isString(message.query))
-                                    return "query: string expected";
-                            if (message.queryModel != null && message.hasOwnProperty("queryModel"))
-                                if (!$util.isString(message.queryModel))
-                                    return "queryModel: string expected";
-                            if (message.userPseudoId != null && message.hasOwnProperty("userPseudoId"))
-                                if (!$util.isString(message.userPseudoId))
-                                    return "userPseudoId: string expected";
-                            if (message.includeTailSuggestions != null && message.hasOwnProperty("includeTailSuggestions"))
-                                if (typeof message.includeTailSuggestions !== "boolean")
-                                    return "includeTailSuggestions: boolean expected";
+                            if (message.keyFieldName != null && message.hasOwnProperty("keyFieldName"))
+                                if (!$util.isString(message.keyFieldName))
+                                    return "keyFieldName: string expected";
+                            if (message.families != null && message.hasOwnProperty("families")) {
+                                if (!$util.isObject(message.families))
+                                    return "families: object expected";
+                                var key = Object.keys(message.families);
+                                for (var i = 0; i < key.length; ++i) {
+                                    var error = $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily.verify(message.families[key[i]]);
+                                    if (error)
+                                        return "families." + error;
+                                }
+                            }
                             return null;
                         };
     
                         /**
-                         * Creates a CompleteQueryRequest message from a plain object. Also converts values to their respective internal types.
+                         * Creates a BigtableOptions message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.CompleteQueryRequest} CompleteQueryRequest
+                         * @returns {google.cloud.discoveryengine.v1.BigtableOptions} BigtableOptions
                          */
-                        CompleteQueryRequest.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.CompleteQueryRequest)
+                        BigtableOptions.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.BigtableOptions)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.CompleteQueryRequest();
-                            if (object.dataStore != null)
-                                message.dataStore = String(object.dataStore);
-                            if (object.query != null)
-                                message.query = String(object.query);
-                            if (object.queryModel != null)
-                                message.queryModel = String(object.queryModel);
-                            if (object.userPseudoId != null)
-                                message.userPseudoId = String(object.userPseudoId);
-                            if (object.includeTailSuggestions != null)
-                                message.includeTailSuggestions = Boolean(object.includeTailSuggestions);
+                            var message = new $root.google.cloud.discoveryengine.v1.BigtableOptions();
+                            if (object.keyFieldName != null)
+                                message.keyFieldName = String(object.keyFieldName);
+                            if (object.families) {
+                                if (typeof object.families !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.BigtableOptions.families: object expected");
+                                message.families = {};
+                                for (var keys = Object.keys(object.families), i = 0; i < keys.length; ++i) {
+                                    if (typeof object.families[keys[i]] !== "object")
+                                        throw TypeError(".google.cloud.discoveryengine.v1.BigtableOptions.families: object expected");
+                                    message.families[keys[i]] = $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily.fromObject(object.families[keys[i]]);
+                                }
+                            }
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a CompleteQueryRequest message. Also converts values to other types if specified.
+                         * Creates a plain object from a BigtableOptions message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.CompleteQueryRequest} message CompleteQueryRequest
+                         * @param {google.cloud.discoveryengine.v1.BigtableOptions} message BigtableOptions
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        CompleteQueryRequest.toObject = function toObject(message, options) {
+                        BigtableOptions.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
-                            if (options.defaults) {
-                                object.dataStore = "";
-                                object.query = "";
-                                object.queryModel = "";
-                                object.userPseudoId = "";
-                                object.includeTailSuggestions = false;
+                            if (options.objects || options.defaults)
+                                object.families = {};
+                            if (options.defaults)
+                                object.keyFieldName = "";
+                            if (message.keyFieldName != null && message.hasOwnProperty("keyFieldName"))
+                                object.keyFieldName = message.keyFieldName;
+                            var keys2;
+                            if (message.families && (keys2 = Object.keys(message.families)).length) {
+                                object.families = {};
+                                for (var j = 0; j < keys2.length; ++j)
+                                    object.families[keys2[j]] = $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily.toObject(message.families[keys2[j]], options);
                             }
-                            if (message.dataStore != null && message.hasOwnProperty("dataStore"))
-                                object.dataStore = message.dataStore;
-                            if (message.query != null && message.hasOwnProperty("query"))
-                                object.query = message.query;
-                            if (message.queryModel != null && message.hasOwnProperty("queryModel"))
-                                object.queryModel = message.queryModel;
-                            if (message.userPseudoId != null && message.hasOwnProperty("userPseudoId"))
-                                object.userPseudoId = message.userPseudoId;
-                            if (message.includeTailSuggestions != null && message.hasOwnProperty("includeTailSuggestions"))
-                                object.includeTailSuggestions = message.includeTailSuggestions;
                             return object;
                         };
     
                         /**
-                         * Converts this CompleteQueryRequest to JSON.
+                         * Converts this BigtableOptions to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        CompleteQueryRequest.prototype.toJSON = function toJSON() {
+                        BigtableOptions.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for CompleteQueryRequest
+                         * Gets the default type url for BigtableOptions
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryRequest
+                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        CompleteQueryRequest.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        BigtableOptions.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.CompleteQueryRequest";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.BigtableOptions";
                         };
     
-                        return CompleteQueryRequest;
-                    })();
+                        BigtableOptions.BigtableColumnFamily = (function() {
     
-                    v1.CompleteQueryResponse = (function() {
+                            /**
+                             * Properties of a BigtableColumnFamily.
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions
+                             * @interface IBigtableColumnFamily
+                             * @property {string|null} [fieldName] BigtableColumnFamily fieldName
+                             * @property {google.cloud.discoveryengine.v1.BigtableOptions.Encoding|null} [encoding] BigtableColumnFamily encoding
+                             * @property {google.cloud.discoveryengine.v1.BigtableOptions.Type|null} [type] BigtableColumnFamily type
+                             * @property {Array.<google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumn>|null} [columns] BigtableColumnFamily columns
+                             */
     
-                        /**
-                         * Properties of a CompleteQueryResponse.
-                         * @memberof google.cloud.discoveryengine.v1
-                         * @interface ICompleteQueryResponse
-                         * @property {Array.<google.cloud.discoveryengine.v1.CompleteQueryResponse.IQuerySuggestion>|null} [querySuggestions] CompleteQueryResponse querySuggestions
-                         * @property {boolean|null} [tailMatchTriggered] CompleteQueryResponse tailMatchTriggered
-                         */
+                            /**
+                             * Constructs a new BigtableColumnFamily.
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions
+                             * @classdesc Represents a BigtableColumnFamily.
+                             * @implements IBigtableColumnFamily
+                             * @constructor
+                             * @param {google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumnFamily=} [properties] Properties to set
+                             */
+                            function BigtableColumnFamily(properties) {
+                                this.columns = [];
+                                if (properties)
+                                    for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                        if (properties[keys[i]] != null)
+                                            this[keys[i]] = properties[keys[i]];
+                            }
     
-                        /**
-                         * Constructs a new CompleteQueryResponse.
-                         * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a CompleteQueryResponse.
-                         * @implements ICompleteQueryResponse
-                         * @constructor
-                         * @param {google.cloud.discoveryengine.v1.ICompleteQueryResponse=} [properties] Properties to set
-                         */
-                        function CompleteQueryResponse(properties) {
-                            this.querySuggestions = [];
-                            if (properties)
-                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
-                                    if (properties[keys[i]] != null)
-                                        this[keys[i]] = properties[keys[i]];
-                        }
+                            /**
+                             * BigtableColumnFamily fieldName.
+                             * @member {string} fieldName
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
+                             * @instance
+                             */
+                            BigtableColumnFamily.prototype.fieldName = "";
     
-                        /**
-                         * CompleteQueryResponse querySuggestions.
-                         * @member {Array.<google.cloud.discoveryengine.v1.CompleteQueryResponse.IQuerySuggestion>} querySuggestions
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
-                         * @instance
-                         */
-                        CompleteQueryResponse.prototype.querySuggestions = $util.emptyArray;
+                            /**
+                             * BigtableColumnFamily encoding.
+                             * @member {google.cloud.discoveryengine.v1.BigtableOptions.Encoding} encoding
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
+                             * @instance
+                             */
+                            BigtableColumnFamily.prototype.encoding = 0;
     
-                        /**
-                         * CompleteQueryResponse tailMatchTriggered.
-                         * @member {boolean} tailMatchTriggered
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
-                         * @instance
-                         */
-                        CompleteQueryResponse.prototype.tailMatchTriggered = false;
+                            /**
+                             * BigtableColumnFamily type.
+                             * @member {google.cloud.discoveryengine.v1.BigtableOptions.Type} type
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
+                             * @instance
+                             */
+                            BigtableColumnFamily.prototype.type = 0;
     
-                        /**
-                         * Creates a new CompleteQueryResponse instance using the specified properties.
-                         * @function create
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
-                         * @static
-                         * @param {google.cloud.discoveryengine.v1.ICompleteQueryResponse=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.CompleteQueryResponse} CompleteQueryResponse instance
-                         */
-                        CompleteQueryResponse.create = function create(properties) {
-                            return new CompleteQueryResponse(properties);
-                        };
+                            /**
+                             * BigtableColumnFamily columns.
+                             * @member {Array.<google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumn>} columns
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
+                             * @instance
+                             */
+                            BigtableColumnFamily.prototype.columns = $util.emptyArray;
     
-                        /**
-                         * Encodes the specified CompleteQueryResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.CompleteQueryResponse.verify|verify} messages.
-                         * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
-                         * @static
-                         * @param {google.cloud.discoveryengine.v1.ICompleteQueryResponse} message CompleteQueryResponse message or plain object to encode
-                         * @param {$protobuf.Writer} [writer] Writer to encode to
-                         * @returns {$protobuf.Writer} Writer
-                         */
-                        CompleteQueryResponse.encode = function encode(message, writer) {
-                            if (!writer)
-                                writer = $Writer.create();
-                            if (message.querySuggestions != null && message.querySuggestions.length)
-                                for (var i = 0; i < message.querySuggestions.length; ++i)
-                                    $root.google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion.encode(message.querySuggestions[i], writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
-                            if (message.tailMatchTriggered != null && Object.hasOwnProperty.call(message, "tailMatchTriggered"))
-                                writer.uint32(/* id 2, wireType 0 =*/16).bool(message.tailMatchTriggered);
-                            return writer;
-                        };
+                            /**
+                             * Creates a new BigtableColumnFamily instance using the specified properties.
+                             * @function create
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumnFamily=} [properties] Properties to set
+                             * @returns {google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily} BigtableColumnFamily instance
+                             */
+                            BigtableColumnFamily.create = function create(properties) {
+                                return new BigtableColumnFamily(properties);
+                            };
     
-                        /**
-                         * Encodes the specified CompleteQueryResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.CompleteQueryResponse.verify|verify} messages.
-                         * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
-                         * @static
-                         * @param {google.cloud.discoveryengine.v1.ICompleteQueryResponse} message CompleteQueryResponse message or plain object to encode
-                         * @param {$protobuf.Writer} [writer] Writer to encode to
-                         * @returns {$protobuf.Writer} Writer
-                         */
-                        CompleteQueryResponse.encodeDelimited = function encodeDelimited(message, writer) {
-                            return this.encode(message, writer).ldelim();
-                        };
+                            /**
+                             * Encodes the specified BigtableColumnFamily message. Does not implicitly {@link google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily.verify|verify} messages.
+                             * @function encode
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumnFamily} message BigtableColumnFamily message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            BigtableColumnFamily.encode = function encode(message, writer) {
+                                if (!writer)
+                                    writer = $Writer.create();
+                                if (message.fieldName != null && Object.hasOwnProperty.call(message, "fieldName"))
+                                    writer.uint32(/* id 1, wireType 2 =*/10).string(message.fieldName);
+                                if (message.encoding != null && Object.hasOwnProperty.call(message, "encoding"))
+                                    writer.uint32(/* id 2, wireType 0 =*/16).int32(message.encoding);
+                                if (message.type != null && Object.hasOwnProperty.call(message, "type"))
+                                    writer.uint32(/* id 3, wireType 0 =*/24).int32(message.type);
+                                if (message.columns != null && message.columns.length)
+                                    for (var i = 0; i < message.columns.length; ++i)
+                                        $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn.encode(message.columns[i], writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
+                                return writer;
+                            };
     
-                        /**
-                         * Decodes a CompleteQueryResponse message from the specified reader or buffer.
-                         * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
-                         * @static
-                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.CompleteQueryResponse} CompleteQueryResponse
-                         * @throws {Error} If the payload is not a reader or valid buffer
-                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                         */
-                        CompleteQueryResponse.decode = function decode(reader, length) {
-                            if (!(reader instanceof $Reader))
-                                reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.CompleteQueryResponse();
-                            while (reader.pos < end) {
-                                var tag = reader.uint32();
-                                switch (tag >>> 3) {
-                                case 1: {
-                                        if (!(message.querySuggestions && message.querySuggestions.length))
-                                            message.querySuggestions = [];
-                                        message.querySuggestions.push($root.google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion.decode(reader, reader.uint32()));
+                            /**
+                             * Encodes the specified BigtableColumnFamily message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily.verify|verify} messages.
+                             * @function encodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumnFamily} message BigtableColumnFamily message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            BigtableColumnFamily.encodeDelimited = function encodeDelimited(message, writer) {
+                                return this.encode(message, writer).ldelim();
+                            };
+    
+                            /**
+                             * Decodes a BigtableColumnFamily message from the specified reader or buffer.
+                             * @function decode
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @param {number} [length] Message length if known beforehand
+                             * @returns {google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily} BigtableColumnFamily
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            BigtableColumnFamily.decode = function decode(reader, length) {
+                                if (!(reader instanceof $Reader))
+                                    reader = $Reader.create(reader);
+                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily();
+                                while (reader.pos < end) {
+                                    var tag = reader.uint32();
+                                    switch (tag >>> 3) {
+                                    case 1: {
+                                            message.fieldName = reader.string();
+                                            break;
+                                        }
+                                    case 2: {
+                                            message.encoding = reader.int32();
+                                            break;
+                                        }
+                                    case 3: {
+                                            message.type = reader.int32();
+                                            break;
+                                        }
+                                    case 4: {
+                                            if (!(message.columns && message.columns.length))
+                                                message.columns = [];
+                                            message.columns.push($root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn.decode(reader, reader.uint32()));
+                                            break;
+                                        }
+                                    default:
+                                        reader.skipType(tag & 7);
+                                        break;
+                                    }
+                                }
+                                return message;
+                            };
+    
+                            /**
+                             * Decodes a BigtableColumnFamily message from the specified reader or buffer, length delimited.
+                             * @function decodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @returns {google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily} BigtableColumnFamily
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            BigtableColumnFamily.decodeDelimited = function decodeDelimited(reader) {
+                                if (!(reader instanceof $Reader))
+                                    reader = new $Reader(reader);
+                                return this.decode(reader, reader.uint32());
+                            };
+    
+                            /**
+                             * Verifies a BigtableColumnFamily message.
+                             * @function verify
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
+                             * @static
+                             * @param {Object.<string,*>} message Plain object to verify
+                             * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                             */
+                            BigtableColumnFamily.verify = function verify(message) {
+                                if (typeof message !== "object" || message === null)
+                                    return "object expected";
+                                if (message.fieldName != null && message.hasOwnProperty("fieldName"))
+                                    if (!$util.isString(message.fieldName))
+                                        return "fieldName: string expected";
+                                if (message.encoding != null && message.hasOwnProperty("encoding"))
+                                    switch (message.encoding) {
+                                    default:
+                                        return "encoding: enum value expected";
+                                    case 0:
+                                    case 1:
+                                    case 2:
+                                        break;
+                                    }
+                                if (message.type != null && message.hasOwnProperty("type"))
+                                    switch (message.type) {
+                                    default:
+                                        return "type: enum value expected";
+                                    case 0:
+                                    case 1:
+                                    case 2:
+                                    case 3:
+                                    case 4:
+                                    case 5:
+                                    case 6:
+                                    case 7:
+                                        break;
+                                    }
+                                if (message.columns != null && message.hasOwnProperty("columns")) {
+                                    if (!Array.isArray(message.columns))
+                                        return "columns: array expected";
+                                    for (var i = 0; i < message.columns.length; ++i) {
+                                        var error = $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn.verify(message.columns[i]);
+                                        if (error)
+                                            return "columns." + error;
+                                    }
+                                }
+                                return null;
+                            };
+    
+                            /**
+                             * Creates a BigtableColumnFamily message from a plain object. Also converts values to their respective internal types.
+                             * @function fromObject
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
+                             * @static
+                             * @param {Object.<string,*>} object Plain object
+                             * @returns {google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily} BigtableColumnFamily
+                             */
+                            BigtableColumnFamily.fromObject = function fromObject(object) {
+                                if (object instanceof $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily)
+                                    return object;
+                                var message = new $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily();
+                                if (object.fieldName != null)
+                                    message.fieldName = String(object.fieldName);
+                                switch (object.encoding) {
+                                default:
+                                    if (typeof object.encoding === "number") {
+                                        message.encoding = object.encoding;
                                         break;
                                     }
-                                case 2: {
-                                        message.tailMatchTriggered = reader.bool();
+                                    break;
+                                case "ENCODING_UNSPECIFIED":
+                                case 0:
+                                    message.encoding = 0;
+                                    break;
+                                case "TEXT":
+                                case 1:
+                                    message.encoding = 1;
+                                    break;
+                                case "BINARY":
+                                case 2:
+                                    message.encoding = 2;
+                                    break;
+                                }
+                                switch (object.type) {
+                                default:
+                                    if (typeof object.type === "number") {
+                                        message.type = object.type;
                                         break;
                                     }
-                                default:
-                                    reader.skipType(tag & 7);
+                                    break;
+                                case "TYPE_UNSPECIFIED":
+                                case 0:
+                                    message.type = 0;
+                                    break;
+                                case "STRING":
+                                case 1:
+                                    message.type = 1;
+                                    break;
+                                case "NUMBER":
+                                case 2:
+                                    message.type = 2;
+                                    break;
+                                case "INTEGER":
+                                case 3:
+                                    message.type = 3;
+                                    break;
+                                case "VAR_INTEGER":
+                                case 4:
+                                    message.type = 4;
+                                    break;
+                                case "BIG_NUMERIC":
+                                case 5:
+                                    message.type = 5;
+                                    break;
+                                case "BOOLEAN":
+                                case 6:
+                                    message.type = 6;
+                                    break;
+                                case "JSON":
+                                case 7:
+                                    message.type = 7;
                                     break;
                                 }
-                            }
-                            return message;
-                        };
-    
-                        /**
-                         * Decodes a CompleteQueryResponse message from the specified reader or buffer, length delimited.
-                         * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
-                         * @static
-                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.CompleteQueryResponse} CompleteQueryResponse
-                         * @throws {Error} If the payload is not a reader or valid buffer
-                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                         */
-                        CompleteQueryResponse.decodeDelimited = function decodeDelimited(reader) {
-                            if (!(reader instanceof $Reader))
-                                reader = new $Reader(reader);
-                            return this.decode(reader, reader.uint32());
-                        };
-    
-                        /**
-                         * Verifies a CompleteQueryResponse message.
-                         * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
-                         * @static
-                         * @param {Object.<string,*>} message Plain object to verify
-                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
-                         */
-                        CompleteQueryResponse.verify = function verify(message) {
-                            if (typeof message !== "object" || message === null)
-                                return "object expected";
-                            if (message.querySuggestions != null && message.hasOwnProperty("querySuggestions")) {
-                                if (!Array.isArray(message.querySuggestions))
-                                    return "querySuggestions: array expected";
-                                for (var i = 0; i < message.querySuggestions.length; ++i) {
-                                    var error = $root.google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion.verify(message.querySuggestions[i]);
-                                    if (error)
-                                        return "querySuggestions." + error;
+                                if (object.columns) {
+                                    if (!Array.isArray(object.columns))
+                                        throw TypeError(".google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily.columns: array expected");
+                                    message.columns = [];
+                                    for (var i = 0; i < object.columns.length; ++i) {
+                                        if (typeof object.columns[i] !== "object")
+                                            throw TypeError(".google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily.columns: object expected");
+                                        message.columns[i] = $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn.fromObject(object.columns[i]);
+                                    }
                                 }
-                            }
-                            if (message.tailMatchTriggered != null && message.hasOwnProperty("tailMatchTriggered"))
-                                if (typeof message.tailMatchTriggered !== "boolean")
-                                    return "tailMatchTriggered: boolean expected";
-                            return null;
-                        };
+                                return message;
+                            };
     
-                        /**
-                         * Creates a CompleteQueryResponse message from a plain object. Also converts values to their respective internal types.
-                         * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
-                         * @static
-                         * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.CompleteQueryResponse} CompleteQueryResponse
-                         */
-                        CompleteQueryResponse.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.CompleteQueryResponse)
-                                return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.CompleteQueryResponse();
-                            if (object.querySuggestions) {
-                                if (!Array.isArray(object.querySuggestions))
-                                    throw TypeError(".google.cloud.discoveryengine.v1.CompleteQueryResponse.querySuggestions: array expected");
-                                message.querySuggestions = [];
-                                for (var i = 0; i < object.querySuggestions.length; ++i) {
-                                    if (typeof object.querySuggestions[i] !== "object")
-                                        throw TypeError(".google.cloud.discoveryengine.v1.CompleteQueryResponse.querySuggestions: object expected");
-                                    message.querySuggestions[i] = $root.google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion.fromObject(object.querySuggestions[i]);
+                            /**
+                             * Creates a plain object from a BigtableColumnFamily message. Also converts values to other types if specified.
+                             * @function toObject
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily} message BigtableColumnFamily
+                             * @param {$protobuf.IConversionOptions} [options] Conversion options
+                             * @returns {Object.<string,*>} Plain object
+                             */
+                            BigtableColumnFamily.toObject = function toObject(message, options) {
+                                if (!options)
+                                    options = {};
+                                var object = {};
+                                if (options.arrays || options.defaults)
+                                    object.columns = [];
+                                if (options.defaults) {
+                                    object.fieldName = "";
+                                    object.encoding = options.enums === String ? "ENCODING_UNSPECIFIED" : 0;
+                                    object.type = options.enums === String ? "TYPE_UNSPECIFIED" : 0;
                                 }
-                            }
-                            if (object.tailMatchTriggered != null)
-                                message.tailMatchTriggered = Boolean(object.tailMatchTriggered);
-                            return message;
-                        };
+                                if (message.fieldName != null && message.hasOwnProperty("fieldName"))
+                                    object.fieldName = message.fieldName;
+                                if (message.encoding != null && message.hasOwnProperty("encoding"))
+                                    object.encoding = options.enums === String ? $root.google.cloud.discoveryengine.v1.BigtableOptions.Encoding[message.encoding] === undefined ? message.encoding : $root.google.cloud.discoveryengine.v1.BigtableOptions.Encoding[message.encoding] : message.encoding;
+                                if (message.type != null && message.hasOwnProperty("type"))
+                                    object.type = options.enums === String ? $root.google.cloud.discoveryengine.v1.BigtableOptions.Type[message.type] === undefined ? message.type : $root.google.cloud.discoveryengine.v1.BigtableOptions.Type[message.type] : message.type;
+                                if (message.columns && message.columns.length) {
+                                    object.columns = [];
+                                    for (var j = 0; j < message.columns.length; ++j)
+                                        object.columns[j] = $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn.toObject(message.columns[j], options);
+                                }
+                                return object;
+                            };
     
-                        /**
-                         * Creates a plain object from a CompleteQueryResponse message. Also converts values to other types if specified.
-                         * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
-                         * @static
-                         * @param {google.cloud.discoveryengine.v1.CompleteQueryResponse} message CompleteQueryResponse
-                         * @param {$protobuf.IConversionOptions} [options] Conversion options
-                         * @returns {Object.<string,*>} Plain object
-                         */
-                        CompleteQueryResponse.toObject = function toObject(message, options) {
-                            if (!options)
-                                options = {};
-                            var object = {};
-                            if (options.arrays || options.defaults)
-                                object.querySuggestions = [];
-                            if (options.defaults)
-                                object.tailMatchTriggered = false;
-                            if (message.querySuggestions && message.querySuggestions.length) {
-                                object.querySuggestions = [];
-                                for (var j = 0; j < message.querySuggestions.length; ++j)
-                                    object.querySuggestions[j] = $root.google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion.toObject(message.querySuggestions[j], options);
-                            }
-                            if (message.tailMatchTriggered != null && message.hasOwnProperty("tailMatchTriggered"))
-                                object.tailMatchTriggered = message.tailMatchTriggered;
-                            return object;
-                        };
+                            /**
+                             * Converts this BigtableColumnFamily to JSON.
+                             * @function toJSON
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
+                             * @instance
+                             * @returns {Object.<string,*>} JSON object
+                             */
+                            BigtableColumnFamily.prototype.toJSON = function toJSON() {
+                                return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                            };
     
-                        /**
-                         * Converts this CompleteQueryResponse to JSON.
-                         * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
-                         * @instance
-                         * @returns {Object.<string,*>} JSON object
-                         */
-                        CompleteQueryResponse.prototype.toJSON = function toJSON() {
-                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
-                        };
+                            /**
+                             * Gets the default type url for BigtableColumnFamily
+                             * @function getTypeUrl
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
+                             * @static
+                             * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                             * @returns {string} The default type url
+                             */
+                            BigtableColumnFamily.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                                if (typeUrlPrefix === undefined) {
+                                    typeUrlPrefix = "type.googleapis.com";
+                                }
+                                return typeUrlPrefix + "/google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily";
+                            };
     
-                        /**
-                         * Gets the default type url for CompleteQueryResponse
-                         * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
-                         * @static
-                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                         * @returns {string} The default type url
-                         */
-                        CompleteQueryResponse.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
-                            if (typeUrlPrefix === undefined) {
-                                typeUrlPrefix = "type.googleapis.com";
-                            }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.CompleteQueryResponse";
-                        };
+                            return BigtableColumnFamily;
+                        })();
     
-                        CompleteQueryResponse.QuerySuggestion = (function() {
+                        BigtableOptions.BigtableColumn = (function() {
     
                             /**
-                             * Properties of a QuerySuggestion.
-                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
-                             * @interface IQuerySuggestion
-                             * @property {string|null} [suggestion] QuerySuggestion suggestion
-                             * @property {Array.<string>|null} [completableFieldPaths] QuerySuggestion completableFieldPaths
+                             * Properties of a BigtableColumn.
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions
+                             * @interface IBigtableColumn
+                             * @property {Uint8Array|null} [qualifier] BigtableColumn qualifier
+                             * @property {string|null} [fieldName] BigtableColumn fieldName
+                             * @property {google.cloud.discoveryengine.v1.BigtableOptions.Encoding|null} [encoding] BigtableColumn encoding
+                             * @property {google.cloud.discoveryengine.v1.BigtableOptions.Type|null} [type] BigtableColumn type
                              */
     
                             /**
-                             * Constructs a new QuerySuggestion.
-                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse
-                             * @classdesc Represents a QuerySuggestion.
-                             * @implements IQuerySuggestion
+                             * Constructs a new BigtableColumn.
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions
+                             * @classdesc Represents a BigtableColumn.
+                             * @implements IBigtableColumn
                              * @constructor
-                             * @param {google.cloud.discoveryengine.v1.CompleteQueryResponse.IQuerySuggestion=} [properties] Properties to set
+                             * @param {google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumn=} [properties] Properties to set
                              */
-                            function QuerySuggestion(properties) {
-                                this.completableFieldPaths = [];
+                            function BigtableColumn(properties) {
                                 if (properties)
                                     for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                         if (properties[keys[i]] != null)
@@ -6850,92 +10264,117 @@
                             }
     
                             /**
-                             * QuerySuggestion suggestion.
-                             * @member {string} suggestion
-                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * BigtableColumn qualifier.
+                             * @member {Uint8Array} qualifier
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
                              * @instance
                              */
-                            QuerySuggestion.prototype.suggestion = "";
+                            BigtableColumn.prototype.qualifier = $util.newBuffer([]);
     
                             /**
-                             * QuerySuggestion completableFieldPaths.
-                             * @member {Array.<string>} completableFieldPaths
-                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * BigtableColumn fieldName.
+                             * @member {string} fieldName
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
                              * @instance
                              */
-                            QuerySuggestion.prototype.completableFieldPaths = $util.emptyArray;
+                            BigtableColumn.prototype.fieldName = "";
     
                             /**
-                             * Creates a new QuerySuggestion instance using the specified properties.
+                             * BigtableColumn encoding.
+                             * @member {google.cloud.discoveryengine.v1.BigtableOptions.Encoding} encoding
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
+                             * @instance
+                             */
+                            BigtableColumn.prototype.encoding = 0;
+    
+                            /**
+                             * BigtableColumn type.
+                             * @member {google.cloud.discoveryengine.v1.BigtableOptions.Type} type
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
+                             * @instance
+                             */
+                            BigtableColumn.prototype.type = 0;
+    
+                            /**
+                             * Creates a new BigtableColumn instance using the specified properties.
                              * @function create
-                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
                              * @static
-                             * @param {google.cloud.discoveryengine.v1.CompleteQueryResponse.IQuerySuggestion=} [properties] Properties to set
-                             * @returns {google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion} QuerySuggestion instance
+                             * @param {google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumn=} [properties] Properties to set
+                             * @returns {google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn} BigtableColumn instance
                              */
-                            QuerySuggestion.create = function create(properties) {
-                                return new QuerySuggestion(properties);
+                            BigtableColumn.create = function create(properties) {
+                                return new BigtableColumn(properties);
                             };
     
                             /**
-                             * Encodes the specified QuerySuggestion message. Does not implicitly {@link google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion.verify|verify} messages.
+                             * Encodes the specified BigtableColumn message. Does not implicitly {@link google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn.verify|verify} messages.
                              * @function encode
-                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
                              * @static
-                             * @param {google.cloud.discoveryengine.v1.CompleteQueryResponse.IQuerySuggestion} message QuerySuggestion message or plain object to encode
+                             * @param {google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumn} message BigtableColumn message or plain object to encode
                              * @param {$protobuf.Writer} [writer] Writer to encode to
                              * @returns {$protobuf.Writer} Writer
                              */
-                            QuerySuggestion.encode = function encode(message, writer) {
+                            BigtableColumn.encode = function encode(message, writer) {
                                 if (!writer)
                                     writer = $Writer.create();
-                                if (message.suggestion != null && Object.hasOwnProperty.call(message, "suggestion"))
-                                    writer.uint32(/* id 1, wireType 2 =*/10).string(message.suggestion);
-                                if (message.completableFieldPaths != null && message.completableFieldPaths.length)
-                                    for (var i = 0; i < message.completableFieldPaths.length; ++i)
-                                        writer.uint32(/* id 2, wireType 2 =*/18).string(message.completableFieldPaths[i]);
+                                if (message.qualifier != null && Object.hasOwnProperty.call(message, "qualifier"))
+                                    writer.uint32(/* id 1, wireType 2 =*/10).bytes(message.qualifier);
+                                if (message.fieldName != null && Object.hasOwnProperty.call(message, "fieldName"))
+                                    writer.uint32(/* id 2, wireType 2 =*/18).string(message.fieldName);
+                                if (message.encoding != null && Object.hasOwnProperty.call(message, "encoding"))
+                                    writer.uint32(/* id 3, wireType 0 =*/24).int32(message.encoding);
+                                if (message.type != null && Object.hasOwnProperty.call(message, "type"))
+                                    writer.uint32(/* id 4, wireType 0 =*/32).int32(message.type);
                                 return writer;
                             };
     
                             /**
-                             * Encodes the specified QuerySuggestion message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion.verify|verify} messages.
+                             * Encodes the specified BigtableColumn message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn.verify|verify} messages.
                              * @function encodeDelimited
-                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
                              * @static
-                             * @param {google.cloud.discoveryengine.v1.CompleteQueryResponse.IQuerySuggestion} message QuerySuggestion message or plain object to encode
+                             * @param {google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumn} message BigtableColumn message or plain object to encode
                              * @param {$protobuf.Writer} [writer] Writer to encode to
                              * @returns {$protobuf.Writer} Writer
                              */
-                            QuerySuggestion.encodeDelimited = function encodeDelimited(message, writer) {
+                            BigtableColumn.encodeDelimited = function encodeDelimited(message, writer) {
                                 return this.encode(message, writer).ldelim();
                             };
     
                             /**
-                             * Decodes a QuerySuggestion message from the specified reader or buffer.
+                             * Decodes a BigtableColumn message from the specified reader or buffer.
                              * @function decode
-                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
                              * @static
                              * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                              * @param {number} [length] Message length if known beforehand
-                             * @returns {google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion} QuerySuggestion
+                             * @returns {google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn} BigtableColumn
                              * @throws {Error} If the payload is not a reader or valid buffer
                              * @throws {$protobuf.util.ProtocolError} If required fields are missing
                              */
-                            QuerySuggestion.decode = function decode(reader, length) {
+                            BigtableColumn.decode = function decode(reader, length) {
                                 if (!(reader instanceof $Reader))
                                     reader = $Reader.create(reader);
-                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion();
+                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn();
                                 while (reader.pos < end) {
                                     var tag = reader.uint32();
                                     switch (tag >>> 3) {
                                     case 1: {
-                                            message.suggestion = reader.string();
+                                            message.qualifier = reader.bytes();
                                             break;
                                         }
                                     case 2: {
-                                            if (!(message.completableFieldPaths && message.completableFieldPaths.length))
-                                                message.completableFieldPaths = [];
-                                            message.completableFieldPaths.push(reader.string());
+                                            message.fieldName = reader.string();
+                                            break;
+                                        }
+                                    case 3: {
+                                            message.encoding = reader.int32();
+                                            break;
+                                        }
+                                    case 4: {
+                                            message.type = reader.int32();
                                             break;
                                         }
                                     default:
@@ -6947,394 +10386,277 @@
                             };
     
                             /**
-                             * Decodes a QuerySuggestion message from the specified reader or buffer, length delimited.
+                             * Decodes a BigtableColumn message from the specified reader or buffer, length delimited.
                              * @function decodeDelimited
-                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
                              * @static
                              * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                             * @returns {google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion} QuerySuggestion
+                             * @returns {google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn} BigtableColumn
                              * @throws {Error} If the payload is not a reader or valid buffer
                              * @throws {$protobuf.util.ProtocolError} If required fields are missing
                              */
-                            QuerySuggestion.decodeDelimited = function decodeDelimited(reader) {
+                            BigtableColumn.decodeDelimited = function decodeDelimited(reader) {
                                 if (!(reader instanceof $Reader))
                                     reader = new $Reader(reader);
                                 return this.decode(reader, reader.uint32());
                             };
     
                             /**
-                             * Verifies a QuerySuggestion message.
+                             * Verifies a BigtableColumn message.
                              * @function verify
-                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
                              * @static
                              * @param {Object.<string,*>} message Plain object to verify
                              * @returns {string|null} `null` if valid, otherwise the reason why it is not
                              */
-                            QuerySuggestion.verify = function verify(message) {
+                            BigtableColumn.verify = function verify(message) {
                                 if (typeof message !== "object" || message === null)
                                     return "object expected";
-                                if (message.suggestion != null && message.hasOwnProperty("suggestion"))
-                                    if (!$util.isString(message.suggestion))
-                                        return "suggestion: string expected";
-                                if (message.completableFieldPaths != null && message.hasOwnProperty("completableFieldPaths")) {
-                                    if (!Array.isArray(message.completableFieldPaths))
-                                        return "completableFieldPaths: array expected";
-                                    for (var i = 0; i < message.completableFieldPaths.length; ++i)
-                                        if (!$util.isString(message.completableFieldPaths[i]))
-                                            return "completableFieldPaths: string[] expected";
-                                }
+                                if (message.qualifier != null && message.hasOwnProperty("qualifier"))
+                                    if (!(message.qualifier && typeof message.qualifier.length === "number" || $util.isString(message.qualifier)))
+                                        return "qualifier: buffer expected";
+                                if (message.fieldName != null && message.hasOwnProperty("fieldName"))
+                                    if (!$util.isString(message.fieldName))
+                                        return "fieldName: string expected";
+                                if (message.encoding != null && message.hasOwnProperty("encoding"))
+                                    switch (message.encoding) {
+                                    default:
+                                        return "encoding: enum value expected";
+                                    case 0:
+                                    case 1:
+                                    case 2:
+                                        break;
+                                    }
+                                if (message.type != null && message.hasOwnProperty("type"))
+                                    switch (message.type) {
+                                    default:
+                                        return "type: enum value expected";
+                                    case 0:
+                                    case 1:
+                                    case 2:
+                                    case 3:
+                                    case 4:
+                                    case 5:
+                                    case 6:
+                                    case 7:
+                                        break;
+                                    }
                                 return null;
                             };
     
                             /**
-                             * Creates a QuerySuggestion message from a plain object. Also converts values to their respective internal types.
+                             * Creates a BigtableColumn message from a plain object. Also converts values to their respective internal types.
                              * @function fromObject
-                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
                              * @static
                              * @param {Object.<string,*>} object Plain object
-                             * @returns {google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion} QuerySuggestion
+                             * @returns {google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn} BigtableColumn
                              */
-                            QuerySuggestion.fromObject = function fromObject(object) {
-                                if (object instanceof $root.google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion)
+                            BigtableColumn.fromObject = function fromObject(object) {
+                                if (object instanceof $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn)
                                     return object;
-                                var message = new $root.google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion();
-                                if (object.suggestion != null)
-                                    message.suggestion = String(object.suggestion);
-                                if (object.completableFieldPaths) {
-                                    if (!Array.isArray(object.completableFieldPaths))
-                                        throw TypeError(".google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion.completableFieldPaths: array expected");
-                                    message.completableFieldPaths = [];
-                                    for (var i = 0; i < object.completableFieldPaths.length; ++i)
-                                        message.completableFieldPaths[i] = String(object.completableFieldPaths[i]);
+                                var message = new $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn();
+                                if (object.qualifier != null)
+                                    if (typeof object.qualifier === "string")
+                                        $util.base64.decode(object.qualifier, message.qualifier = $util.newBuffer($util.base64.length(object.qualifier)), 0);
+                                    else if (object.qualifier.length >= 0)
+                                        message.qualifier = object.qualifier;
+                                if (object.fieldName != null)
+                                    message.fieldName = String(object.fieldName);
+                                switch (object.encoding) {
+                                default:
+                                    if (typeof object.encoding === "number") {
+                                        message.encoding = object.encoding;
+                                        break;
+                                    }
+                                    break;
+                                case "ENCODING_UNSPECIFIED":
+                                case 0:
+                                    message.encoding = 0;
+                                    break;
+                                case "TEXT":
+                                case 1:
+                                    message.encoding = 1;
+                                    break;
+                                case "BINARY":
+                                case 2:
+                                    message.encoding = 2;
+                                    break;
+                                }
+                                switch (object.type) {
+                                default:
+                                    if (typeof object.type === "number") {
+                                        message.type = object.type;
+                                        break;
+                                    }
+                                    break;
+                                case "TYPE_UNSPECIFIED":
+                                case 0:
+                                    message.type = 0;
+                                    break;
+                                case "STRING":
+                                case 1:
+                                    message.type = 1;
+                                    break;
+                                case "NUMBER":
+                                case 2:
+                                    message.type = 2;
+                                    break;
+                                case "INTEGER":
+                                case 3:
+                                    message.type = 3;
+                                    break;
+                                case "VAR_INTEGER":
+                                case 4:
+                                    message.type = 4;
+                                    break;
+                                case "BIG_NUMERIC":
+                                case 5:
+                                    message.type = 5;
+                                    break;
+                                case "BOOLEAN":
+                                case 6:
+                                    message.type = 6;
+                                    break;
+                                case "JSON":
+                                case 7:
+                                    message.type = 7;
+                                    break;
                                 }
                                 return message;
                             };
     
                             /**
-                             * Creates a plain object from a QuerySuggestion message. Also converts values to other types if specified.
+                             * Creates a plain object from a BigtableColumn message. Also converts values to other types if specified.
                              * @function toObject
-                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
                              * @static
-                             * @param {google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion} message QuerySuggestion
+                             * @param {google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn} message BigtableColumn
                              * @param {$protobuf.IConversionOptions} [options] Conversion options
                              * @returns {Object.<string,*>} Plain object
                              */
-                            QuerySuggestion.toObject = function toObject(message, options) {
+                            BigtableColumn.toObject = function toObject(message, options) {
                                 if (!options)
                                     options = {};
                                 var object = {};
-                                if (options.arrays || options.defaults)
-                                    object.completableFieldPaths = [];
-                                if (options.defaults)
-                                    object.suggestion = "";
-                                if (message.suggestion != null && message.hasOwnProperty("suggestion"))
-                                    object.suggestion = message.suggestion;
-                                if (message.completableFieldPaths && message.completableFieldPaths.length) {
-                                    object.completableFieldPaths = [];
-                                    for (var j = 0; j < message.completableFieldPaths.length; ++j)
-                                        object.completableFieldPaths[j] = message.completableFieldPaths[j];
+                                if (options.defaults) {
+                                    if (options.bytes === String)
+                                        object.qualifier = "";
+                                    else {
+                                        object.qualifier = [];
+                                        if (options.bytes !== Array)
+                                            object.qualifier = $util.newBuffer(object.qualifier);
+                                    }
+                                    object.fieldName = "";
+                                    object.encoding = options.enums === String ? "ENCODING_UNSPECIFIED" : 0;
+                                    object.type = options.enums === String ? "TYPE_UNSPECIFIED" : 0;
                                 }
+                                if (message.qualifier != null && message.hasOwnProperty("qualifier"))
+                                    object.qualifier = options.bytes === String ? $util.base64.encode(message.qualifier, 0, message.qualifier.length) : options.bytes === Array ? Array.prototype.slice.call(message.qualifier) : message.qualifier;
+                                if (message.fieldName != null && message.hasOwnProperty("fieldName"))
+                                    object.fieldName = message.fieldName;
+                                if (message.encoding != null && message.hasOwnProperty("encoding"))
+                                    object.encoding = options.enums === String ? $root.google.cloud.discoveryengine.v1.BigtableOptions.Encoding[message.encoding] === undefined ? message.encoding : $root.google.cloud.discoveryengine.v1.BigtableOptions.Encoding[message.encoding] : message.encoding;
+                                if (message.type != null && message.hasOwnProperty("type"))
+                                    object.type = options.enums === String ? $root.google.cloud.discoveryengine.v1.BigtableOptions.Type[message.type] === undefined ? message.type : $root.google.cloud.discoveryengine.v1.BigtableOptions.Type[message.type] : message.type;
                                 return object;
                             };
     
                             /**
-                             * Converts this QuerySuggestion to JSON.
+                             * Converts this BigtableColumn to JSON.
                              * @function toJSON
-                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
                              * @instance
                              * @returns {Object.<string,*>} JSON object
                              */
-                            QuerySuggestion.prototype.toJSON = function toJSON() {
+                            BigtableColumn.prototype.toJSON = function toJSON() {
                                 return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                             };
     
                             /**
-                             * Gets the default type url for QuerySuggestion
+                             * Gets the default type url for BigtableColumn
                              * @function getTypeUrl
-                             * @memberof google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion
+                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
                              * @static
                              * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                              * @returns {string} The default type url
                              */
-                            QuerySuggestion.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                            BigtableColumn.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                                 if (typeUrlPrefix === undefined) {
                                     typeUrlPrefix = "type.googleapis.com";
                                 }
-                                return typeUrlPrefix + "/google.cloud.discoveryengine.v1.CompleteQueryResponse.QuerySuggestion";
+                                return typeUrlPrefix + "/google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn";
                             };
     
-                            return QuerySuggestion;
+                            return BigtableColumn;
                         })();
     
-                        return CompleteQueryResponse;
-                    })();
-    
-                    v1.GcsSource = (function() {
-    
-                        /**
-                         * Properties of a GcsSource.
-                         * @memberof google.cloud.discoveryengine.v1
-                         * @interface IGcsSource
-                         * @property {Array.<string>|null} [inputUris] GcsSource inputUris
-                         * @property {string|null} [dataSchema] GcsSource dataSchema
-                         */
-    
-                        /**
-                         * Constructs a new GcsSource.
-                         * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a GcsSource.
-                         * @implements IGcsSource
-                         * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IGcsSource=} [properties] Properties to set
-                         */
-                        function GcsSource(properties) {
-                            this.inputUris = [];
-                            if (properties)
-                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
-                                    if (properties[keys[i]] != null)
-                                        this[keys[i]] = properties[keys[i]];
-                        }
-    
-                        /**
-                         * GcsSource inputUris.
-                         * @member {Array.<string>} inputUris
-                         * @memberof google.cloud.discoveryengine.v1.GcsSource
-                         * @instance
-                         */
-                        GcsSource.prototype.inputUris = $util.emptyArray;
-    
-                        /**
-                         * GcsSource dataSchema.
-                         * @member {string} dataSchema
-                         * @memberof google.cloud.discoveryengine.v1.GcsSource
-                         * @instance
-                         */
-                        GcsSource.prototype.dataSchema = "";
-    
-                        /**
-                         * Creates a new GcsSource instance using the specified properties.
-                         * @function create
-                         * @memberof google.cloud.discoveryengine.v1.GcsSource
-                         * @static
-                         * @param {google.cloud.discoveryengine.v1.IGcsSource=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.GcsSource} GcsSource instance
-                         */
-                        GcsSource.create = function create(properties) {
-                            return new GcsSource(properties);
-                        };
-    
-                        /**
-                         * Encodes the specified GcsSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.GcsSource.verify|verify} messages.
-                         * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.GcsSource
-                         * @static
-                         * @param {google.cloud.discoveryengine.v1.IGcsSource} message GcsSource message or plain object to encode
-                         * @param {$protobuf.Writer} [writer] Writer to encode to
-                         * @returns {$protobuf.Writer} Writer
-                         */
-                        GcsSource.encode = function encode(message, writer) {
-                            if (!writer)
-                                writer = $Writer.create();
-                            if (message.inputUris != null && message.inputUris.length)
-                                for (var i = 0; i < message.inputUris.length; ++i)
-                                    writer.uint32(/* id 1, wireType 2 =*/10).string(message.inputUris[i]);
-                            if (message.dataSchema != null && Object.hasOwnProperty.call(message, "dataSchema"))
-                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.dataSchema);
-                            return writer;
-                        };
-    
-                        /**
-                         * Encodes the specified GcsSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.GcsSource.verify|verify} messages.
-                         * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.GcsSource
-                         * @static
-                         * @param {google.cloud.discoveryengine.v1.IGcsSource} message GcsSource message or plain object to encode
-                         * @param {$protobuf.Writer} [writer] Writer to encode to
-                         * @returns {$protobuf.Writer} Writer
-                         */
-                        GcsSource.encodeDelimited = function encodeDelimited(message, writer) {
-                            return this.encode(message, writer).ldelim();
-                        };
-    
-                        /**
-                         * Decodes a GcsSource message from the specified reader or buffer.
-                         * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.GcsSource
-                         * @static
-                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.GcsSource} GcsSource
-                         * @throws {Error} If the payload is not a reader or valid buffer
-                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                         */
-                        GcsSource.decode = function decode(reader, length) {
-                            if (!(reader instanceof $Reader))
-                                reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.GcsSource();
-                            while (reader.pos < end) {
-                                var tag = reader.uint32();
-                                switch (tag >>> 3) {
-                                case 1: {
-                                        if (!(message.inputUris && message.inputUris.length))
-                                            message.inputUris = [];
-                                        message.inputUris.push(reader.string());
-                                        break;
-                                    }
-                                case 2: {
-                                        message.dataSchema = reader.string();
-                                        break;
-                                    }
-                                default:
-                                    reader.skipType(tag & 7);
-                                    break;
-                                }
-                            }
-                            return message;
-                        };
-    
-                        /**
-                         * Decodes a GcsSource message from the specified reader or buffer, length delimited.
-                         * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.GcsSource
-                         * @static
-                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.GcsSource} GcsSource
-                         * @throws {Error} If the payload is not a reader or valid buffer
-                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                         */
-                        GcsSource.decodeDelimited = function decodeDelimited(reader) {
-                            if (!(reader instanceof $Reader))
-                                reader = new $Reader(reader);
-                            return this.decode(reader, reader.uint32());
-                        };
-    
-                        /**
-                         * Verifies a GcsSource message.
-                         * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.GcsSource
-                         * @static
-                         * @param {Object.<string,*>} message Plain object to verify
-                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
-                         */
-                        GcsSource.verify = function verify(message) {
-                            if (typeof message !== "object" || message === null)
-                                return "object expected";
-                            if (message.inputUris != null && message.hasOwnProperty("inputUris")) {
-                                if (!Array.isArray(message.inputUris))
-                                    return "inputUris: array expected";
-                                for (var i = 0; i < message.inputUris.length; ++i)
-                                    if (!$util.isString(message.inputUris[i]))
-                                        return "inputUris: string[] expected";
-                            }
-                            if (message.dataSchema != null && message.hasOwnProperty("dataSchema"))
-                                if (!$util.isString(message.dataSchema))
-                                    return "dataSchema: string expected";
-                            return null;
-                        };
-    
-                        /**
-                         * Creates a GcsSource message from a plain object. Also converts values to their respective internal types.
-                         * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.GcsSource
-                         * @static
-                         * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.GcsSource} GcsSource
-                         */
-                        GcsSource.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.GcsSource)
-                                return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.GcsSource();
-                            if (object.inputUris) {
-                                if (!Array.isArray(object.inputUris))
-                                    throw TypeError(".google.cloud.discoveryengine.v1.GcsSource.inputUris: array expected");
-                                message.inputUris = [];
-                                for (var i = 0; i < object.inputUris.length; ++i)
-                                    message.inputUris[i] = String(object.inputUris[i]);
-                            }
-                            if (object.dataSchema != null)
-                                message.dataSchema = String(object.dataSchema);
-                            return message;
-                        };
-    
-                        /**
-                         * Creates a plain object from a GcsSource message. Also converts values to other types if specified.
-                         * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.GcsSource
-                         * @static
-                         * @param {google.cloud.discoveryengine.v1.GcsSource} message GcsSource
-                         * @param {$protobuf.IConversionOptions} [options] Conversion options
-                         * @returns {Object.<string,*>} Plain object
-                         */
-                        GcsSource.toObject = function toObject(message, options) {
-                            if (!options)
-                                options = {};
-                            var object = {};
-                            if (options.arrays || options.defaults)
-                                object.inputUris = [];
-                            if (options.defaults)
-                                object.dataSchema = "";
-                            if (message.inputUris && message.inputUris.length) {
-                                object.inputUris = [];
-                                for (var j = 0; j < message.inputUris.length; ++j)
-                                    object.inputUris[j] = message.inputUris[j];
-                            }
-                            if (message.dataSchema != null && message.hasOwnProperty("dataSchema"))
-                                object.dataSchema = message.dataSchema;
-                            return object;
-                        };
-    
                         /**
-                         * Converts this GcsSource to JSON.
-                         * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.GcsSource
-                         * @instance
-                         * @returns {Object.<string,*>} JSON object
+                         * Type enum.
+                         * @name google.cloud.discoveryengine.v1.BigtableOptions.Type
+                         * @enum {number}
+                         * @property {number} TYPE_UNSPECIFIED=0 TYPE_UNSPECIFIED value
+                         * @property {number} STRING=1 STRING value
+                         * @property {number} NUMBER=2 NUMBER value
+                         * @property {number} INTEGER=3 INTEGER value
+                         * @property {number} VAR_INTEGER=4 VAR_INTEGER value
+                         * @property {number} BIG_NUMERIC=5 BIG_NUMERIC value
+                         * @property {number} BOOLEAN=6 BOOLEAN value
+                         * @property {number} JSON=7 JSON value
                          */
-                        GcsSource.prototype.toJSON = function toJSON() {
-                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
-                        };
+                        BigtableOptions.Type = (function() {
+                            var valuesById = {}, values = Object.create(valuesById);
+                            values[valuesById[0] = "TYPE_UNSPECIFIED"] = 0;
+                            values[valuesById[1] = "STRING"] = 1;
+                            values[valuesById[2] = "NUMBER"] = 2;
+                            values[valuesById[3] = "INTEGER"] = 3;
+                            values[valuesById[4] = "VAR_INTEGER"] = 4;
+                            values[valuesById[5] = "BIG_NUMERIC"] = 5;
+                            values[valuesById[6] = "BOOLEAN"] = 6;
+                            values[valuesById[7] = "JSON"] = 7;
+                            return values;
+                        })();
     
                         /**
-                         * Gets the default type url for GcsSource
-                         * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.GcsSource
-                         * @static
-                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                         * @returns {string} The default type url
+                         * Encoding enum.
+                         * @name google.cloud.discoveryengine.v1.BigtableOptions.Encoding
+                         * @enum {number}
+                         * @property {number} ENCODING_UNSPECIFIED=0 ENCODING_UNSPECIFIED value
+                         * @property {number} TEXT=1 TEXT value
+                         * @property {number} BINARY=2 BINARY value
                          */
-                        GcsSource.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
-                            if (typeUrlPrefix === undefined) {
-                                typeUrlPrefix = "type.googleapis.com";
-                            }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.GcsSource";
-                        };
+                        BigtableOptions.Encoding = (function() {
+                            var valuesById = {}, values = Object.create(valuesById);
+                            values[valuesById[0] = "ENCODING_UNSPECIFIED"] = 0;
+                            values[valuesById[1] = "TEXT"] = 1;
+                            values[valuesById[2] = "BINARY"] = 2;
+                            return values;
+                        })();
     
-                        return GcsSource;
+                        return BigtableOptions;
                     })();
     
-                    v1.BigQuerySource = (function() {
+                    v1.BigtableSource = (function() {
     
                         /**
-                         * Properties of a BigQuerySource.
+                         * Properties of a BigtableSource.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IBigQuerySource
-                         * @property {google.type.IDate|null} [partitionDate] BigQuerySource partitionDate
-                         * @property {string|null} [projectId] BigQuerySource projectId
-                         * @property {string|null} [datasetId] BigQuerySource datasetId
-                         * @property {string|null} [tableId] BigQuerySource tableId
-                         * @property {string|null} [gcsStagingDir] BigQuerySource gcsStagingDir
-                         * @property {string|null} [dataSchema] BigQuerySource dataSchema
+                         * @interface IBigtableSource
+                         * @property {string|null} [projectId] BigtableSource projectId
+                         * @property {string|null} [instanceId] BigtableSource instanceId
+                         * @property {string|null} [tableId] BigtableSource tableId
+                         * @property {google.cloud.discoveryengine.v1.IBigtableOptions|null} [bigtableOptions] BigtableSource bigtableOptions
                          */
     
                         /**
-                         * Constructs a new BigQuerySource.
+                         * Constructs a new BigtableSource.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a BigQuerySource.
-                         * @implements IBigQuerySource
+                         * @classdesc Represents a BigtableSource.
+                         * @implements IBigtableSource
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IBigQuerySource=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IBigtableSource=} [properties] Properties to set
                          */
-                        function BigQuerySource(properties) {
+                        function BigtableSource(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -7342,147 +10664,109 @@
                         }
     
                         /**
-                         * BigQuerySource partitionDate.
-                         * @member {google.type.IDate|null|undefined} partitionDate
-                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
-                         * @instance
-                         */
-                        BigQuerySource.prototype.partitionDate = null;
-    
-                        /**
-                         * BigQuerySource projectId.
+                         * BigtableSource projectId.
                          * @member {string} projectId
-                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
+                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
                          * @instance
                          */
-                        BigQuerySource.prototype.projectId = "";
+                        BigtableSource.prototype.projectId = "";
     
                         /**
-                         * BigQuerySource datasetId.
-                         * @member {string} datasetId
-                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
+                         * BigtableSource instanceId.
+                         * @member {string} instanceId
+                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
                          * @instance
                          */
-                        BigQuerySource.prototype.datasetId = "";
+                        BigtableSource.prototype.instanceId = "";
     
                         /**
-                         * BigQuerySource tableId.
+                         * BigtableSource tableId.
                          * @member {string} tableId
-                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
-                         * @instance
-                         */
-                        BigQuerySource.prototype.tableId = "";
-    
-                        /**
-                         * BigQuerySource gcsStagingDir.
-                         * @member {string} gcsStagingDir
-                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
-                         * @instance
-                         */
-                        BigQuerySource.prototype.gcsStagingDir = "";
-    
-                        /**
-                         * BigQuerySource dataSchema.
-                         * @member {string} dataSchema
-                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
+                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
                          * @instance
                          */
-                        BigQuerySource.prototype.dataSchema = "";
-    
-                        // OneOf field names bound to virtual getters and setters
-                        var $oneOfFields;
+                        BigtableSource.prototype.tableId = "";
     
                         /**
-                         * BigQuerySource partition.
-                         * @member {"partitionDate"|undefined} partition
-                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
+                         * BigtableSource bigtableOptions.
+                         * @member {google.cloud.discoveryengine.v1.IBigtableOptions|null|undefined} bigtableOptions
+                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
                          * @instance
                          */
-                        Object.defineProperty(BigQuerySource.prototype, "partition", {
-                            get: $util.oneOfGetter($oneOfFields = ["partitionDate"]),
-                            set: $util.oneOfSetter($oneOfFields)
-                        });
+                        BigtableSource.prototype.bigtableOptions = null;
     
                         /**
-                         * Creates a new BigQuerySource instance using the specified properties.
+                         * Creates a new BigtableSource instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
+                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IBigQuerySource=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.BigQuerySource} BigQuerySource instance
+                         * @param {google.cloud.discoveryengine.v1.IBigtableSource=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.BigtableSource} BigtableSource instance
                          */
-                        BigQuerySource.create = function create(properties) {
-                            return new BigQuerySource(properties);
+                        BigtableSource.create = function create(properties) {
+                            return new BigtableSource(properties);
                         };
     
                         /**
-                         * Encodes the specified BigQuerySource message. Does not implicitly {@link google.cloud.discoveryengine.v1.BigQuerySource.verify|verify} messages.
+                         * Encodes the specified BigtableSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.BigtableSource.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
+                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IBigQuerySource} message BigQuerySource message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IBigtableSource} message BigtableSource message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        BigQuerySource.encode = function encode(message, writer) {
+                        BigtableSource.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
                             if (message.projectId != null && Object.hasOwnProperty.call(message, "projectId"))
                                 writer.uint32(/* id 1, wireType 2 =*/10).string(message.projectId);
-                            if (message.datasetId != null && Object.hasOwnProperty.call(message, "datasetId"))
-                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.datasetId);
+                            if (message.instanceId != null && Object.hasOwnProperty.call(message, "instanceId"))
+                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.instanceId);
                             if (message.tableId != null && Object.hasOwnProperty.call(message, "tableId"))
                                 writer.uint32(/* id 3, wireType 2 =*/26).string(message.tableId);
-                            if (message.gcsStagingDir != null && Object.hasOwnProperty.call(message, "gcsStagingDir"))
-                                writer.uint32(/* id 4, wireType 2 =*/34).string(message.gcsStagingDir);
-                            if (message.partitionDate != null && Object.hasOwnProperty.call(message, "partitionDate"))
-                                $root.google.type.Date.encode(message.partitionDate, writer.uint32(/* id 5, wireType 2 =*/42).fork()).ldelim();
-                            if (message.dataSchema != null && Object.hasOwnProperty.call(message, "dataSchema"))
-                                writer.uint32(/* id 6, wireType 2 =*/50).string(message.dataSchema);
+                            if (message.bigtableOptions != null && Object.hasOwnProperty.call(message, "bigtableOptions"))
+                                $root.google.cloud.discoveryengine.v1.BigtableOptions.encode(message.bigtableOptions, writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified BigQuerySource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.BigQuerySource.verify|verify} messages.
+                         * Encodes the specified BigtableSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.BigtableSource.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
+                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IBigQuerySource} message BigQuerySource message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IBigtableSource} message BigtableSource message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        BigQuerySource.encodeDelimited = function encodeDelimited(message, writer) {
+                        BigtableSource.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a BigQuerySource message from the specified reader or buffer.
+                         * Decodes a BigtableSource message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
+                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.BigQuerySource} BigQuerySource
+                         * @returns {google.cloud.discoveryengine.v1.BigtableSource} BigtableSource
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        BigQuerySource.decode = function decode(reader, length) {
+                        BigtableSource.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.BigQuerySource();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.BigtableSource();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
-                                case 5: {
-                                        message.partitionDate = $root.google.type.Date.decode(reader, reader.uint32());
-                                        break;
-                                    }
                                 case 1: {
                                         message.projectId = reader.string();
                                         break;
                                     }
                                 case 2: {
-                                        message.datasetId = reader.string();
+                                        message.instanceId = reader.string();
                                         break;
                                     }
                                 case 3: {
@@ -7490,11 +10774,7 @@
                                         break;
                                     }
                                 case 4: {
-                                        message.gcsStagingDir = reader.string();
-                                        break;
-                                    }
-                                case 6: {
-                                        message.dataSchema = reader.string();
+                                        message.bigtableOptions = $root.google.cloud.discoveryengine.v1.BigtableOptions.decode(reader, reader.uint32());
                                         break;
                                     }
                                 default:
@@ -7506,178 +10786,153 @@
                         };
     
                         /**
-                         * Decodes a BigQuerySource message from the specified reader or buffer, length delimited.
+                         * Decodes a BigtableSource message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
+                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.BigQuerySource} BigQuerySource
+                         * @returns {google.cloud.discoveryengine.v1.BigtableSource} BigtableSource
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        BigQuerySource.decodeDelimited = function decodeDelimited(reader) {
+                        BigtableSource.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a BigQuerySource message.
+                         * Verifies a BigtableSource message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
-                         * @static
-                         * @param {Object.<string,*>} message Plain object to verify
-                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
-                         */
-                        BigQuerySource.verify = function verify(message) {
-                            if (typeof message !== "object" || message === null)
-                                return "object expected";
-                            var properties = {};
-                            if (message.partitionDate != null && message.hasOwnProperty("partitionDate")) {
-                                properties.partition = 1;
-                                {
-                                    var error = $root.google.type.Date.verify(message.partitionDate);
-                                    if (error)
-                                        return "partitionDate." + error;
-                                }
-                            }
+                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
+                         * @static
+                         * @param {Object.<string,*>} message Plain object to verify
+                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                         */
+                        BigtableSource.verify = function verify(message) {
+                            if (typeof message !== "object" || message === null)
+                                return "object expected";
                             if (message.projectId != null && message.hasOwnProperty("projectId"))
                                 if (!$util.isString(message.projectId))
                                     return "projectId: string expected";
-                            if (message.datasetId != null && message.hasOwnProperty("datasetId"))
-                                if (!$util.isString(message.datasetId))
-                                    return "datasetId: string expected";
+                            if (message.instanceId != null && message.hasOwnProperty("instanceId"))
+                                if (!$util.isString(message.instanceId))
+                                    return "instanceId: string expected";
                             if (message.tableId != null && message.hasOwnProperty("tableId"))
                                 if (!$util.isString(message.tableId))
                                     return "tableId: string expected";
-                            if (message.gcsStagingDir != null && message.hasOwnProperty("gcsStagingDir"))
-                                if (!$util.isString(message.gcsStagingDir))
-                                    return "gcsStagingDir: string expected";
-                            if (message.dataSchema != null && message.hasOwnProperty("dataSchema"))
-                                if (!$util.isString(message.dataSchema))
-                                    return "dataSchema: string expected";
+                            if (message.bigtableOptions != null && message.hasOwnProperty("bigtableOptions")) {
+                                var error = $root.google.cloud.discoveryengine.v1.BigtableOptions.verify(message.bigtableOptions);
+                                if (error)
+                                    return "bigtableOptions." + error;
+                            }
                             return null;
                         };
     
                         /**
-                         * Creates a BigQuerySource message from a plain object. Also converts values to their respective internal types.
+                         * Creates a BigtableSource message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
+                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.BigQuerySource} BigQuerySource
+                         * @returns {google.cloud.discoveryengine.v1.BigtableSource} BigtableSource
                          */
-                        BigQuerySource.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.BigQuerySource)
+                        BigtableSource.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.BigtableSource)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.BigQuerySource();
-                            if (object.partitionDate != null) {
-                                if (typeof object.partitionDate !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.BigQuerySource.partitionDate: object expected");
-                                message.partitionDate = $root.google.type.Date.fromObject(object.partitionDate);
-                            }
+                            var message = new $root.google.cloud.discoveryengine.v1.BigtableSource();
                             if (object.projectId != null)
                                 message.projectId = String(object.projectId);
-                            if (object.datasetId != null)
-                                message.datasetId = String(object.datasetId);
+                            if (object.instanceId != null)
+                                message.instanceId = String(object.instanceId);
                             if (object.tableId != null)
                                 message.tableId = String(object.tableId);
-                            if (object.gcsStagingDir != null)
-                                message.gcsStagingDir = String(object.gcsStagingDir);
-                            if (object.dataSchema != null)
-                                message.dataSchema = String(object.dataSchema);
+                            if (object.bigtableOptions != null) {
+                                if (typeof object.bigtableOptions !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.BigtableSource.bigtableOptions: object expected");
+                                message.bigtableOptions = $root.google.cloud.discoveryengine.v1.BigtableOptions.fromObject(object.bigtableOptions);
+                            }
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a BigQuerySource message. Also converts values to other types if specified.
+                         * Creates a plain object from a BigtableSource message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
+                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.BigQuerySource} message BigQuerySource
+                         * @param {google.cloud.discoveryengine.v1.BigtableSource} message BigtableSource
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        BigQuerySource.toObject = function toObject(message, options) {
+                        BigtableSource.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
                             if (options.defaults) {
                                 object.projectId = "";
-                                object.datasetId = "";
+                                object.instanceId = "";
                                 object.tableId = "";
-                                object.gcsStagingDir = "";
-                                object.dataSchema = "";
+                                object.bigtableOptions = null;
                             }
                             if (message.projectId != null && message.hasOwnProperty("projectId"))
                                 object.projectId = message.projectId;
-                            if (message.datasetId != null && message.hasOwnProperty("datasetId"))
-                                object.datasetId = message.datasetId;
+                            if (message.instanceId != null && message.hasOwnProperty("instanceId"))
+                                object.instanceId = message.instanceId;
                             if (message.tableId != null && message.hasOwnProperty("tableId"))
                                 object.tableId = message.tableId;
-                            if (message.gcsStagingDir != null && message.hasOwnProperty("gcsStagingDir"))
-                                object.gcsStagingDir = message.gcsStagingDir;
-                            if (message.partitionDate != null && message.hasOwnProperty("partitionDate")) {
-                                object.partitionDate = $root.google.type.Date.toObject(message.partitionDate, options);
-                                if (options.oneofs)
-                                    object.partition = "partitionDate";
-                            }
-                            if (message.dataSchema != null && message.hasOwnProperty("dataSchema"))
-                                object.dataSchema = message.dataSchema;
+                            if (message.bigtableOptions != null && message.hasOwnProperty("bigtableOptions"))
+                                object.bigtableOptions = $root.google.cloud.discoveryengine.v1.BigtableOptions.toObject(message.bigtableOptions, options);
                             return object;
                         };
     
                         /**
-                         * Converts this BigQuerySource to JSON.
+                         * Converts this BigtableSource to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
+                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        BigQuerySource.prototype.toJSON = function toJSON() {
+                        BigtableSource.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for BigQuerySource
+                         * Gets the default type url for BigtableSource
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.BigQuerySource
+                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        BigQuerySource.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        BigtableSource.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.BigQuerySource";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.BigtableSource";
                         };
     
-                        return BigQuerySource;
+                        return BigtableSource;
                     })();
     
-                    v1.SpannerSource = (function() {
+                    v1.FhirStoreSource = (function() {
     
                         /**
-                         * Properties of a SpannerSource.
+                         * Properties of a FhirStoreSource.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface ISpannerSource
-                         * @property {string|null} [projectId] SpannerSource projectId
-                         * @property {string|null} [instanceId] SpannerSource instanceId
-                         * @property {string|null} [databaseId] SpannerSource databaseId
-                         * @property {string|null} [tableId] SpannerSource tableId
-                         * @property {boolean|null} [enableDataBoost] SpannerSource enableDataBoost
+                         * @interface IFhirStoreSource
+                         * @property {string|null} [fhirStore] FhirStoreSource fhirStore
+                         * @property {string|null} [gcsStagingDir] FhirStoreSource gcsStagingDir
                          */
     
                         /**
-                         * Constructs a new SpannerSource.
+                         * Constructs a new FhirStoreSource.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a SpannerSource.
-                         * @implements ISpannerSource
+                         * @classdesc Represents a FhirStoreSource.
+                         * @implements IFhirStoreSource
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.ISpannerSource=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IFhirStoreSource=} [properties] Properties to set
                          */
-                        function SpannerSource(properties) {
+                        function FhirStoreSource(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -7685,131 +10940,89 @@
                         }
     
                         /**
-                         * SpannerSource projectId.
-                         * @member {string} projectId
-                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
-                         * @instance
-                         */
-                        SpannerSource.prototype.projectId = "";
-    
-                        /**
-                         * SpannerSource instanceId.
-                         * @member {string} instanceId
-                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
-                         * @instance
-                         */
-                        SpannerSource.prototype.instanceId = "";
-    
-                        /**
-                         * SpannerSource databaseId.
-                         * @member {string} databaseId
-                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
-                         * @instance
-                         */
-                        SpannerSource.prototype.databaseId = "";
-    
-                        /**
-                         * SpannerSource tableId.
-                         * @member {string} tableId
-                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
+                         * FhirStoreSource fhirStore.
+                         * @member {string} fhirStore
+                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
                          * @instance
                          */
-                        SpannerSource.prototype.tableId = "";
+                        FhirStoreSource.prototype.fhirStore = "";
     
                         /**
-                         * SpannerSource enableDataBoost.
-                         * @member {boolean} enableDataBoost
-                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
+                         * FhirStoreSource gcsStagingDir.
+                         * @member {string} gcsStagingDir
+                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
                          * @instance
                          */
-                        SpannerSource.prototype.enableDataBoost = false;
+                        FhirStoreSource.prototype.gcsStagingDir = "";
     
                         /**
-                         * Creates a new SpannerSource instance using the specified properties.
+                         * Creates a new FhirStoreSource instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
+                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ISpannerSource=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.SpannerSource} SpannerSource instance
+                         * @param {google.cloud.discoveryengine.v1.IFhirStoreSource=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.FhirStoreSource} FhirStoreSource instance
                          */
-                        SpannerSource.create = function create(properties) {
-                            return new SpannerSource(properties);
+                        FhirStoreSource.create = function create(properties) {
+                            return new FhirStoreSource(properties);
                         };
     
                         /**
-                         * Encodes the specified SpannerSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.SpannerSource.verify|verify} messages.
+                         * Encodes the specified FhirStoreSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.FhirStoreSource.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
+                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ISpannerSource} message SpannerSource message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IFhirStoreSource} message FhirStoreSource message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        SpannerSource.encode = function encode(message, writer) {
+                        FhirStoreSource.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.projectId != null && Object.hasOwnProperty.call(message, "projectId"))
-                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.projectId);
-                            if (message.instanceId != null && Object.hasOwnProperty.call(message, "instanceId"))
-                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.instanceId);
-                            if (message.databaseId != null && Object.hasOwnProperty.call(message, "databaseId"))
-                                writer.uint32(/* id 3, wireType 2 =*/26).string(message.databaseId);
-                            if (message.tableId != null && Object.hasOwnProperty.call(message, "tableId"))
-                                writer.uint32(/* id 4, wireType 2 =*/34).string(message.tableId);
-                            if (message.enableDataBoost != null && Object.hasOwnProperty.call(message, "enableDataBoost"))
-                                writer.uint32(/* id 5, wireType 0 =*/40).bool(message.enableDataBoost);
+                            if (message.fhirStore != null && Object.hasOwnProperty.call(message, "fhirStore"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.fhirStore);
+                            if (message.gcsStagingDir != null && Object.hasOwnProperty.call(message, "gcsStagingDir"))
+                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.gcsStagingDir);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified SpannerSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.SpannerSource.verify|verify} messages.
+                         * Encodes the specified FhirStoreSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.FhirStoreSource.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
+                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ISpannerSource} message SpannerSource message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IFhirStoreSource} message FhirStoreSource message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        SpannerSource.encodeDelimited = function encodeDelimited(message, writer) {
+                        FhirStoreSource.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a SpannerSource message from the specified reader or buffer.
+                         * Decodes a FhirStoreSource message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
+                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.SpannerSource} SpannerSource
+                         * @returns {google.cloud.discoveryengine.v1.FhirStoreSource} FhirStoreSource
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        SpannerSource.decode = function decode(reader, length) {
+                        FhirStoreSource.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.SpannerSource();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.FhirStoreSource();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 1: {
-                                        message.projectId = reader.string();
+                                        message.fhirStore = reader.string();
                                         break;
                                     }
                                 case 2: {
-                                        message.instanceId = reader.string();
-                                        break;
-                                    }
-                                case 3: {
-                                        message.databaseId = reader.string();
-                                        break;
-                                    }
-                                case 4: {
-                                        message.tableId = reader.string();
-                                        break;
-                                    }
-                                case 5: {
-                                        message.enableDataBoost = reader.bool();
+                                        message.gcsStagingDir = reader.string();
                                         break;
                                     }
                                 default:
@@ -7821,157 +11034,136 @@
                         };
     
                         /**
-                         * Decodes a SpannerSource message from the specified reader or buffer, length delimited.
+                         * Decodes a FhirStoreSource message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
+                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.SpannerSource} SpannerSource
+                         * @returns {google.cloud.discoveryengine.v1.FhirStoreSource} FhirStoreSource
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        SpannerSource.decodeDelimited = function decodeDelimited(reader) {
+                        FhirStoreSource.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a SpannerSource message.
+                         * Verifies a FhirStoreSource message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
+                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        SpannerSource.verify = function verify(message) {
+                        FhirStoreSource.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            if (message.projectId != null && message.hasOwnProperty("projectId"))
-                                if (!$util.isString(message.projectId))
-                                    return "projectId: string expected";
-                            if (message.instanceId != null && message.hasOwnProperty("instanceId"))
-                                if (!$util.isString(message.instanceId))
-                                    return "instanceId: string expected";
-                            if (message.databaseId != null && message.hasOwnProperty("databaseId"))
-                                if (!$util.isString(message.databaseId))
-                                    return "databaseId: string expected";
-                            if (message.tableId != null && message.hasOwnProperty("tableId"))
-                                if (!$util.isString(message.tableId))
-                                    return "tableId: string expected";
-                            if (message.enableDataBoost != null && message.hasOwnProperty("enableDataBoost"))
-                                if (typeof message.enableDataBoost !== "boolean")
-                                    return "enableDataBoost: boolean expected";
+                            if (message.fhirStore != null && message.hasOwnProperty("fhirStore"))
+                                if (!$util.isString(message.fhirStore))
+                                    return "fhirStore: string expected";
+                            if (message.gcsStagingDir != null && message.hasOwnProperty("gcsStagingDir"))
+                                if (!$util.isString(message.gcsStagingDir))
+                                    return "gcsStagingDir: string expected";
                             return null;
                         };
     
                         /**
-                         * Creates a SpannerSource message from a plain object. Also converts values to their respective internal types.
+                         * Creates a FhirStoreSource message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
+                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.SpannerSource} SpannerSource
+                         * @returns {google.cloud.discoveryengine.v1.FhirStoreSource} FhirStoreSource
                          */
-                        SpannerSource.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.SpannerSource)
+                        FhirStoreSource.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.FhirStoreSource)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.SpannerSource();
-                            if (object.projectId != null)
-                                message.projectId = String(object.projectId);
-                            if (object.instanceId != null)
-                                message.instanceId = String(object.instanceId);
-                            if (object.databaseId != null)
-                                message.databaseId = String(object.databaseId);
-                            if (object.tableId != null)
-                                message.tableId = String(object.tableId);
-                            if (object.enableDataBoost != null)
-                                message.enableDataBoost = Boolean(object.enableDataBoost);
+                            var message = new $root.google.cloud.discoveryengine.v1.FhirStoreSource();
+                            if (object.fhirStore != null)
+                                message.fhirStore = String(object.fhirStore);
+                            if (object.gcsStagingDir != null)
+                                message.gcsStagingDir = String(object.gcsStagingDir);
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a SpannerSource message. Also converts values to other types if specified.
+                         * Creates a plain object from a FhirStoreSource message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
+                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.SpannerSource} message SpannerSource
+                         * @param {google.cloud.discoveryengine.v1.FhirStoreSource} message FhirStoreSource
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        SpannerSource.toObject = function toObject(message, options) {
+                        FhirStoreSource.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
                             if (options.defaults) {
-                                object.projectId = "";
-                                object.instanceId = "";
-                                object.databaseId = "";
-                                object.tableId = "";
-                                object.enableDataBoost = false;
+                                object.fhirStore = "";
+                                object.gcsStagingDir = "";
                             }
-                            if (message.projectId != null && message.hasOwnProperty("projectId"))
-                                object.projectId = message.projectId;
-                            if (message.instanceId != null && message.hasOwnProperty("instanceId"))
-                                object.instanceId = message.instanceId;
-                            if (message.databaseId != null && message.hasOwnProperty("databaseId"))
-                                object.databaseId = message.databaseId;
-                            if (message.tableId != null && message.hasOwnProperty("tableId"))
-                                object.tableId = message.tableId;
-                            if (message.enableDataBoost != null && message.hasOwnProperty("enableDataBoost"))
-                                object.enableDataBoost = message.enableDataBoost;
+                            if (message.fhirStore != null && message.hasOwnProperty("fhirStore"))
+                                object.fhirStore = message.fhirStore;
+                            if (message.gcsStagingDir != null && message.hasOwnProperty("gcsStagingDir"))
+                                object.gcsStagingDir = message.gcsStagingDir;
                             return object;
                         };
     
                         /**
-                         * Converts this SpannerSource to JSON.
+                         * Converts this FhirStoreSource to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
+                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        SpannerSource.prototype.toJSON = function toJSON() {
+                        FhirStoreSource.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for SpannerSource
+                         * Gets the default type url for FhirStoreSource
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.SpannerSource
+                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        SpannerSource.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        FhirStoreSource.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.SpannerSource";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.FhirStoreSource";
                         };
     
-                        return SpannerSource;
+                        return FhirStoreSource;
                     })();
     
-                    v1.BigtableOptions = (function() {
+                    v1.CloudSqlSource = (function() {
     
                         /**
-                         * Properties of a BigtableOptions.
+                         * Properties of a CloudSqlSource.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IBigtableOptions
-                         * @property {string|null} [keyFieldName] BigtableOptions keyFieldName
-                         * @property {Object.<string,google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumnFamily>|null} [families] BigtableOptions families
+                         * @interface ICloudSqlSource
+                         * @property {string|null} [projectId] CloudSqlSource projectId
+                         * @property {string|null} [instanceId] CloudSqlSource instanceId
+                         * @property {string|null} [databaseId] CloudSqlSource databaseId
+                         * @property {string|null} [tableId] CloudSqlSource tableId
+                         * @property {string|null} [gcsStagingDir] CloudSqlSource gcsStagingDir
+                         * @property {boolean|null} [offload] CloudSqlSource offload
                          */
     
                         /**
-                         * Constructs a new BigtableOptions.
+                         * Constructs a new CloudSqlSource.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a BigtableOptions.
-                         * @implements IBigtableOptions
+                         * @classdesc Represents a CloudSqlSource.
+                         * @implements ICloudSqlSource
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IBigtableOptions=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.ICloudSqlSource=} [properties] Properties to set
                          */
-                        function BigtableOptions(properties) {
-                            this.families = {};
+                        function CloudSqlSource(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -7979,111 +11171,145 @@
                         }
     
                         /**
-                         * BigtableOptions keyFieldName.
-                         * @member {string} keyFieldName
-                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
+                         * CloudSqlSource projectId.
+                         * @member {string} projectId
+                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
                          * @instance
                          */
-                        BigtableOptions.prototype.keyFieldName = "";
+                        CloudSqlSource.prototype.projectId = "";
     
                         /**
-                         * BigtableOptions families.
-                         * @member {Object.<string,google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumnFamily>} families
-                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
+                         * CloudSqlSource instanceId.
+                         * @member {string} instanceId
+                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
                          * @instance
                          */
-                        BigtableOptions.prototype.families = $util.emptyObject;
+                        CloudSqlSource.prototype.instanceId = "";
     
                         /**
-                         * Creates a new BigtableOptions instance using the specified properties.
+                         * CloudSqlSource databaseId.
+                         * @member {string} databaseId
+                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
+                         * @instance
+                         */
+                        CloudSqlSource.prototype.databaseId = "";
+    
+                        /**
+                         * CloudSqlSource tableId.
+                         * @member {string} tableId
+                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
+                         * @instance
+                         */
+                        CloudSqlSource.prototype.tableId = "";
+    
+                        /**
+                         * CloudSqlSource gcsStagingDir.
+                         * @member {string} gcsStagingDir
+                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
+                         * @instance
+                         */
+                        CloudSqlSource.prototype.gcsStagingDir = "";
+    
+                        /**
+                         * CloudSqlSource offload.
+                         * @member {boolean} offload
+                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
+                         * @instance
+                         */
+                        CloudSqlSource.prototype.offload = false;
+    
+                        /**
+                         * Creates a new CloudSqlSource instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
+                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IBigtableOptions=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.BigtableOptions} BigtableOptions instance
+                         * @param {google.cloud.discoveryengine.v1.ICloudSqlSource=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.CloudSqlSource} CloudSqlSource instance
                          */
-                        BigtableOptions.create = function create(properties) {
-                            return new BigtableOptions(properties);
+                        CloudSqlSource.create = function create(properties) {
+                            return new CloudSqlSource(properties);
                         };
     
                         /**
-                         * Encodes the specified BigtableOptions message. Does not implicitly {@link google.cloud.discoveryengine.v1.BigtableOptions.verify|verify} messages.
+                         * Encodes the specified CloudSqlSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.CloudSqlSource.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
+                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IBigtableOptions} message BigtableOptions message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.ICloudSqlSource} message CloudSqlSource message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        BigtableOptions.encode = function encode(message, writer) {
+                        CloudSqlSource.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.keyFieldName != null && Object.hasOwnProperty.call(message, "keyFieldName"))
-                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.keyFieldName);
-                            if (message.families != null && Object.hasOwnProperty.call(message, "families"))
-                                for (var keys = Object.keys(message.families), i = 0; i < keys.length; ++i) {
-                                    writer.uint32(/* id 2, wireType 2 =*/18).fork().uint32(/* id 1, wireType 2 =*/10).string(keys[i]);
-                                    $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily.encode(message.families[keys[i]], writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim().ldelim();
-                                }
+                            if (message.projectId != null && Object.hasOwnProperty.call(message, "projectId"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.projectId);
+                            if (message.instanceId != null && Object.hasOwnProperty.call(message, "instanceId"))
+                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.instanceId);
+                            if (message.databaseId != null && Object.hasOwnProperty.call(message, "databaseId"))
+                                writer.uint32(/* id 3, wireType 2 =*/26).string(message.databaseId);
+                            if (message.tableId != null && Object.hasOwnProperty.call(message, "tableId"))
+                                writer.uint32(/* id 4, wireType 2 =*/34).string(message.tableId);
+                            if (message.gcsStagingDir != null && Object.hasOwnProperty.call(message, "gcsStagingDir"))
+                                writer.uint32(/* id 5, wireType 2 =*/42).string(message.gcsStagingDir);
+                            if (message.offload != null && Object.hasOwnProperty.call(message, "offload"))
+                                writer.uint32(/* id 6, wireType 0 =*/48).bool(message.offload);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified BigtableOptions message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.BigtableOptions.verify|verify} messages.
+                         * Encodes the specified CloudSqlSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.CloudSqlSource.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
+                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IBigtableOptions} message BigtableOptions message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.ICloudSqlSource} message CloudSqlSource message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        BigtableOptions.encodeDelimited = function encodeDelimited(message, writer) {
+                        CloudSqlSource.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a BigtableOptions message from the specified reader or buffer.
+                         * Decodes a CloudSqlSource message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
+                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.BigtableOptions} BigtableOptions
+                         * @returns {google.cloud.discoveryengine.v1.CloudSqlSource} CloudSqlSource
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        BigtableOptions.decode = function decode(reader, length) {
+                        CloudSqlSource.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.BigtableOptions(), key, value;
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.CloudSqlSource();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 1: {
-                                        message.keyFieldName = reader.string();
+                                        message.projectId = reader.string();
                                         break;
                                     }
                                 case 2: {
-                                        if (message.families === $util.emptyObject)
-                                            message.families = {};
-                                        var end2 = reader.uint32() + reader.pos;
-                                        key = "";
-                                        value = null;
-                                        while (reader.pos < end2) {
-                                            var tag2 = reader.uint32();
-                                            switch (tag2 >>> 3) {
-                                            case 1:
-                                                key = reader.string();
-                                                break;
-                                            case 2:
-                                                value = $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily.decode(reader, reader.uint32());
-                                                break;
-                                            default:
-                                                reader.skipType(tag2 & 7);
-                                                break;
-                                            }
-                                        }
-                                        message.families[key] = value;
+                                        message.instanceId = reader.string();
+                                        break;
+                                    }
+                                case 3: {
+                                        message.databaseId = reader.string();
+                                        break;
+                                    }
+                                case 4: {
+                                        message.tableId = reader.string();
+                                        break;
+                                    }
+                                case 5: {
+                                        message.gcsStagingDir = reader.string();
+                                        break;
+                                    }
+                                case 6: {
+                                        message.offload = reader.bool();
                                         break;
                                     }
                                 default:
@@ -8095,918 +11321,485 @@
                         };
     
                         /**
-                         * Decodes a BigtableOptions message from the specified reader or buffer, length delimited.
+                         * Decodes a CloudSqlSource message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
+                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.BigtableOptions} BigtableOptions
+                         * @returns {google.cloud.discoveryengine.v1.CloudSqlSource} CloudSqlSource
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        BigtableOptions.decodeDelimited = function decodeDelimited(reader) {
+                        CloudSqlSource.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a BigtableOptions message.
+                         * Verifies a CloudSqlSource message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
+                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        BigtableOptions.verify = function verify(message) {
+                        CloudSqlSource.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            if (message.keyFieldName != null && message.hasOwnProperty("keyFieldName"))
-                                if (!$util.isString(message.keyFieldName))
-                                    return "keyFieldName: string expected";
-                            if (message.families != null && message.hasOwnProperty("families")) {
-                                if (!$util.isObject(message.families))
-                                    return "families: object expected";
-                                var key = Object.keys(message.families);
-                                for (var i = 0; i < key.length; ++i) {
-                                    var error = $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily.verify(message.families[key[i]]);
-                                    if (error)
-                                        return "families." + error;
-                                }
-                            }
+                            if (message.projectId != null && message.hasOwnProperty("projectId"))
+                                if (!$util.isString(message.projectId))
+                                    return "projectId: string expected";
+                            if (message.instanceId != null && message.hasOwnProperty("instanceId"))
+                                if (!$util.isString(message.instanceId))
+                                    return "instanceId: string expected";
+                            if (message.databaseId != null && message.hasOwnProperty("databaseId"))
+                                if (!$util.isString(message.databaseId))
+                                    return "databaseId: string expected";
+                            if (message.tableId != null && message.hasOwnProperty("tableId"))
+                                if (!$util.isString(message.tableId))
+                                    return "tableId: string expected";
+                            if (message.gcsStagingDir != null && message.hasOwnProperty("gcsStagingDir"))
+                                if (!$util.isString(message.gcsStagingDir))
+                                    return "gcsStagingDir: string expected";
+                            if (message.offload != null && message.hasOwnProperty("offload"))
+                                if (typeof message.offload !== "boolean")
+                                    return "offload: boolean expected";
                             return null;
                         };
     
                         /**
-                         * Creates a BigtableOptions message from a plain object. Also converts values to their respective internal types.
+                         * Creates a CloudSqlSource message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
+                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.BigtableOptions} BigtableOptions
+                         * @returns {google.cloud.discoveryengine.v1.CloudSqlSource} CloudSqlSource
                          */
-                        BigtableOptions.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.BigtableOptions)
+                        CloudSqlSource.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.CloudSqlSource)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.BigtableOptions();
-                            if (object.keyFieldName != null)
-                                message.keyFieldName = String(object.keyFieldName);
-                            if (object.families) {
-                                if (typeof object.families !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.BigtableOptions.families: object expected");
-                                message.families = {};
-                                for (var keys = Object.keys(object.families), i = 0; i < keys.length; ++i) {
-                                    if (typeof object.families[keys[i]] !== "object")
-                                        throw TypeError(".google.cloud.discoveryengine.v1.BigtableOptions.families: object expected");
-                                    message.families[keys[i]] = $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily.fromObject(object.families[keys[i]]);
-                                }
-                            }
+                            var message = new $root.google.cloud.discoveryengine.v1.CloudSqlSource();
+                            if (object.projectId != null)
+                                message.projectId = String(object.projectId);
+                            if (object.instanceId != null)
+                                message.instanceId = String(object.instanceId);
+                            if (object.databaseId != null)
+                                message.databaseId = String(object.databaseId);
+                            if (object.tableId != null)
+                                message.tableId = String(object.tableId);
+                            if (object.gcsStagingDir != null)
+                                message.gcsStagingDir = String(object.gcsStagingDir);
+                            if (object.offload != null)
+                                message.offload = Boolean(object.offload);
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a BigtableOptions message. Also converts values to other types if specified.
+                         * Creates a plain object from a CloudSqlSource message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
+                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.BigtableOptions} message BigtableOptions
+                         * @param {google.cloud.discoveryengine.v1.CloudSqlSource} message CloudSqlSource
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        BigtableOptions.toObject = function toObject(message, options) {
+                        CloudSqlSource.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
-                            if (options.objects || options.defaults)
-                                object.families = {};
-                            if (options.defaults)
-                                object.keyFieldName = "";
-                            if (message.keyFieldName != null && message.hasOwnProperty("keyFieldName"))
-                                object.keyFieldName = message.keyFieldName;
-                            var keys2;
-                            if (message.families && (keys2 = Object.keys(message.families)).length) {
-                                object.families = {};
-                                for (var j = 0; j < keys2.length; ++j)
-                                    object.families[keys2[j]] = $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily.toObject(message.families[keys2[j]], options);
+                            if (options.defaults) {
+                                object.projectId = "";
+                                object.instanceId = "";
+                                object.databaseId = "";
+                                object.tableId = "";
+                                object.gcsStagingDir = "";
+                                object.offload = false;
                             }
+                            if (message.projectId != null && message.hasOwnProperty("projectId"))
+                                object.projectId = message.projectId;
+                            if (message.instanceId != null && message.hasOwnProperty("instanceId"))
+                                object.instanceId = message.instanceId;
+                            if (message.databaseId != null && message.hasOwnProperty("databaseId"))
+                                object.databaseId = message.databaseId;
+                            if (message.tableId != null && message.hasOwnProperty("tableId"))
+                                object.tableId = message.tableId;
+                            if (message.gcsStagingDir != null && message.hasOwnProperty("gcsStagingDir"))
+                                object.gcsStagingDir = message.gcsStagingDir;
+                            if (message.offload != null && message.hasOwnProperty("offload"))
+                                object.offload = message.offload;
                             return object;
                         };
     
                         /**
-                         * Converts this BigtableOptions to JSON.
+                         * Converts this CloudSqlSource to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
+                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        BigtableOptions.prototype.toJSON = function toJSON() {
+                        CloudSqlSource.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for BigtableOptions
+                         * Gets the default type url for CloudSqlSource
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.BigtableOptions
+                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        BigtableOptions.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        CloudSqlSource.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.BigtableOptions";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.CloudSqlSource";
                         };
     
-                        BigtableOptions.BigtableColumnFamily = (function() {
-    
-                            /**
-                             * Properties of a BigtableColumnFamily.
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions
-                             * @interface IBigtableColumnFamily
-                             * @property {string|null} [fieldName] BigtableColumnFamily fieldName
-                             * @property {google.cloud.discoveryengine.v1.BigtableOptions.Encoding|null} [encoding] BigtableColumnFamily encoding
-                             * @property {google.cloud.discoveryengine.v1.BigtableOptions.Type|null} [type] BigtableColumnFamily type
-                             * @property {Array.<google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumn>|null} [columns] BigtableColumnFamily columns
-                             */
-    
-                            /**
-                             * Constructs a new BigtableColumnFamily.
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions
-                             * @classdesc Represents a BigtableColumnFamily.
-                             * @implements IBigtableColumnFamily
-                             * @constructor
-                             * @param {google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumnFamily=} [properties] Properties to set
-                             */
-                            function BigtableColumnFamily(properties) {
-                                this.columns = [];
-                                if (properties)
-                                    for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
-                                        if (properties[keys[i]] != null)
-                                            this[keys[i]] = properties[keys[i]];
-                            }
-    
-                            /**
-                             * BigtableColumnFamily fieldName.
-                             * @member {string} fieldName
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
-                             * @instance
-                             */
-                            BigtableColumnFamily.prototype.fieldName = "";
-    
-                            /**
-                             * BigtableColumnFamily encoding.
-                             * @member {google.cloud.discoveryengine.v1.BigtableOptions.Encoding} encoding
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
-                             * @instance
-                             */
-                            BigtableColumnFamily.prototype.encoding = 0;
-    
-                            /**
-                             * BigtableColumnFamily type.
-                             * @member {google.cloud.discoveryengine.v1.BigtableOptions.Type} type
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
-                             * @instance
-                             */
-                            BigtableColumnFamily.prototype.type = 0;
-    
-                            /**
-                             * BigtableColumnFamily columns.
-                             * @member {Array.<google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumn>} columns
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
-                             * @instance
-                             */
-                            BigtableColumnFamily.prototype.columns = $util.emptyArray;
-    
-                            /**
-                             * Creates a new BigtableColumnFamily instance using the specified properties.
-                             * @function create
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
-                             * @static
-                             * @param {google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumnFamily=} [properties] Properties to set
-                             * @returns {google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily} BigtableColumnFamily instance
-                             */
-                            BigtableColumnFamily.create = function create(properties) {
-                                return new BigtableColumnFamily(properties);
-                            };
-    
-                            /**
-                             * Encodes the specified BigtableColumnFamily message. Does not implicitly {@link google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily.verify|verify} messages.
-                             * @function encode
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
-                             * @static
-                             * @param {google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumnFamily} message BigtableColumnFamily message or plain object to encode
-                             * @param {$protobuf.Writer} [writer] Writer to encode to
-                             * @returns {$protobuf.Writer} Writer
-                             */
-                            BigtableColumnFamily.encode = function encode(message, writer) {
-                                if (!writer)
-                                    writer = $Writer.create();
-                                if (message.fieldName != null && Object.hasOwnProperty.call(message, "fieldName"))
-                                    writer.uint32(/* id 1, wireType 2 =*/10).string(message.fieldName);
-                                if (message.encoding != null && Object.hasOwnProperty.call(message, "encoding"))
-                                    writer.uint32(/* id 2, wireType 0 =*/16).int32(message.encoding);
-                                if (message.type != null && Object.hasOwnProperty.call(message, "type"))
-                                    writer.uint32(/* id 3, wireType 0 =*/24).int32(message.type);
-                                if (message.columns != null && message.columns.length)
-                                    for (var i = 0; i < message.columns.length; ++i)
-                                        $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn.encode(message.columns[i], writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
-                                return writer;
-                            };
-    
-                            /**
-                             * Encodes the specified BigtableColumnFamily message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily.verify|verify} messages.
-                             * @function encodeDelimited
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
-                             * @static
-                             * @param {google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumnFamily} message BigtableColumnFamily message or plain object to encode
-                             * @param {$protobuf.Writer} [writer] Writer to encode to
-                             * @returns {$protobuf.Writer} Writer
-                             */
-                            BigtableColumnFamily.encodeDelimited = function encodeDelimited(message, writer) {
-                                return this.encode(message, writer).ldelim();
-                            };
-    
-                            /**
-                             * Decodes a BigtableColumnFamily message from the specified reader or buffer.
-                             * @function decode
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
-                             * @static
-                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                             * @param {number} [length] Message length if known beforehand
-                             * @returns {google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily} BigtableColumnFamily
-                             * @throws {Error} If the payload is not a reader or valid buffer
-                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                             */
-                            BigtableColumnFamily.decode = function decode(reader, length) {
-                                if (!(reader instanceof $Reader))
-                                    reader = $Reader.create(reader);
-                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily();
-                                while (reader.pos < end) {
-                                    var tag = reader.uint32();
-                                    switch (tag >>> 3) {
-                                    case 1: {
-                                            message.fieldName = reader.string();
-                                            break;
-                                        }
-                                    case 2: {
-                                            message.encoding = reader.int32();
-                                            break;
-                                        }
-                                    case 3: {
-                                            message.type = reader.int32();
-                                            break;
-                                        }
-                                    case 4: {
-                                            if (!(message.columns && message.columns.length))
-                                                message.columns = [];
-                                            message.columns.push($root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn.decode(reader, reader.uint32()));
-                                            break;
-                                        }
-                                    default:
-                                        reader.skipType(tag & 7);
-                                        break;
-                                    }
-                                }
-                                return message;
-                            };
-    
-                            /**
-                             * Decodes a BigtableColumnFamily message from the specified reader or buffer, length delimited.
-                             * @function decodeDelimited
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
-                             * @static
-                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                             * @returns {google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily} BigtableColumnFamily
-                             * @throws {Error} If the payload is not a reader or valid buffer
-                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                             */
-                            BigtableColumnFamily.decodeDelimited = function decodeDelimited(reader) {
-                                if (!(reader instanceof $Reader))
-                                    reader = new $Reader(reader);
-                                return this.decode(reader, reader.uint32());
-                            };
-    
-                            /**
-                             * Verifies a BigtableColumnFamily message.
-                             * @function verify
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
-                             * @static
-                             * @param {Object.<string,*>} message Plain object to verify
-                             * @returns {string|null} `null` if valid, otherwise the reason why it is not
-                             */
-                            BigtableColumnFamily.verify = function verify(message) {
-                                if (typeof message !== "object" || message === null)
-                                    return "object expected";
-                                if (message.fieldName != null && message.hasOwnProperty("fieldName"))
-                                    if (!$util.isString(message.fieldName))
-                                        return "fieldName: string expected";
-                                if (message.encoding != null && message.hasOwnProperty("encoding"))
-                                    switch (message.encoding) {
-                                    default:
-                                        return "encoding: enum value expected";
-                                    case 0:
-                                    case 1:
-                                    case 2:
-                                        break;
-                                    }
-                                if (message.type != null && message.hasOwnProperty("type"))
-                                    switch (message.type) {
-                                    default:
-                                        return "type: enum value expected";
-                                    case 0:
-                                    case 1:
-                                    case 2:
-                                    case 3:
-                                    case 4:
-                                    case 5:
-                                    case 6:
-                                    case 7:
-                                        break;
-                                    }
-                                if (message.columns != null && message.hasOwnProperty("columns")) {
-                                    if (!Array.isArray(message.columns))
-                                        return "columns: array expected";
-                                    for (var i = 0; i < message.columns.length; ++i) {
-                                        var error = $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn.verify(message.columns[i]);
-                                        if (error)
-                                            return "columns." + error;
-                                    }
-                                }
-                                return null;
-                            };
-    
-                            /**
-                             * Creates a BigtableColumnFamily message from a plain object. Also converts values to their respective internal types.
-                             * @function fromObject
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
-                             * @static
-                             * @param {Object.<string,*>} object Plain object
-                             * @returns {google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily} BigtableColumnFamily
-                             */
-                            BigtableColumnFamily.fromObject = function fromObject(object) {
-                                if (object instanceof $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily)
-                                    return object;
-                                var message = new $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily();
-                                if (object.fieldName != null)
-                                    message.fieldName = String(object.fieldName);
-                                switch (object.encoding) {
-                                default:
-                                    if (typeof object.encoding === "number") {
-                                        message.encoding = object.encoding;
-                                        break;
-                                    }
-                                    break;
-                                case "ENCODING_UNSPECIFIED":
-                                case 0:
-                                    message.encoding = 0;
-                                    break;
-                                case "TEXT":
-                                case 1:
-                                    message.encoding = 1;
-                                    break;
-                                case "BINARY":
-                                case 2:
-                                    message.encoding = 2;
-                                    break;
-                                }
-                                switch (object.type) {
-                                default:
-                                    if (typeof object.type === "number") {
-                                        message.type = object.type;
-                                        break;
-                                    }
-                                    break;
-                                case "TYPE_UNSPECIFIED":
-                                case 0:
-                                    message.type = 0;
-                                    break;
-                                case "STRING":
-                                case 1:
-                                    message.type = 1;
-                                    break;
-                                case "NUMBER":
-                                case 2:
-                                    message.type = 2;
-                                    break;
-                                case "INTEGER":
-                                case 3:
-                                    message.type = 3;
-                                    break;
-                                case "VAR_INTEGER":
-                                case 4:
-                                    message.type = 4;
-                                    break;
-                                case "BIG_NUMERIC":
-                                case 5:
-                                    message.type = 5;
-                                    break;
-                                case "BOOLEAN":
-                                case 6:
-                                    message.type = 6;
-                                    break;
-                                case "JSON":
-                                case 7:
-                                    message.type = 7;
-                                    break;
-                                }
-                                if (object.columns) {
-                                    if (!Array.isArray(object.columns))
-                                        throw TypeError(".google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily.columns: array expected");
-                                    message.columns = [];
-                                    for (var i = 0; i < object.columns.length; ++i) {
-                                        if (typeof object.columns[i] !== "object")
-                                            throw TypeError(".google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily.columns: object expected");
-                                        message.columns[i] = $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn.fromObject(object.columns[i]);
-                                    }
-                                }
-                                return message;
-                            };
-    
-                            /**
-                             * Creates a plain object from a BigtableColumnFamily message. Also converts values to other types if specified.
-                             * @function toObject
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
-                             * @static
-                             * @param {google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily} message BigtableColumnFamily
-                             * @param {$protobuf.IConversionOptions} [options] Conversion options
-                             * @returns {Object.<string,*>} Plain object
-                             */
-                            BigtableColumnFamily.toObject = function toObject(message, options) {
-                                if (!options)
-                                    options = {};
-                                var object = {};
-                                if (options.arrays || options.defaults)
-                                    object.columns = [];
-                                if (options.defaults) {
-                                    object.fieldName = "";
-                                    object.encoding = options.enums === String ? "ENCODING_UNSPECIFIED" : 0;
-                                    object.type = options.enums === String ? "TYPE_UNSPECIFIED" : 0;
-                                }
-                                if (message.fieldName != null && message.hasOwnProperty("fieldName"))
-                                    object.fieldName = message.fieldName;
-                                if (message.encoding != null && message.hasOwnProperty("encoding"))
-                                    object.encoding = options.enums === String ? $root.google.cloud.discoveryengine.v1.BigtableOptions.Encoding[message.encoding] === undefined ? message.encoding : $root.google.cloud.discoveryengine.v1.BigtableOptions.Encoding[message.encoding] : message.encoding;
-                                if (message.type != null && message.hasOwnProperty("type"))
-                                    object.type = options.enums === String ? $root.google.cloud.discoveryengine.v1.BigtableOptions.Type[message.type] === undefined ? message.type : $root.google.cloud.discoveryengine.v1.BigtableOptions.Type[message.type] : message.type;
-                                if (message.columns && message.columns.length) {
-                                    object.columns = [];
-                                    for (var j = 0; j < message.columns.length; ++j)
-                                        object.columns[j] = $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn.toObject(message.columns[j], options);
-                                }
-                                return object;
-                            };
-    
-                            /**
-                             * Converts this BigtableColumnFamily to JSON.
-                             * @function toJSON
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
-                             * @instance
-                             * @returns {Object.<string,*>} JSON object
-                             */
-                            BigtableColumnFamily.prototype.toJSON = function toJSON() {
-                                return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
-                            };
-    
-                            /**
-                             * Gets the default type url for BigtableColumnFamily
-                             * @function getTypeUrl
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily
-                             * @static
-                             * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                             * @returns {string} The default type url
-                             */
-                            BigtableColumnFamily.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
-                                if (typeUrlPrefix === undefined) {
-                                    typeUrlPrefix = "type.googleapis.com";
-                                }
-                                return typeUrlPrefix + "/google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumnFamily";
-                            };
+                        return CloudSqlSource;
+                    })();
     
-                            return BigtableColumnFamily;
-                        })();
+                    v1.AlloyDbSource = (function() {
     
-                        BigtableOptions.BigtableColumn = (function() {
+                        /**
+                         * Properties of an AlloyDbSource.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @interface IAlloyDbSource
+                         * @property {string|null} [projectId] AlloyDbSource projectId
+                         * @property {string|null} [locationId] AlloyDbSource locationId
+                         * @property {string|null} [clusterId] AlloyDbSource clusterId
+                         * @property {string|null} [databaseId] AlloyDbSource databaseId
+                         * @property {string|null} [tableId] AlloyDbSource tableId
+                         * @property {string|null} [gcsStagingDir] AlloyDbSource gcsStagingDir
+                         */
     
-                            /**
-                             * Properties of a BigtableColumn.
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions
-                             * @interface IBigtableColumn
-                             * @property {Uint8Array|null} [qualifier] BigtableColumn qualifier
-                             * @property {string|null} [fieldName] BigtableColumn fieldName
-                             * @property {google.cloud.discoveryengine.v1.BigtableOptions.Encoding|null} [encoding] BigtableColumn encoding
-                             * @property {google.cloud.discoveryengine.v1.BigtableOptions.Type|null} [type] BigtableColumn type
-                             */
+                        /**
+                         * Constructs a new AlloyDbSource.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @classdesc Represents an AlloyDbSource.
+                         * @implements IAlloyDbSource
+                         * @constructor
+                         * @param {google.cloud.discoveryengine.v1.IAlloyDbSource=} [properties] Properties to set
+                         */
+                        function AlloyDbSource(properties) {
+                            if (properties)
+                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                    if (properties[keys[i]] != null)
+                                        this[keys[i]] = properties[keys[i]];
+                        }
     
-                            /**
-                             * Constructs a new BigtableColumn.
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions
-                             * @classdesc Represents a BigtableColumn.
-                             * @implements IBigtableColumn
-                             * @constructor
-                             * @param {google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumn=} [properties] Properties to set
-                             */
-                            function BigtableColumn(properties) {
-                                if (properties)
-                                    for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
-                                        if (properties[keys[i]] != null)
-                                            this[keys[i]] = properties[keys[i]];
-                            }
+                        /**
+                         * AlloyDbSource projectId.
+                         * @member {string} projectId
+                         * @memberof google.cloud.discoveryengine.v1.AlloyDbSource
+                         * @instance
+                         */
+                        AlloyDbSource.prototype.projectId = "";
     
-                            /**
-                             * BigtableColumn qualifier.
-                             * @member {Uint8Array} qualifier
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
-                             * @instance
-                             */
-                            BigtableColumn.prototype.qualifier = $util.newBuffer([]);
+                        /**
+                         * AlloyDbSource locationId.
+                         * @member {string} locationId
+                         * @memberof google.cloud.discoveryengine.v1.AlloyDbSource
+                         * @instance
+                         */
+                        AlloyDbSource.prototype.locationId = "";
     
-                            /**
-                             * BigtableColumn fieldName.
-                             * @member {string} fieldName
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
-                             * @instance
-                             */
-                            BigtableColumn.prototype.fieldName = "";
+                        /**
+                         * AlloyDbSource clusterId.
+                         * @member {string} clusterId
+                         * @memberof google.cloud.discoveryengine.v1.AlloyDbSource
+                         * @instance
+                         */
+                        AlloyDbSource.prototype.clusterId = "";
     
-                            /**
-                             * BigtableColumn encoding.
-                             * @member {google.cloud.discoveryengine.v1.BigtableOptions.Encoding} encoding
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
-                             * @instance
-                             */
-                            BigtableColumn.prototype.encoding = 0;
+                        /**
+                         * AlloyDbSource databaseId.
+                         * @member {string} databaseId
+                         * @memberof google.cloud.discoveryengine.v1.AlloyDbSource
+                         * @instance
+                         */
+                        AlloyDbSource.prototype.databaseId = "";
     
-                            /**
-                             * BigtableColumn type.
-                             * @member {google.cloud.discoveryengine.v1.BigtableOptions.Type} type
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
-                             * @instance
-                             */
-                            BigtableColumn.prototype.type = 0;
+                        /**
+                         * AlloyDbSource tableId.
+                         * @member {string} tableId
+                         * @memberof google.cloud.discoveryengine.v1.AlloyDbSource
+                         * @instance
+                         */
+                        AlloyDbSource.prototype.tableId = "";
     
-                            /**
-                             * Creates a new BigtableColumn instance using the specified properties.
-                             * @function create
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
-                             * @static
-                             * @param {google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumn=} [properties] Properties to set
-                             * @returns {google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn} BigtableColumn instance
-                             */
-                            BigtableColumn.create = function create(properties) {
-                                return new BigtableColumn(properties);
-                            };
+                        /**
+                         * AlloyDbSource gcsStagingDir.
+                         * @member {string} gcsStagingDir
+                         * @memberof google.cloud.discoveryengine.v1.AlloyDbSource
+                         * @instance
+                         */
+                        AlloyDbSource.prototype.gcsStagingDir = "";
     
-                            /**
-                             * Encodes the specified BigtableColumn message. Does not implicitly {@link google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn.verify|verify} messages.
-                             * @function encode
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
-                             * @static
-                             * @param {google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumn} message BigtableColumn message or plain object to encode
-                             * @param {$protobuf.Writer} [writer] Writer to encode to
-                             * @returns {$protobuf.Writer} Writer
-                             */
-                            BigtableColumn.encode = function encode(message, writer) {
-                                if (!writer)
-                                    writer = $Writer.create();
-                                if (message.qualifier != null && Object.hasOwnProperty.call(message, "qualifier"))
-                                    writer.uint32(/* id 1, wireType 2 =*/10).bytes(message.qualifier);
-                                if (message.fieldName != null && Object.hasOwnProperty.call(message, "fieldName"))
-                                    writer.uint32(/* id 2, wireType 2 =*/18).string(message.fieldName);
-                                if (message.encoding != null && Object.hasOwnProperty.call(message, "encoding"))
-                                    writer.uint32(/* id 3, wireType 0 =*/24).int32(message.encoding);
-                                if (message.type != null && Object.hasOwnProperty.call(message, "type"))
-                                    writer.uint32(/* id 4, wireType 0 =*/32).int32(message.type);
-                                return writer;
-                            };
+                        /**
+                         * Creates a new AlloyDbSource instance using the specified properties.
+                         * @function create
+                         * @memberof google.cloud.discoveryengine.v1.AlloyDbSource
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.IAlloyDbSource=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.AlloyDbSource} AlloyDbSource instance
+                         */
+                        AlloyDbSource.create = function create(properties) {
+                            return new AlloyDbSource(properties);
+                        };
     
-                            /**
-                             * Encodes the specified BigtableColumn message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn.verify|verify} messages.
-                             * @function encodeDelimited
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
-                             * @static
-                             * @param {google.cloud.discoveryengine.v1.BigtableOptions.IBigtableColumn} message BigtableColumn message or plain object to encode
-                             * @param {$protobuf.Writer} [writer] Writer to encode to
-                             * @returns {$protobuf.Writer} Writer
-                             */
-                            BigtableColumn.encodeDelimited = function encodeDelimited(message, writer) {
-                                return this.encode(message, writer).ldelim();
-                            };
+                        /**
+                         * Encodes the specified AlloyDbSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.AlloyDbSource.verify|verify} messages.
+                         * @function encode
+                         * @memberof google.cloud.discoveryengine.v1.AlloyDbSource
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.IAlloyDbSource} message AlloyDbSource message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        AlloyDbSource.encode = function encode(message, writer) {
+                            if (!writer)
+                                writer = $Writer.create();
+                            if (message.projectId != null && Object.hasOwnProperty.call(message, "projectId"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.projectId);
+                            if (message.locationId != null && Object.hasOwnProperty.call(message, "locationId"))
+                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.locationId);
+                            if (message.clusterId != null && Object.hasOwnProperty.call(message, "clusterId"))
+                                writer.uint32(/* id 3, wireType 2 =*/26).string(message.clusterId);
+                            if (message.databaseId != null && Object.hasOwnProperty.call(message, "databaseId"))
+                                writer.uint32(/* id 4, wireType 2 =*/34).string(message.databaseId);
+                            if (message.tableId != null && Object.hasOwnProperty.call(message, "tableId"))
+                                writer.uint32(/* id 5, wireType 2 =*/42).string(message.tableId);
+                            if (message.gcsStagingDir != null && Object.hasOwnProperty.call(message, "gcsStagingDir"))
+                                writer.uint32(/* id 6, wireType 2 =*/50).string(message.gcsStagingDir);
+                            return writer;
+                        };
     
-                            /**
-                             * Decodes a BigtableColumn message from the specified reader or buffer.
-                             * @function decode
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
-                             * @static
-                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                             * @param {number} [length] Message length if known beforehand
-                             * @returns {google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn} BigtableColumn
-                             * @throws {Error} If the payload is not a reader or valid buffer
-                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                             */
-                            BigtableColumn.decode = function decode(reader, length) {
-                                if (!(reader instanceof $Reader))
-                                    reader = $Reader.create(reader);
-                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn();
-                                while (reader.pos < end) {
-                                    var tag = reader.uint32();
-                                    switch (tag >>> 3) {
-                                    case 1: {
-                                            message.qualifier = reader.bytes();
-                                            break;
-                                        }
-                                    case 2: {
-                                            message.fieldName = reader.string();
-                                            break;
-                                        }
-                                    case 3: {
-                                            message.encoding = reader.int32();
-                                            break;
-                                        }
-                                    case 4: {
-                                            message.type = reader.int32();
-                                            break;
-                                        }
-                                    default:
-                                        reader.skipType(tag & 7);
+                        /**
+                         * Encodes the specified AlloyDbSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.AlloyDbSource.verify|verify} messages.
+                         * @function encodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.AlloyDbSource
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.IAlloyDbSource} message AlloyDbSource message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        AlloyDbSource.encodeDelimited = function encodeDelimited(message, writer) {
+                            return this.encode(message, writer).ldelim();
+                        };
+    
+                        /**
+                         * Decodes an AlloyDbSource message from the specified reader or buffer.
+                         * @function decode
+                         * @memberof google.cloud.discoveryengine.v1.AlloyDbSource
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @param {number} [length] Message length if known beforehand
+                         * @returns {google.cloud.discoveryengine.v1.AlloyDbSource} AlloyDbSource
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        AlloyDbSource.decode = function decode(reader, length) {
+                            if (!(reader instanceof $Reader))
+                                reader = $Reader.create(reader);
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.AlloyDbSource();
+                            while (reader.pos < end) {
+                                var tag = reader.uint32();
+                                switch (tag >>> 3) {
+                                case 1: {
+                                        message.projectId = reader.string();
                                         break;
                                     }
-                                }
-                                return message;
-                            };
-    
-                            /**
-                             * Decodes a BigtableColumn message from the specified reader or buffer, length delimited.
-                             * @function decodeDelimited
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
-                             * @static
-                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                             * @returns {google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn} BigtableColumn
-                             * @throws {Error} If the payload is not a reader or valid buffer
-                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                             */
-                            BigtableColumn.decodeDelimited = function decodeDelimited(reader) {
-                                if (!(reader instanceof $Reader))
-                                    reader = new $Reader(reader);
-                                return this.decode(reader, reader.uint32());
-                            };
-    
-                            /**
-                             * Verifies a BigtableColumn message.
-                             * @function verify
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
-                             * @static
-                             * @param {Object.<string,*>} message Plain object to verify
-                             * @returns {string|null} `null` if valid, otherwise the reason why it is not
-                             */
-                            BigtableColumn.verify = function verify(message) {
-                                if (typeof message !== "object" || message === null)
-                                    return "object expected";
-                                if (message.qualifier != null && message.hasOwnProperty("qualifier"))
-                                    if (!(message.qualifier && typeof message.qualifier.length === "number" || $util.isString(message.qualifier)))
-                                        return "qualifier: buffer expected";
-                                if (message.fieldName != null && message.hasOwnProperty("fieldName"))
-                                    if (!$util.isString(message.fieldName))
-                                        return "fieldName: string expected";
-                                if (message.encoding != null && message.hasOwnProperty("encoding"))
-                                    switch (message.encoding) {
-                                    default:
-                                        return "encoding: enum value expected";
-                                    case 0:
-                                    case 1:
-                                    case 2:
+                                case 2: {
+                                        message.locationId = reader.string();
                                         break;
                                     }
-                                if (message.type != null && message.hasOwnProperty("type"))
-                                    switch (message.type) {
-                                    default:
-                                        return "type: enum value expected";
-                                    case 0:
-                                    case 1:
-                                    case 2:
-                                    case 3:
-                                    case 4:
-                                    case 5:
-                                    case 6:
-                                    case 7:
+                                case 3: {
+                                        message.clusterId = reader.string();
                                         break;
                                     }
-                                return null;
-                            };
-    
-                            /**
-                             * Creates a BigtableColumn message from a plain object. Also converts values to their respective internal types.
-                             * @function fromObject
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
-                             * @static
-                             * @param {Object.<string,*>} object Plain object
-                             * @returns {google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn} BigtableColumn
-                             */
-                            BigtableColumn.fromObject = function fromObject(object) {
-                                if (object instanceof $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn)
-                                    return object;
-                                var message = new $root.google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn();
-                                if (object.qualifier != null)
-                                    if (typeof object.qualifier === "string")
-                                        $util.base64.decode(object.qualifier, message.qualifier = $util.newBuffer($util.base64.length(object.qualifier)), 0);
-                                    else if (object.qualifier.length >= 0)
-                                        message.qualifier = object.qualifier;
-                                if (object.fieldName != null)
-                                    message.fieldName = String(object.fieldName);
-                                switch (object.encoding) {
-                                default:
-                                    if (typeof object.encoding === "number") {
-                                        message.encoding = object.encoding;
+                                case 4: {
+                                        message.databaseId = reader.string();
                                         break;
                                     }
-                                    break;
-                                case "ENCODING_UNSPECIFIED":
-                                case 0:
-                                    message.encoding = 0;
-                                    break;
-                                case "TEXT":
-                                case 1:
-                                    message.encoding = 1;
-                                    break;
-                                case "BINARY":
-                                case 2:
-                                    message.encoding = 2;
-                                    break;
-                                }
-                                switch (object.type) {
-                                default:
-                                    if (typeof object.type === "number") {
-                                        message.type = object.type;
+                                case 5: {
+                                        message.tableId = reader.string();
                                         break;
                                     }
-                                    break;
-                                case "TYPE_UNSPECIFIED":
-                                case 0:
-                                    message.type = 0;
-                                    break;
-                                case "STRING":
-                                case 1:
-                                    message.type = 1;
-                                    break;
-                                case "NUMBER":
-                                case 2:
-                                    message.type = 2;
-                                    break;
-                                case "INTEGER":
-                                case 3:
-                                    message.type = 3;
-                                    break;
-                                case "VAR_INTEGER":
-                                case 4:
-                                    message.type = 4;
-                                    break;
-                                case "BIG_NUMERIC":
-                                case 5:
-                                    message.type = 5;
-                                    break;
-                                case "BOOLEAN":
-                                case 6:
-                                    message.type = 6;
-                                    break;
-                                case "JSON":
-                                case 7:
-                                    message.type = 7;
+                                case 6: {
+                                        message.gcsStagingDir = reader.string();
+                                        break;
+                                    }
+                                default:
+                                    reader.skipType(tag & 7);
                                     break;
                                 }
-                                return message;
-                            };
+                            }
+                            return message;
+                        };
     
-                            /**
-                             * Creates a plain object from a BigtableColumn message. Also converts values to other types if specified.
-                             * @function toObject
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
-                             * @static
-                             * @param {google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn} message BigtableColumn
-                             * @param {$protobuf.IConversionOptions} [options] Conversion options
-                             * @returns {Object.<string,*>} Plain object
-                             */
-                            BigtableColumn.toObject = function toObject(message, options) {
-                                if (!options)
-                                    options = {};
-                                var object = {};
-                                if (options.defaults) {
-                                    if (options.bytes === String)
-                                        object.qualifier = "";
-                                    else {
-                                        object.qualifier = [];
-                                        if (options.bytes !== Array)
-                                            object.qualifier = $util.newBuffer(object.qualifier);
-                                    }
-                                    object.fieldName = "";
-                                    object.encoding = options.enums === String ? "ENCODING_UNSPECIFIED" : 0;
-                                    object.type = options.enums === String ? "TYPE_UNSPECIFIED" : 0;
-                                }
-                                if (message.qualifier != null && message.hasOwnProperty("qualifier"))
-                                    object.qualifier = options.bytes === String ? $util.base64.encode(message.qualifier, 0, message.qualifier.length) : options.bytes === Array ? Array.prototype.slice.call(message.qualifier) : message.qualifier;
-                                if (message.fieldName != null && message.hasOwnProperty("fieldName"))
-                                    object.fieldName = message.fieldName;
-                                if (message.encoding != null && message.hasOwnProperty("encoding"))
-                                    object.encoding = options.enums === String ? $root.google.cloud.discoveryengine.v1.BigtableOptions.Encoding[message.encoding] === undefined ? message.encoding : $root.google.cloud.discoveryengine.v1.BigtableOptions.Encoding[message.encoding] : message.encoding;
-                                if (message.type != null && message.hasOwnProperty("type"))
-                                    object.type = options.enums === String ? $root.google.cloud.discoveryengine.v1.BigtableOptions.Type[message.type] === undefined ? message.type : $root.google.cloud.discoveryengine.v1.BigtableOptions.Type[message.type] : message.type;
-                                return object;
-                            };
+                        /**
+                         * Decodes an AlloyDbSource message from the specified reader or buffer, length delimited.
+                         * @function decodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.AlloyDbSource
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @returns {google.cloud.discoveryengine.v1.AlloyDbSource} AlloyDbSource
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        AlloyDbSource.decodeDelimited = function decodeDelimited(reader) {
+                            if (!(reader instanceof $Reader))
+                                reader = new $Reader(reader);
+                            return this.decode(reader, reader.uint32());
+                        };
     
-                            /**
-                             * Converts this BigtableColumn to JSON.
-                             * @function toJSON
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
-                             * @instance
-                             * @returns {Object.<string,*>} JSON object
-                             */
-                            BigtableColumn.prototype.toJSON = function toJSON() {
-                                return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
-                            };
+                        /**
+                         * Verifies an AlloyDbSource message.
+                         * @function verify
+                         * @memberof google.cloud.discoveryengine.v1.AlloyDbSource
+                         * @static
+                         * @param {Object.<string,*>} message Plain object to verify
+                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                         */
+                        AlloyDbSource.verify = function verify(message) {
+                            if (typeof message !== "object" || message === null)
+                                return "object expected";
+                            if (message.projectId != null && message.hasOwnProperty("projectId"))
+                                if (!$util.isString(message.projectId))
+                                    return "projectId: string expected";
+                            if (message.locationId != null && message.hasOwnProperty("locationId"))
+                                if (!$util.isString(message.locationId))
+                                    return "locationId: string expected";
+                            if (message.clusterId != null && message.hasOwnProperty("clusterId"))
+                                if (!$util.isString(message.clusterId))
+                                    return "clusterId: string expected";
+                            if (message.databaseId != null && message.hasOwnProperty("databaseId"))
+                                if (!$util.isString(message.databaseId))
+                                    return "databaseId: string expected";
+                            if (message.tableId != null && message.hasOwnProperty("tableId"))
+                                if (!$util.isString(message.tableId))
+                                    return "tableId: string expected";
+                            if (message.gcsStagingDir != null && message.hasOwnProperty("gcsStagingDir"))
+                                if (!$util.isString(message.gcsStagingDir))
+                                    return "gcsStagingDir: string expected";
+                            return null;
+                        };
     
-                            /**
-                             * Gets the default type url for BigtableColumn
-                             * @function getTypeUrl
-                             * @memberof google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn
-                             * @static
-                             * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                             * @returns {string} The default type url
-                             */
-                            BigtableColumn.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
-                                if (typeUrlPrefix === undefined) {
-                                    typeUrlPrefix = "type.googleapis.com";
-                                }
-                                return typeUrlPrefix + "/google.cloud.discoveryengine.v1.BigtableOptions.BigtableColumn";
-                            };
+                        /**
+                         * Creates an AlloyDbSource message from a plain object. Also converts values to their respective internal types.
+                         * @function fromObject
+                         * @memberof google.cloud.discoveryengine.v1.AlloyDbSource
+                         * @static
+                         * @param {Object.<string,*>} object Plain object
+                         * @returns {google.cloud.discoveryengine.v1.AlloyDbSource} AlloyDbSource
+                         */
+                        AlloyDbSource.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.AlloyDbSource)
+                                return object;
+                            var message = new $root.google.cloud.discoveryengine.v1.AlloyDbSource();
+                            if (object.projectId != null)
+                                message.projectId = String(object.projectId);
+                            if (object.locationId != null)
+                                message.locationId = String(object.locationId);
+                            if (object.clusterId != null)
+                                message.clusterId = String(object.clusterId);
+                            if (object.databaseId != null)
+                                message.databaseId = String(object.databaseId);
+                            if (object.tableId != null)
+                                message.tableId = String(object.tableId);
+                            if (object.gcsStagingDir != null)
+                                message.gcsStagingDir = String(object.gcsStagingDir);
+                            return message;
+                        };
     
-                            return BigtableColumn;
-                        })();
+                        /**
+                         * Creates a plain object from an AlloyDbSource message. Also converts values to other types if specified.
+                         * @function toObject
+                         * @memberof google.cloud.discoveryengine.v1.AlloyDbSource
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.AlloyDbSource} message AlloyDbSource
+                         * @param {$protobuf.IConversionOptions} [options] Conversion options
+                         * @returns {Object.<string,*>} Plain object
+                         */
+                        AlloyDbSource.toObject = function toObject(message, options) {
+                            if (!options)
+                                options = {};
+                            var object = {};
+                            if (options.defaults) {
+                                object.projectId = "";
+                                object.locationId = "";
+                                object.clusterId = "";
+                                object.databaseId = "";
+                                object.tableId = "";
+                                object.gcsStagingDir = "";
+                            }
+                            if (message.projectId != null && message.hasOwnProperty("projectId"))
+                                object.projectId = message.projectId;
+                            if (message.locationId != null && message.hasOwnProperty("locationId"))
+                                object.locationId = message.locationId;
+                            if (message.clusterId != null && message.hasOwnProperty("clusterId"))
+                                object.clusterId = message.clusterId;
+                            if (message.databaseId != null && message.hasOwnProperty("databaseId"))
+                                object.databaseId = message.databaseId;
+                            if (message.tableId != null && message.hasOwnProperty("tableId"))
+                                object.tableId = message.tableId;
+                            if (message.gcsStagingDir != null && message.hasOwnProperty("gcsStagingDir"))
+                                object.gcsStagingDir = message.gcsStagingDir;
+                            return object;
+                        };
     
                         /**
-                         * Type enum.
-                         * @name google.cloud.discoveryengine.v1.BigtableOptions.Type
-                         * @enum {number}
-                         * @property {number} TYPE_UNSPECIFIED=0 TYPE_UNSPECIFIED value
-                         * @property {number} STRING=1 STRING value
-                         * @property {number} NUMBER=2 NUMBER value
-                         * @property {number} INTEGER=3 INTEGER value
-                         * @property {number} VAR_INTEGER=4 VAR_INTEGER value
-                         * @property {number} BIG_NUMERIC=5 BIG_NUMERIC value
-                         * @property {number} BOOLEAN=6 BOOLEAN value
-                         * @property {number} JSON=7 JSON value
+                         * Converts this AlloyDbSource to JSON.
+                         * @function toJSON
+                         * @memberof google.cloud.discoveryengine.v1.AlloyDbSource
+                         * @instance
+                         * @returns {Object.<string,*>} JSON object
                          */
-                        BigtableOptions.Type = (function() {
-                            var valuesById = {}, values = Object.create(valuesById);
-                            values[valuesById[0] = "TYPE_UNSPECIFIED"] = 0;
-                            values[valuesById[1] = "STRING"] = 1;
-                            values[valuesById[2] = "NUMBER"] = 2;
-                            values[valuesById[3] = "INTEGER"] = 3;
-                            values[valuesById[4] = "VAR_INTEGER"] = 4;
-                            values[valuesById[5] = "BIG_NUMERIC"] = 5;
-                            values[valuesById[6] = "BOOLEAN"] = 6;
-                            values[valuesById[7] = "JSON"] = 7;
-                            return values;
-                        })();
+                        AlloyDbSource.prototype.toJSON = function toJSON() {
+                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                        };
     
                         /**
-                         * Encoding enum.
-                         * @name google.cloud.discoveryengine.v1.BigtableOptions.Encoding
-                         * @enum {number}
-                         * @property {number} ENCODING_UNSPECIFIED=0 ENCODING_UNSPECIFIED value
-                         * @property {number} TEXT=1 TEXT value
-                         * @property {number} BINARY=2 BINARY value
+                         * Gets the default type url for AlloyDbSource
+                         * @function getTypeUrl
+                         * @memberof google.cloud.discoveryengine.v1.AlloyDbSource
+                         * @static
+                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns {string} The default type url
                          */
-                        BigtableOptions.Encoding = (function() {
-                            var valuesById = {}, values = Object.create(valuesById);
-                            values[valuesById[0] = "ENCODING_UNSPECIFIED"] = 0;
-                            values[valuesById[1] = "TEXT"] = 1;
-                            values[valuesById[2] = "BINARY"] = 2;
-                            return values;
-                        })();
+                        AlloyDbSource.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                            if (typeUrlPrefix === undefined) {
+                                typeUrlPrefix = "type.googleapis.com";
+                            }
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.AlloyDbSource";
+                        };
     
-                        return BigtableOptions;
+                        return AlloyDbSource;
                     })();
     
-                    v1.BigtableSource = (function() {
+                    v1.FirestoreSource = (function() {
     
                         /**
-                         * Properties of a BigtableSource.
+                         * Properties of a FirestoreSource.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IBigtableSource
-                         * @property {string|null} [projectId] BigtableSource projectId
-                         * @property {string|null} [instanceId] BigtableSource instanceId
-                         * @property {string|null} [tableId] BigtableSource tableId
-                         * @property {google.cloud.discoveryengine.v1.IBigtableOptions|null} [bigtableOptions] BigtableSource bigtableOptions
+                         * @interface IFirestoreSource
+                         * @property {string|null} [projectId] FirestoreSource projectId
+                         * @property {string|null} [databaseId] FirestoreSource databaseId
+                         * @property {string|null} [collectionId] FirestoreSource collectionId
+                         * @property {string|null} [gcsStagingDir] FirestoreSource gcsStagingDir
                          */
     
                         /**
-                         * Constructs a new BigtableSource.
+                         * Constructs a new FirestoreSource.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a BigtableSource.
-                         * @implements IBigtableSource
+                         * @classdesc Represents a FirestoreSource.
+                         * @implements IFirestoreSource
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IBigtableSource=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IFirestoreSource=} [properties] Properties to set
                          */
-                        function BigtableSource(properties) {
+                        function FirestoreSource(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -9014,100 +11807,100 @@
                         }
     
                         /**
-                         * BigtableSource projectId.
+                         * FirestoreSource projectId.
                          * @member {string} projectId
-                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
+                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
                          * @instance
                          */
-                        BigtableSource.prototype.projectId = "";
+                        FirestoreSource.prototype.projectId = "";
     
                         /**
-                         * BigtableSource instanceId.
-                         * @member {string} instanceId
-                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
+                         * FirestoreSource databaseId.
+                         * @member {string} databaseId
+                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
                          * @instance
                          */
-                        BigtableSource.prototype.instanceId = "";
+                        FirestoreSource.prototype.databaseId = "";
     
                         /**
-                         * BigtableSource tableId.
-                         * @member {string} tableId
-                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
+                         * FirestoreSource collectionId.
+                         * @member {string} collectionId
+                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
                          * @instance
                          */
-                        BigtableSource.prototype.tableId = "";
+                        FirestoreSource.prototype.collectionId = "";
     
                         /**
-                         * BigtableSource bigtableOptions.
-                         * @member {google.cloud.discoveryengine.v1.IBigtableOptions|null|undefined} bigtableOptions
-                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
+                         * FirestoreSource gcsStagingDir.
+                         * @member {string} gcsStagingDir
+                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
                          * @instance
                          */
-                        BigtableSource.prototype.bigtableOptions = null;
+                        FirestoreSource.prototype.gcsStagingDir = "";
     
                         /**
-                         * Creates a new BigtableSource instance using the specified properties.
+                         * Creates a new FirestoreSource instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
+                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IBigtableSource=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.BigtableSource} BigtableSource instance
+                         * @param {google.cloud.discoveryengine.v1.IFirestoreSource=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.FirestoreSource} FirestoreSource instance
                          */
-                        BigtableSource.create = function create(properties) {
-                            return new BigtableSource(properties);
+                        FirestoreSource.create = function create(properties) {
+                            return new FirestoreSource(properties);
                         };
     
                         /**
-                         * Encodes the specified BigtableSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.BigtableSource.verify|verify} messages.
+                         * Encodes the specified FirestoreSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.FirestoreSource.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
+                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IBigtableSource} message BigtableSource message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IFirestoreSource} message FirestoreSource message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        BigtableSource.encode = function encode(message, writer) {
+                        FirestoreSource.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
                             if (message.projectId != null && Object.hasOwnProperty.call(message, "projectId"))
                                 writer.uint32(/* id 1, wireType 2 =*/10).string(message.projectId);
-                            if (message.instanceId != null && Object.hasOwnProperty.call(message, "instanceId"))
-                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.instanceId);
-                            if (message.tableId != null && Object.hasOwnProperty.call(message, "tableId"))
-                                writer.uint32(/* id 3, wireType 2 =*/26).string(message.tableId);
-                            if (message.bigtableOptions != null && Object.hasOwnProperty.call(message, "bigtableOptions"))
-                                $root.google.cloud.discoveryengine.v1.BigtableOptions.encode(message.bigtableOptions, writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
+                            if (message.databaseId != null && Object.hasOwnProperty.call(message, "databaseId"))
+                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.databaseId);
+                            if (message.collectionId != null && Object.hasOwnProperty.call(message, "collectionId"))
+                                writer.uint32(/* id 3, wireType 2 =*/26).string(message.collectionId);
+                            if (message.gcsStagingDir != null && Object.hasOwnProperty.call(message, "gcsStagingDir"))
+                                writer.uint32(/* id 4, wireType 2 =*/34).string(message.gcsStagingDir);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified BigtableSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.BigtableSource.verify|verify} messages.
+                         * Encodes the specified FirestoreSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.FirestoreSource.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
+                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IBigtableSource} message BigtableSource message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IFirestoreSource} message FirestoreSource message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        BigtableSource.encodeDelimited = function encodeDelimited(message, writer) {
+                        FirestoreSource.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a BigtableSource message from the specified reader or buffer.
+                         * Decodes a FirestoreSource message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
+                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.BigtableSource} BigtableSource
+                         * @returns {google.cloud.discoveryengine.v1.FirestoreSource} FirestoreSource
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        BigtableSource.decode = function decode(reader, length) {
+                        FirestoreSource.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.BigtableSource();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.FirestoreSource();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
@@ -9116,15 +11909,15 @@
                                         break;
                                     }
                                 case 2: {
-                                        message.instanceId = reader.string();
+                                        message.databaseId = reader.string();
                                         break;
                                     }
                                 case 3: {
-                                        message.tableId = reader.string();
+                                        message.collectionId = reader.string();
                                         break;
                                     }
                                 case 4: {
-                                        message.bigtableOptions = $root.google.cloud.discoveryengine.v1.BigtableOptions.decode(reader, reader.uint32());
+                                        message.gcsStagingDir = reader.string();
                                         break;
                                     }
                                 default:
@@ -9136,153 +11929,147 @@
                         };
     
                         /**
-                         * Decodes a BigtableSource message from the specified reader or buffer, length delimited.
+                         * Decodes a FirestoreSource message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
+                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.BigtableSource} BigtableSource
+                         * @returns {google.cloud.discoveryengine.v1.FirestoreSource} FirestoreSource
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        BigtableSource.decodeDelimited = function decodeDelimited(reader) {
+                        FirestoreSource.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a BigtableSource message.
+                         * Verifies a FirestoreSource message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
+                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        BigtableSource.verify = function verify(message) {
+                        FirestoreSource.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
                             if (message.projectId != null && message.hasOwnProperty("projectId"))
                                 if (!$util.isString(message.projectId))
                                     return "projectId: string expected";
-                            if (message.instanceId != null && message.hasOwnProperty("instanceId"))
-                                if (!$util.isString(message.instanceId))
-                                    return "instanceId: string expected";
-                            if (message.tableId != null && message.hasOwnProperty("tableId"))
-                                if (!$util.isString(message.tableId))
-                                    return "tableId: string expected";
-                            if (message.bigtableOptions != null && message.hasOwnProperty("bigtableOptions")) {
-                                var error = $root.google.cloud.discoveryengine.v1.BigtableOptions.verify(message.bigtableOptions);
-                                if (error)
-                                    return "bigtableOptions." + error;
-                            }
+                            if (message.databaseId != null && message.hasOwnProperty("databaseId"))
+                                if (!$util.isString(message.databaseId))
+                                    return "databaseId: string expected";
+                            if (message.collectionId != null && message.hasOwnProperty("collectionId"))
+                                if (!$util.isString(message.collectionId))
+                                    return "collectionId: string expected";
+                            if (message.gcsStagingDir != null && message.hasOwnProperty("gcsStagingDir"))
+                                if (!$util.isString(message.gcsStagingDir))
+                                    return "gcsStagingDir: string expected";
                             return null;
                         };
     
                         /**
-                         * Creates a BigtableSource message from a plain object. Also converts values to their respective internal types.
+                         * Creates a FirestoreSource message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
+                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.BigtableSource} BigtableSource
+                         * @returns {google.cloud.discoveryengine.v1.FirestoreSource} FirestoreSource
                          */
-                        BigtableSource.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.BigtableSource)
+                        FirestoreSource.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.FirestoreSource)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.BigtableSource();
+                            var message = new $root.google.cloud.discoveryengine.v1.FirestoreSource();
                             if (object.projectId != null)
                                 message.projectId = String(object.projectId);
-                            if (object.instanceId != null)
-                                message.instanceId = String(object.instanceId);
-                            if (object.tableId != null)
-                                message.tableId = String(object.tableId);
-                            if (object.bigtableOptions != null) {
-                                if (typeof object.bigtableOptions !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.BigtableSource.bigtableOptions: object expected");
-                                message.bigtableOptions = $root.google.cloud.discoveryengine.v1.BigtableOptions.fromObject(object.bigtableOptions);
-                            }
+                            if (object.databaseId != null)
+                                message.databaseId = String(object.databaseId);
+                            if (object.collectionId != null)
+                                message.collectionId = String(object.collectionId);
+                            if (object.gcsStagingDir != null)
+                                message.gcsStagingDir = String(object.gcsStagingDir);
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a BigtableSource message. Also converts values to other types if specified.
+                         * Creates a plain object from a FirestoreSource message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
+                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.BigtableSource} message BigtableSource
+                         * @param {google.cloud.discoveryengine.v1.FirestoreSource} message FirestoreSource
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        BigtableSource.toObject = function toObject(message, options) {
+                        FirestoreSource.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
                             if (options.defaults) {
                                 object.projectId = "";
-                                object.instanceId = "";
-                                object.tableId = "";
-                                object.bigtableOptions = null;
+                                object.databaseId = "";
+                                object.collectionId = "";
+                                object.gcsStagingDir = "";
                             }
                             if (message.projectId != null && message.hasOwnProperty("projectId"))
                                 object.projectId = message.projectId;
-                            if (message.instanceId != null && message.hasOwnProperty("instanceId"))
-                                object.instanceId = message.instanceId;
-                            if (message.tableId != null && message.hasOwnProperty("tableId"))
-                                object.tableId = message.tableId;
-                            if (message.bigtableOptions != null && message.hasOwnProperty("bigtableOptions"))
-                                object.bigtableOptions = $root.google.cloud.discoveryengine.v1.BigtableOptions.toObject(message.bigtableOptions, options);
+                            if (message.databaseId != null && message.hasOwnProperty("databaseId"))
+                                object.databaseId = message.databaseId;
+                            if (message.collectionId != null && message.hasOwnProperty("collectionId"))
+                                object.collectionId = message.collectionId;
+                            if (message.gcsStagingDir != null && message.hasOwnProperty("gcsStagingDir"))
+                                object.gcsStagingDir = message.gcsStagingDir;
                             return object;
                         };
     
                         /**
-                         * Converts this BigtableSource to JSON.
+                         * Converts this FirestoreSource to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
+                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        BigtableSource.prototype.toJSON = function toJSON() {
+                        FirestoreSource.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for BigtableSource
+                         * Gets the default type url for FirestoreSource
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.BigtableSource
+                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        BigtableSource.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        FirestoreSource.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.BigtableSource";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.FirestoreSource";
                         };
     
-                        return BigtableSource;
+                        return FirestoreSource;
                     })();
     
-                    v1.FhirStoreSource = (function() {
+                    v1.ImportErrorConfig = (function() {
     
                         /**
-                         * Properties of a FhirStoreSource.
+                         * Properties of an ImportErrorConfig.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IFhirStoreSource
-                         * @property {string|null} [fhirStore] FhirStoreSource fhirStore
-                         * @property {string|null} [gcsStagingDir] FhirStoreSource gcsStagingDir
+                         * @interface IImportErrorConfig
+                         * @property {string|null} [gcsPrefix] ImportErrorConfig gcsPrefix
                          */
     
                         /**
-                         * Constructs a new FhirStoreSource.
+                         * Constructs a new ImportErrorConfig.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a FhirStoreSource.
-                         * @implements IFhirStoreSource
+                         * @classdesc Represents an ImportErrorConfig.
+                         * @implements IImportErrorConfig
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IFhirStoreSource=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IImportErrorConfig=} [properties] Properties to set
                          */
-                        function FhirStoreSource(properties) {
+                        function ImportErrorConfig(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -9290,89 +12077,89 @@
                         }
     
                         /**
-                         * FhirStoreSource fhirStore.
-                         * @member {string} fhirStore
-                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
+                         * ImportErrorConfig gcsPrefix.
+                         * @member {string|null|undefined} gcsPrefix
+                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
                          * @instance
                          */
-                        FhirStoreSource.prototype.fhirStore = "";
+                        ImportErrorConfig.prototype.gcsPrefix = null;
+    
+                        // OneOf field names bound to virtual getters and setters
+                        var $oneOfFields;
     
                         /**
-                         * FhirStoreSource gcsStagingDir.
-                         * @member {string} gcsStagingDir
-                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
+                         * ImportErrorConfig destination.
+                         * @member {"gcsPrefix"|undefined} destination
+                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
                          * @instance
                          */
-                        FhirStoreSource.prototype.gcsStagingDir = "";
+                        Object.defineProperty(ImportErrorConfig.prototype, "destination", {
+                            get: $util.oneOfGetter($oneOfFields = ["gcsPrefix"]),
+                            set: $util.oneOfSetter($oneOfFields)
+                        });
     
                         /**
-                         * Creates a new FhirStoreSource instance using the specified properties.
+                         * Creates a new ImportErrorConfig instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IFhirStoreSource=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.FhirStoreSource} FhirStoreSource instance
+                         * @param {google.cloud.discoveryengine.v1.IImportErrorConfig=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.ImportErrorConfig} ImportErrorConfig instance
                          */
-                        FhirStoreSource.create = function create(properties) {
-                            return new FhirStoreSource(properties);
+                        ImportErrorConfig.create = function create(properties) {
+                            return new ImportErrorConfig(properties);
                         };
     
                         /**
-                         * Encodes the specified FhirStoreSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.FhirStoreSource.verify|verify} messages.
+                         * Encodes the specified ImportErrorConfig message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportErrorConfig.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IFhirStoreSource} message FhirStoreSource message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IImportErrorConfig} message ImportErrorConfig message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        FhirStoreSource.encode = function encode(message, writer) {
+                        ImportErrorConfig.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.fhirStore != null && Object.hasOwnProperty.call(message, "fhirStore"))
-                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.fhirStore);
-                            if (message.gcsStagingDir != null && Object.hasOwnProperty.call(message, "gcsStagingDir"))
-                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.gcsStagingDir);
+                            if (message.gcsPrefix != null && Object.hasOwnProperty.call(message, "gcsPrefix"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.gcsPrefix);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified FhirStoreSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.FhirStoreSource.verify|verify} messages.
+                         * Encodes the specified ImportErrorConfig message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportErrorConfig.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IFhirStoreSource} message FhirStoreSource message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IImportErrorConfig} message ImportErrorConfig message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        FhirStoreSource.encodeDelimited = function encodeDelimited(message, writer) {
+                        ImportErrorConfig.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a FhirStoreSource message from the specified reader or buffer.
+                         * Decodes an ImportErrorConfig message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.FhirStoreSource} FhirStoreSource
+                         * @returns {google.cloud.discoveryengine.v1.ImportErrorConfig} ImportErrorConfig
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        FhirStoreSource.decode = function decode(reader, length) {
+                        ImportErrorConfig.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.FhirStoreSource();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportErrorConfig();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 1: {
-                                        message.fhirStore = reader.string();
-                                        break;
-                                    }
-                                case 2: {
-                                        message.gcsStagingDir = reader.string();
+                                        message.gcsPrefix = reader.string();
                                         break;
                                     }
                                 default:
@@ -9384,136 +12171,130 @@
                         };
     
                         /**
-                         * Decodes a FhirStoreSource message from the specified reader or buffer, length delimited.
+                         * Decodes an ImportErrorConfig message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.FhirStoreSource} FhirStoreSource
+                         * @returns {google.cloud.discoveryengine.v1.ImportErrorConfig} ImportErrorConfig
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        FhirStoreSource.decodeDelimited = function decodeDelimited(reader) {
+                        ImportErrorConfig.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a FhirStoreSource message.
+                         * Verifies an ImportErrorConfig message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        FhirStoreSource.verify = function verify(message) {
+                        ImportErrorConfig.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            if (message.fhirStore != null && message.hasOwnProperty("fhirStore"))
-                                if (!$util.isString(message.fhirStore))
-                                    return "fhirStore: string expected";
-                            if (message.gcsStagingDir != null && message.hasOwnProperty("gcsStagingDir"))
-                                if (!$util.isString(message.gcsStagingDir))
-                                    return "gcsStagingDir: string expected";
+                            var properties = {};
+                            if (message.gcsPrefix != null && message.hasOwnProperty("gcsPrefix")) {
+                                properties.destination = 1;
+                                if (!$util.isString(message.gcsPrefix))
+                                    return "gcsPrefix: string expected";
+                            }
                             return null;
                         };
     
                         /**
-                         * Creates a FhirStoreSource message from a plain object. Also converts values to their respective internal types.
+                         * Creates an ImportErrorConfig message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.FhirStoreSource} FhirStoreSource
+                         * @returns {google.cloud.discoveryengine.v1.ImportErrorConfig} ImportErrorConfig
                          */
-                        FhirStoreSource.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.FhirStoreSource)
+                        ImportErrorConfig.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.ImportErrorConfig)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.FhirStoreSource();
-                            if (object.fhirStore != null)
-                                message.fhirStore = String(object.fhirStore);
-                            if (object.gcsStagingDir != null)
-                                message.gcsStagingDir = String(object.gcsStagingDir);
+                            var message = new $root.google.cloud.discoveryengine.v1.ImportErrorConfig();
+                            if (object.gcsPrefix != null)
+                                message.gcsPrefix = String(object.gcsPrefix);
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a FhirStoreSource message. Also converts values to other types if specified.
+                         * Creates a plain object from an ImportErrorConfig message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.FhirStoreSource} message FhirStoreSource
+                         * @param {google.cloud.discoveryengine.v1.ImportErrorConfig} message ImportErrorConfig
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        FhirStoreSource.toObject = function toObject(message, options) {
+                        ImportErrorConfig.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
-                            if (options.defaults) {
-                                object.fhirStore = "";
-                                object.gcsStagingDir = "";
+                            if (message.gcsPrefix != null && message.hasOwnProperty("gcsPrefix")) {
+                                object.gcsPrefix = message.gcsPrefix;
+                                if (options.oneofs)
+                                    object.destination = "gcsPrefix";
                             }
-                            if (message.fhirStore != null && message.hasOwnProperty("fhirStore"))
-                                object.fhirStore = message.fhirStore;
-                            if (message.gcsStagingDir != null && message.hasOwnProperty("gcsStagingDir"))
-                                object.gcsStagingDir = message.gcsStagingDir;
                             return object;
                         };
     
                         /**
-                         * Converts this FhirStoreSource to JSON.
+                         * Converts this ImportErrorConfig to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        FhirStoreSource.prototype.toJSON = function toJSON() {
+                        ImportErrorConfig.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for FhirStoreSource
+                         * Gets the default type url for ImportErrorConfig
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.FhirStoreSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        FhirStoreSource.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        ImportErrorConfig.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.FhirStoreSource";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportErrorConfig";
                         };
     
-                        return FhirStoreSource;
+                        return ImportErrorConfig;
                     })();
     
-                    v1.CloudSqlSource = (function() {
+                    v1.ImportUserEventsRequest = (function() {
     
                         /**
-                         * Properties of a CloudSqlSource.
+                         * Properties of an ImportUserEventsRequest.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface ICloudSqlSource
-                         * @property {string|null} [projectId] CloudSqlSource projectId
-                         * @property {string|null} [instanceId] CloudSqlSource instanceId
-                         * @property {string|null} [databaseId] CloudSqlSource databaseId
-                         * @property {string|null} [tableId] CloudSqlSource tableId
-                         * @property {string|null} [gcsStagingDir] CloudSqlSource gcsStagingDir
-                         * @property {boolean|null} [offload] CloudSqlSource offload
+                         * @interface IImportUserEventsRequest
+                         * @property {google.cloud.discoveryengine.v1.ImportUserEventsRequest.IInlineSource|null} [inlineSource] ImportUserEventsRequest inlineSource
+                         * @property {google.cloud.discoveryengine.v1.IGcsSource|null} [gcsSource] ImportUserEventsRequest gcsSource
+                         * @property {google.cloud.discoveryengine.v1.IBigQuerySource|null} [bigquerySource] ImportUserEventsRequest bigquerySource
+                         * @property {string|null} [parent] ImportUserEventsRequest parent
+                         * @property {google.cloud.discoveryengine.v1.IImportErrorConfig|null} [errorConfig] ImportUserEventsRequest errorConfig
                          */
     
                         /**
-                         * Constructs a new CloudSqlSource.
+                         * Constructs a new ImportUserEventsRequest.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a CloudSqlSource.
-                         * @implements ICloudSqlSource
+                         * @classdesc Represents an ImportUserEventsRequest.
+                         * @implements IImportUserEventsRequest
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.ICloudSqlSource=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsRequest=} [properties] Properties to set
                          */
-                        function CloudSqlSource(properties) {
+                        function ImportUserEventsRequest(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -9521,145 +12302,145 @@
                         }
     
                         /**
-                         * CloudSqlSource projectId.
-                         * @member {string} projectId
-                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
+                         * ImportUserEventsRequest inlineSource.
+                         * @member {google.cloud.discoveryengine.v1.ImportUserEventsRequest.IInlineSource|null|undefined} inlineSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
                          * @instance
                          */
-                        CloudSqlSource.prototype.projectId = "";
+                        ImportUserEventsRequest.prototype.inlineSource = null;
     
                         /**
-                         * CloudSqlSource instanceId.
-                         * @member {string} instanceId
-                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
+                         * ImportUserEventsRequest gcsSource.
+                         * @member {google.cloud.discoveryengine.v1.IGcsSource|null|undefined} gcsSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
                          * @instance
                          */
-                        CloudSqlSource.prototype.instanceId = "";
+                        ImportUserEventsRequest.prototype.gcsSource = null;
     
                         /**
-                         * CloudSqlSource databaseId.
-                         * @member {string} databaseId
-                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
+                         * ImportUserEventsRequest bigquerySource.
+                         * @member {google.cloud.discoveryengine.v1.IBigQuerySource|null|undefined} bigquerySource
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
                          * @instance
                          */
-                        CloudSqlSource.prototype.databaseId = "";
+                        ImportUserEventsRequest.prototype.bigquerySource = null;
     
                         /**
-                         * CloudSqlSource tableId.
-                         * @member {string} tableId
-                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
+                         * ImportUserEventsRequest parent.
+                         * @member {string} parent
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
                          * @instance
                          */
-                        CloudSqlSource.prototype.tableId = "";
+                        ImportUserEventsRequest.prototype.parent = "";
     
                         /**
-                         * CloudSqlSource gcsStagingDir.
-                         * @member {string} gcsStagingDir
-                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
+                         * ImportUserEventsRequest errorConfig.
+                         * @member {google.cloud.discoveryengine.v1.IImportErrorConfig|null|undefined} errorConfig
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
                          * @instance
                          */
-                        CloudSqlSource.prototype.gcsStagingDir = "";
+                        ImportUserEventsRequest.prototype.errorConfig = null;
+    
+                        // OneOf field names bound to virtual getters and setters
+                        var $oneOfFields;
     
                         /**
-                         * CloudSqlSource offload.
-                         * @member {boolean} offload
-                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
+                         * ImportUserEventsRequest source.
+                         * @member {"inlineSource"|"gcsSource"|"bigquerySource"|undefined} source
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
                          * @instance
                          */
-                        CloudSqlSource.prototype.offload = false;
+                        Object.defineProperty(ImportUserEventsRequest.prototype, "source", {
+                            get: $util.oneOfGetter($oneOfFields = ["inlineSource", "gcsSource", "bigquerySource"]),
+                            set: $util.oneOfSetter($oneOfFields)
+                        });
     
                         /**
-                         * Creates a new CloudSqlSource instance using the specified properties.
+                         * Creates a new ImportUserEventsRequest instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ICloudSqlSource=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.CloudSqlSource} CloudSqlSource instance
+                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsRequest=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsRequest} ImportUserEventsRequest instance
                          */
-                        CloudSqlSource.create = function create(properties) {
-                            return new CloudSqlSource(properties);
+                        ImportUserEventsRequest.create = function create(properties) {
+                            return new ImportUserEventsRequest(properties);
                         };
     
                         /**
-                         * Encodes the specified CloudSqlSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.CloudSqlSource.verify|verify} messages.
+                         * Encodes the specified ImportUserEventsRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsRequest.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ICloudSqlSource} message CloudSqlSource message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsRequest} message ImportUserEventsRequest message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        CloudSqlSource.encode = function encode(message, writer) {
+                        ImportUserEventsRequest.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.projectId != null && Object.hasOwnProperty.call(message, "projectId"))
-                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.projectId);
-                            if (message.instanceId != null && Object.hasOwnProperty.call(message, "instanceId"))
-                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.instanceId);
-                            if (message.databaseId != null && Object.hasOwnProperty.call(message, "databaseId"))
-                                writer.uint32(/* id 3, wireType 2 =*/26).string(message.databaseId);
-                            if (message.tableId != null && Object.hasOwnProperty.call(message, "tableId"))
-                                writer.uint32(/* id 4, wireType 2 =*/34).string(message.tableId);
-                            if (message.gcsStagingDir != null && Object.hasOwnProperty.call(message, "gcsStagingDir"))
-                                writer.uint32(/* id 5, wireType 2 =*/42).string(message.gcsStagingDir);
-                            if (message.offload != null && Object.hasOwnProperty.call(message, "offload"))
-                                writer.uint32(/* id 6, wireType 0 =*/48).bool(message.offload);
+                            if (message.parent != null && Object.hasOwnProperty.call(message, "parent"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.parent);
+                            if (message.inlineSource != null && Object.hasOwnProperty.call(message, "inlineSource"))
+                                $root.google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource.encode(message.inlineSource, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                            if (message.gcsSource != null && Object.hasOwnProperty.call(message, "gcsSource"))
+                                $root.google.cloud.discoveryengine.v1.GcsSource.encode(message.gcsSource, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
+                            if (message.bigquerySource != null && Object.hasOwnProperty.call(message, "bigquerySource"))
+                                $root.google.cloud.discoveryengine.v1.BigQuerySource.encode(message.bigquerySource, writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
+                            if (message.errorConfig != null && Object.hasOwnProperty.call(message, "errorConfig"))
+                                $root.google.cloud.discoveryengine.v1.ImportErrorConfig.encode(message.errorConfig, writer.uint32(/* id 5, wireType 2 =*/42).fork()).ldelim();
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified CloudSqlSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.CloudSqlSource.verify|verify} messages.
+                         * Encodes the specified ImportUserEventsRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsRequest.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ICloudSqlSource} message CloudSqlSource message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsRequest} message ImportUserEventsRequest message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        CloudSqlSource.encodeDelimited = function encodeDelimited(message, writer) {
+                        ImportUserEventsRequest.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a CloudSqlSource message from the specified reader or buffer.
+                         * Decodes an ImportUserEventsRequest message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.CloudSqlSource} CloudSqlSource
+                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsRequest} ImportUserEventsRequest
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        CloudSqlSource.decode = function decode(reader, length) {
+                        ImportUserEventsRequest.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.CloudSqlSource();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportUserEventsRequest();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
-                                case 1: {
-                                        message.projectId = reader.string();
-                                        break;
-                                    }
                                 case 2: {
-                                        message.instanceId = reader.string();
+                                        message.inlineSource = $root.google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource.decode(reader, reader.uint32());
                                         break;
                                     }
                                 case 3: {
-                                        message.databaseId = reader.string();
+                                        message.gcsSource = $root.google.cloud.discoveryengine.v1.GcsSource.decode(reader, reader.uint32());
                                         break;
                                     }
                                 case 4: {
-                                        message.tableId = reader.string();
+                                        message.bigquerySource = $root.google.cloud.discoveryengine.v1.BigQuerySource.decode(reader, reader.uint32());
                                         break;
                                     }
-                                case 5: {
-                                        message.gcsStagingDir = reader.string();
+                                case 1: {
+                                        message.parent = reader.string();
                                         break;
                                     }
-                                case 6: {
-                                        message.offload = reader.bool();
+                                case 5: {
+                                        message.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.decode(reader, reader.uint32());
                                         break;
                                     }
                                 default:
@@ -9671,166 +12452,423 @@
                         };
     
                         /**
-                         * Decodes a CloudSqlSource message from the specified reader or buffer, length delimited.
+                         * Decodes an ImportUserEventsRequest message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.CloudSqlSource} CloudSqlSource
+                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsRequest} ImportUserEventsRequest
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        CloudSqlSource.decodeDelimited = function decodeDelimited(reader) {
+                        ImportUserEventsRequest.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a CloudSqlSource message.
+                         * Verifies an ImportUserEventsRequest message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        CloudSqlSource.verify = function verify(message) {
+                        ImportUserEventsRequest.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            if (message.projectId != null && message.hasOwnProperty("projectId"))
-                                if (!$util.isString(message.projectId))
-                                    return "projectId: string expected";
-                            if (message.instanceId != null && message.hasOwnProperty("instanceId"))
-                                if (!$util.isString(message.instanceId))
-                                    return "instanceId: string expected";
-                            if (message.databaseId != null && message.hasOwnProperty("databaseId"))
-                                if (!$util.isString(message.databaseId))
-                                    return "databaseId: string expected";
-                            if (message.tableId != null && message.hasOwnProperty("tableId"))
-                                if (!$util.isString(message.tableId))
-                                    return "tableId: string expected";
-                            if (message.gcsStagingDir != null && message.hasOwnProperty("gcsStagingDir"))
-                                if (!$util.isString(message.gcsStagingDir))
-                                    return "gcsStagingDir: string expected";
-                            if (message.offload != null && message.hasOwnProperty("offload"))
-                                if (typeof message.offload !== "boolean")
-                                    return "offload: boolean expected";
+                            var properties = {};
+                            if (message.inlineSource != null && message.hasOwnProperty("inlineSource")) {
+                                properties.source = 1;
+                                {
+                                    var error = $root.google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource.verify(message.inlineSource);
+                                    if (error)
+                                        return "inlineSource." + error;
+                                }
+                            }
+                            if (message.gcsSource != null && message.hasOwnProperty("gcsSource")) {
+                                if (properties.source === 1)
+                                    return "source: multiple values";
+                                properties.source = 1;
+                                {
+                                    var error = $root.google.cloud.discoveryengine.v1.GcsSource.verify(message.gcsSource);
+                                    if (error)
+                                        return "gcsSource." + error;
+                                }
+                            }
+                            if (message.bigquerySource != null && message.hasOwnProperty("bigquerySource")) {
+                                if (properties.source === 1)
+                                    return "source: multiple values";
+                                properties.source = 1;
+                                {
+                                    var error = $root.google.cloud.discoveryengine.v1.BigQuerySource.verify(message.bigquerySource);
+                                    if (error)
+                                        return "bigquerySource." + error;
+                                }
+                            }
+                            if (message.parent != null && message.hasOwnProperty("parent"))
+                                if (!$util.isString(message.parent))
+                                    return "parent: string expected";
+                            if (message.errorConfig != null && message.hasOwnProperty("errorConfig")) {
+                                var error = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.verify(message.errorConfig);
+                                if (error)
+                                    return "errorConfig." + error;
+                            }
                             return null;
                         };
     
                         /**
-                         * Creates a CloudSqlSource message from a plain object. Also converts values to their respective internal types.
+                         * Creates an ImportUserEventsRequest message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.CloudSqlSource} CloudSqlSource
+                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsRequest} ImportUserEventsRequest
                          */
-                        CloudSqlSource.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.CloudSqlSource)
+                        ImportUserEventsRequest.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.ImportUserEventsRequest)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.CloudSqlSource();
-                            if (object.projectId != null)
-                                message.projectId = String(object.projectId);
-                            if (object.instanceId != null)
-                                message.instanceId = String(object.instanceId);
-                            if (object.databaseId != null)
-                                message.databaseId = String(object.databaseId);
-                            if (object.tableId != null)
-                                message.tableId = String(object.tableId);
-                            if (object.gcsStagingDir != null)
-                                message.gcsStagingDir = String(object.gcsStagingDir);
-                            if (object.offload != null)
-                                message.offload = Boolean(object.offload);
+                            var message = new $root.google.cloud.discoveryengine.v1.ImportUserEventsRequest();
+                            if (object.inlineSource != null) {
+                                if (typeof object.inlineSource !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportUserEventsRequest.inlineSource: object expected");
+                                message.inlineSource = $root.google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource.fromObject(object.inlineSource);
+                            }
+                            if (object.gcsSource != null) {
+                                if (typeof object.gcsSource !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportUserEventsRequest.gcsSource: object expected");
+                                message.gcsSource = $root.google.cloud.discoveryengine.v1.GcsSource.fromObject(object.gcsSource);
+                            }
+                            if (object.bigquerySource != null) {
+                                if (typeof object.bigquerySource !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportUserEventsRequest.bigquerySource: object expected");
+                                message.bigquerySource = $root.google.cloud.discoveryengine.v1.BigQuerySource.fromObject(object.bigquerySource);
+                            }
+                            if (object.parent != null)
+                                message.parent = String(object.parent);
+                            if (object.errorConfig != null) {
+                                if (typeof object.errorConfig !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportUserEventsRequest.errorConfig: object expected");
+                                message.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.fromObject(object.errorConfig);
+                            }
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a CloudSqlSource message. Also converts values to other types if specified.
+                         * Creates a plain object from an ImportUserEventsRequest message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.CloudSqlSource} message CloudSqlSource
+                         * @param {google.cloud.discoveryengine.v1.ImportUserEventsRequest} message ImportUserEventsRequest
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        CloudSqlSource.toObject = function toObject(message, options) {
+                        ImportUserEventsRequest.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
                             if (options.defaults) {
-                                object.projectId = "";
-                                object.instanceId = "";
-                                object.databaseId = "";
-                                object.tableId = "";
-                                object.gcsStagingDir = "";
-                                object.offload = false;
+                                object.parent = "";
+                                object.errorConfig = null;
                             }
-                            if (message.projectId != null && message.hasOwnProperty("projectId"))
-                                object.projectId = message.projectId;
-                            if (message.instanceId != null && message.hasOwnProperty("instanceId"))
-                                object.instanceId = message.instanceId;
-                            if (message.databaseId != null && message.hasOwnProperty("databaseId"))
-                                object.databaseId = message.databaseId;
-                            if (message.tableId != null && message.hasOwnProperty("tableId"))
-                                object.tableId = message.tableId;
-                            if (message.gcsStagingDir != null && message.hasOwnProperty("gcsStagingDir"))
-                                object.gcsStagingDir = message.gcsStagingDir;
-                            if (message.offload != null && message.hasOwnProperty("offload"))
-                                object.offload = message.offload;
+                            if (message.parent != null && message.hasOwnProperty("parent"))
+                                object.parent = message.parent;
+                            if (message.inlineSource != null && message.hasOwnProperty("inlineSource")) {
+                                object.inlineSource = $root.google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource.toObject(message.inlineSource, options);
+                                if (options.oneofs)
+                                    object.source = "inlineSource";
+                            }
+                            if (message.gcsSource != null && message.hasOwnProperty("gcsSource")) {
+                                object.gcsSource = $root.google.cloud.discoveryengine.v1.GcsSource.toObject(message.gcsSource, options);
+                                if (options.oneofs)
+                                    object.source = "gcsSource";
+                            }
+                            if (message.bigquerySource != null && message.hasOwnProperty("bigquerySource")) {
+                                object.bigquerySource = $root.google.cloud.discoveryengine.v1.BigQuerySource.toObject(message.bigquerySource, options);
+                                if (options.oneofs)
+                                    object.source = "bigquerySource";
+                            }
+                            if (message.errorConfig != null && message.hasOwnProperty("errorConfig"))
+                                object.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.toObject(message.errorConfig, options);
                             return object;
                         };
     
                         /**
-                         * Converts this CloudSqlSource to JSON.
+                         * Converts this ImportUserEventsRequest to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        CloudSqlSource.prototype.toJSON = function toJSON() {
+                        ImportUserEventsRequest.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for CloudSqlSource
+                         * Gets the default type url for ImportUserEventsRequest
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.CloudSqlSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        CloudSqlSource.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        ImportUserEventsRequest.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.CloudSqlSource";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportUserEventsRequest";
                         };
     
-                        return CloudSqlSource;
+                        ImportUserEventsRequest.InlineSource = (function() {
+    
+                            /**
+                             * Properties of an InlineSource.
+                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
+                             * @interface IInlineSource
+                             * @property {Array.<google.cloud.discoveryengine.v1.IUserEvent>|null} [userEvents] InlineSource userEvents
+                             */
+    
+                            /**
+                             * Constructs a new InlineSource.
+                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
+                             * @classdesc Represents an InlineSource.
+                             * @implements IInlineSource
+                             * @constructor
+                             * @param {google.cloud.discoveryengine.v1.ImportUserEventsRequest.IInlineSource=} [properties] Properties to set
+                             */
+                            function InlineSource(properties) {
+                                this.userEvents = [];
+                                if (properties)
+                                    for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                        if (properties[keys[i]] != null)
+                                            this[keys[i]] = properties[keys[i]];
+                            }
+    
+                            /**
+                             * InlineSource userEvents.
+                             * @member {Array.<google.cloud.discoveryengine.v1.IUserEvent>} userEvents
+                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource
+                             * @instance
+                             */
+                            InlineSource.prototype.userEvents = $util.emptyArray;
+    
+                            /**
+                             * Creates a new InlineSource instance using the specified properties.
+                             * @function create
+                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.ImportUserEventsRequest.IInlineSource=} [properties] Properties to set
+                             * @returns {google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource} InlineSource instance
+                             */
+                            InlineSource.create = function create(properties) {
+                                return new InlineSource(properties);
+                            };
+    
+                            /**
+                             * Encodes the specified InlineSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource.verify|verify} messages.
+                             * @function encode
+                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.ImportUserEventsRequest.IInlineSource} message InlineSource message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            InlineSource.encode = function encode(message, writer) {
+                                if (!writer)
+                                    writer = $Writer.create();
+                                if (message.userEvents != null && message.userEvents.length)
+                                    for (var i = 0; i < message.userEvents.length; ++i)
+                                        $root.google.cloud.discoveryengine.v1.UserEvent.encode(message.userEvents[i], writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                                return writer;
+                            };
+    
+                            /**
+                             * Encodes the specified InlineSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource.verify|verify} messages.
+                             * @function encodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.ImportUserEventsRequest.IInlineSource} message InlineSource message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            InlineSource.encodeDelimited = function encodeDelimited(message, writer) {
+                                return this.encode(message, writer).ldelim();
+                            };
+    
+                            /**
+                             * Decodes an InlineSource message from the specified reader or buffer.
+                             * @function decode
+                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @param {number} [length] Message length if known beforehand
+                             * @returns {google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource} InlineSource
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            InlineSource.decode = function decode(reader, length) {
+                                if (!(reader instanceof $Reader))
+                                    reader = $Reader.create(reader);
+                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource();
+                                while (reader.pos < end) {
+                                    var tag = reader.uint32();
+                                    switch (tag >>> 3) {
+                                    case 1: {
+                                            if (!(message.userEvents && message.userEvents.length))
+                                                message.userEvents = [];
+                                            message.userEvents.push($root.google.cloud.discoveryengine.v1.UserEvent.decode(reader, reader.uint32()));
+                                            break;
+                                        }
+                                    default:
+                                        reader.skipType(tag & 7);
+                                        break;
+                                    }
+                                }
+                                return message;
+                            };
+    
+                            /**
+                             * Decodes an InlineSource message from the specified reader or buffer, length delimited.
+                             * @function decodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @returns {google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource} InlineSource
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            InlineSource.decodeDelimited = function decodeDelimited(reader) {
+                                if (!(reader instanceof $Reader))
+                                    reader = new $Reader(reader);
+                                return this.decode(reader, reader.uint32());
+                            };
+    
+                            /**
+                             * Verifies an InlineSource message.
+                             * @function verify
+                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource
+                             * @static
+                             * @param {Object.<string,*>} message Plain object to verify
+                             * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                             */
+                            InlineSource.verify = function verify(message) {
+                                if (typeof message !== "object" || message === null)
+                                    return "object expected";
+                                if (message.userEvents != null && message.hasOwnProperty("userEvents")) {
+                                    if (!Array.isArray(message.userEvents))
+                                        return "userEvents: array expected";
+                                    for (var i = 0; i < message.userEvents.length; ++i) {
+                                        var error = $root.google.cloud.discoveryengine.v1.UserEvent.verify(message.userEvents[i]);
+                                        if (error)
+                                            return "userEvents." + error;
+                                    }
+                                }
+                                return null;
+                            };
+    
+                            /**
+                             * Creates an InlineSource message from a plain object. Also converts values to their respective internal types.
+                             * @function fromObject
+                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource
+                             * @static
+                             * @param {Object.<string,*>} object Plain object
+                             * @returns {google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource} InlineSource
+                             */
+                            InlineSource.fromObject = function fromObject(object) {
+                                if (object instanceof $root.google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource)
+                                    return object;
+                                var message = new $root.google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource();
+                                if (object.userEvents) {
+                                    if (!Array.isArray(object.userEvents))
+                                        throw TypeError(".google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource.userEvents: array expected");
+                                    message.userEvents = [];
+                                    for (var i = 0; i < object.userEvents.length; ++i) {
+                                        if (typeof object.userEvents[i] !== "object")
+                                            throw TypeError(".google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource.userEvents: object expected");
+                                        message.userEvents[i] = $root.google.cloud.discoveryengine.v1.UserEvent.fromObject(object.userEvents[i]);
+                                    }
+                                }
+                                return message;
+                            };
+    
+                            /**
+                             * Creates a plain object from an InlineSource message. Also converts values to other types if specified.
+                             * @function toObject
+                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource} message InlineSource
+                             * @param {$protobuf.IConversionOptions} [options] Conversion options
+                             * @returns {Object.<string,*>} Plain object
+                             */
+                            InlineSource.toObject = function toObject(message, options) {
+                                if (!options)
+                                    options = {};
+                                var object = {};
+                                if (options.arrays || options.defaults)
+                                    object.userEvents = [];
+                                if (message.userEvents && message.userEvents.length) {
+                                    object.userEvents = [];
+                                    for (var j = 0; j < message.userEvents.length; ++j)
+                                        object.userEvents[j] = $root.google.cloud.discoveryengine.v1.UserEvent.toObject(message.userEvents[j], options);
+                                }
+                                return object;
+                            };
+    
+                            /**
+                             * Converts this InlineSource to JSON.
+                             * @function toJSON
+                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource
+                             * @instance
+                             * @returns {Object.<string,*>} JSON object
+                             */
+                            InlineSource.prototype.toJSON = function toJSON() {
+                                return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                            };
+    
+                            /**
+                             * Gets the default type url for InlineSource
+                             * @function getTypeUrl
+                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource
+                             * @static
+                             * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                             * @returns {string} The default type url
+                             */
+                            InlineSource.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                                if (typeUrlPrefix === undefined) {
+                                    typeUrlPrefix = "type.googleapis.com";
+                                }
+                                return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource";
+                            };
+    
+                            return InlineSource;
+                        })();
+    
+                        return ImportUserEventsRequest;
                     })();
     
-                    v1.FirestoreSource = (function() {
+                    v1.ImportUserEventsResponse = (function() {
     
                         /**
-                         * Properties of a FirestoreSource.
+                         * Properties of an ImportUserEventsResponse.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IFirestoreSource
-                         * @property {string|null} [projectId] FirestoreSource projectId
-                         * @property {string|null} [databaseId] FirestoreSource databaseId
-                         * @property {string|null} [collectionId] FirestoreSource collectionId
-                         * @property {string|null} [gcsStagingDir] FirestoreSource gcsStagingDir
+                         * @interface IImportUserEventsResponse
+                         * @property {Array.<google.rpc.IStatus>|null} [errorSamples] ImportUserEventsResponse errorSamples
+                         * @property {google.cloud.discoveryengine.v1.IImportErrorConfig|null} [errorConfig] ImportUserEventsResponse errorConfig
+                         * @property {number|Long|null} [joinedEventsCount] ImportUserEventsResponse joinedEventsCount
+                         * @property {number|Long|null} [unjoinedEventsCount] ImportUserEventsResponse unjoinedEventsCount
                          */
     
                         /**
-                         * Constructs a new FirestoreSource.
+                         * Constructs a new ImportUserEventsResponse.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a FirestoreSource.
-                         * @implements IFirestoreSource
+                         * @classdesc Represents an ImportUserEventsResponse.
+                         * @implements IImportUserEventsResponse
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IFirestoreSource=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsResponse=} [properties] Properties to set
                          */
-                        function FirestoreSource(properties) {
+                        function ImportUserEventsResponse(properties) {
+                            this.errorSamples = [];
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -9838,117 +12876,120 @@
                         }
     
                         /**
-                         * FirestoreSource projectId.
-                         * @member {string} projectId
-                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
+                         * ImportUserEventsResponse errorSamples.
+                         * @member {Array.<google.rpc.IStatus>} errorSamples
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
                          * @instance
                          */
-                        FirestoreSource.prototype.projectId = "";
+                        ImportUserEventsResponse.prototype.errorSamples = $util.emptyArray;
     
                         /**
-                         * FirestoreSource databaseId.
-                         * @member {string} databaseId
-                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
+                         * ImportUserEventsResponse errorConfig.
+                         * @member {google.cloud.discoveryengine.v1.IImportErrorConfig|null|undefined} errorConfig
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
                          * @instance
                          */
-                        FirestoreSource.prototype.databaseId = "";
+                        ImportUserEventsResponse.prototype.errorConfig = null;
     
                         /**
-                         * FirestoreSource collectionId.
-                         * @member {string} collectionId
-                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
+                         * ImportUserEventsResponse joinedEventsCount.
+                         * @member {number|Long} joinedEventsCount
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
                          * @instance
                          */
-                        FirestoreSource.prototype.collectionId = "";
+                        ImportUserEventsResponse.prototype.joinedEventsCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
     
                         /**
-                         * FirestoreSource gcsStagingDir.
-                         * @member {string} gcsStagingDir
-                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
+                         * ImportUserEventsResponse unjoinedEventsCount.
+                         * @member {number|Long} unjoinedEventsCount
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
                          * @instance
                          */
-                        FirestoreSource.prototype.gcsStagingDir = "";
+                        ImportUserEventsResponse.prototype.unjoinedEventsCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
     
                         /**
-                         * Creates a new FirestoreSource instance using the specified properties.
+                         * Creates a new ImportUserEventsResponse instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IFirestoreSource=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.FirestoreSource} FirestoreSource instance
+                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsResponse=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsResponse} ImportUserEventsResponse instance
                          */
-                        FirestoreSource.create = function create(properties) {
-                            return new FirestoreSource(properties);
+                        ImportUserEventsResponse.create = function create(properties) {
+                            return new ImportUserEventsResponse(properties);
                         };
     
                         /**
-                         * Encodes the specified FirestoreSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.FirestoreSource.verify|verify} messages.
+                         * Encodes the specified ImportUserEventsResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsResponse.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IFirestoreSource} message FirestoreSource message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsResponse} message ImportUserEventsResponse message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        FirestoreSource.encode = function encode(message, writer) {
+                        ImportUserEventsResponse.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.projectId != null && Object.hasOwnProperty.call(message, "projectId"))
-                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.projectId);
-                            if (message.databaseId != null && Object.hasOwnProperty.call(message, "databaseId"))
-                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.databaseId);
-                            if (message.collectionId != null && Object.hasOwnProperty.call(message, "collectionId"))
-                                writer.uint32(/* id 3, wireType 2 =*/26).string(message.collectionId);
-                            if (message.gcsStagingDir != null && Object.hasOwnProperty.call(message, "gcsStagingDir"))
-                                writer.uint32(/* id 4, wireType 2 =*/34).string(message.gcsStagingDir);
+                            if (message.errorSamples != null && message.errorSamples.length)
+                                for (var i = 0; i < message.errorSamples.length; ++i)
+                                    $root.google.rpc.Status.encode(message.errorSamples[i], writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                            if (message.errorConfig != null && Object.hasOwnProperty.call(message, "errorConfig"))
+                                $root.google.cloud.discoveryengine.v1.ImportErrorConfig.encode(message.errorConfig, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                            if (message.joinedEventsCount != null && Object.hasOwnProperty.call(message, "joinedEventsCount"))
+                                writer.uint32(/* id 3, wireType 0 =*/24).int64(message.joinedEventsCount);
+                            if (message.unjoinedEventsCount != null && Object.hasOwnProperty.call(message, "unjoinedEventsCount"))
+                                writer.uint32(/* id 4, wireType 0 =*/32).int64(message.unjoinedEventsCount);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified FirestoreSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.FirestoreSource.verify|verify} messages.
+                         * Encodes the specified ImportUserEventsResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsResponse.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IFirestoreSource} message FirestoreSource message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsResponse} message ImportUserEventsResponse message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        FirestoreSource.encodeDelimited = function encodeDelimited(message, writer) {
+                        ImportUserEventsResponse.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a FirestoreSource message from the specified reader or buffer.
+                         * Decodes an ImportUserEventsResponse message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.FirestoreSource} FirestoreSource
+                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsResponse} ImportUserEventsResponse
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        FirestoreSource.decode = function decode(reader, length) {
+                        ImportUserEventsResponse.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.FirestoreSource();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportUserEventsResponse();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 1: {
-                                        message.projectId = reader.string();
+                                        if (!(message.errorSamples && message.errorSamples.length))
+                                            message.errorSamples = [];
+                                        message.errorSamples.push($root.google.rpc.Status.decode(reader, reader.uint32()));
                                         break;
                                     }
                                 case 2: {
-                                        message.databaseId = reader.string();
+                                        message.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.decode(reader, reader.uint32());
                                         break;
                                     }
                                 case 3: {
-                                        message.collectionId = reader.string();
+                                        message.joinedEventsCount = reader.int64();
                                         break;
                                     }
                                 case 4: {
-                                        message.gcsStagingDir = reader.string();
+                                        message.unjoinedEventsCount = reader.int64();
                                         break;
                                     }
                                 default:
@@ -9960,147 +13001,201 @@
                         };
     
                         /**
-                         * Decodes a FirestoreSource message from the specified reader or buffer, length delimited.
+                         * Decodes an ImportUserEventsResponse message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.FirestoreSource} FirestoreSource
+                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsResponse} ImportUserEventsResponse
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        FirestoreSource.decodeDelimited = function decodeDelimited(reader) {
+                        ImportUserEventsResponse.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a FirestoreSource message.
+                         * Verifies an ImportUserEventsResponse message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        FirestoreSource.verify = function verify(message) {
+                        ImportUserEventsResponse.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            if (message.projectId != null && message.hasOwnProperty("projectId"))
-                                if (!$util.isString(message.projectId))
-                                    return "projectId: string expected";
-                            if (message.databaseId != null && message.hasOwnProperty("databaseId"))
-                                if (!$util.isString(message.databaseId))
-                                    return "databaseId: string expected";
-                            if (message.collectionId != null && message.hasOwnProperty("collectionId"))
-                                if (!$util.isString(message.collectionId))
-                                    return "collectionId: string expected";
-                            if (message.gcsStagingDir != null && message.hasOwnProperty("gcsStagingDir"))
-                                if (!$util.isString(message.gcsStagingDir))
-                                    return "gcsStagingDir: string expected";
+                            if (message.errorSamples != null && message.hasOwnProperty("errorSamples")) {
+                                if (!Array.isArray(message.errorSamples))
+                                    return "errorSamples: array expected";
+                                for (var i = 0; i < message.errorSamples.length; ++i) {
+                                    var error = $root.google.rpc.Status.verify(message.errorSamples[i]);
+                                    if (error)
+                                        return "errorSamples." + error;
+                                }
+                            }
+                            if (message.errorConfig != null && message.hasOwnProperty("errorConfig")) {
+                                var error = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.verify(message.errorConfig);
+                                if (error)
+                                    return "errorConfig." + error;
+                            }
+                            if (message.joinedEventsCount != null && message.hasOwnProperty("joinedEventsCount"))
+                                if (!$util.isInteger(message.joinedEventsCount) && !(message.joinedEventsCount && $util.isInteger(message.joinedEventsCount.low) && $util.isInteger(message.joinedEventsCount.high)))
+                                    return "joinedEventsCount: integer|Long expected";
+                            if (message.unjoinedEventsCount != null && message.hasOwnProperty("unjoinedEventsCount"))
+                                if (!$util.isInteger(message.unjoinedEventsCount) && !(message.unjoinedEventsCount && $util.isInteger(message.unjoinedEventsCount.low) && $util.isInteger(message.unjoinedEventsCount.high)))
+                                    return "unjoinedEventsCount: integer|Long expected";
                             return null;
                         };
     
                         /**
-                         * Creates a FirestoreSource message from a plain object. Also converts values to their respective internal types.
+                         * Creates an ImportUserEventsResponse message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.FirestoreSource} FirestoreSource
+                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsResponse} ImportUserEventsResponse
                          */
-                        FirestoreSource.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.FirestoreSource)
+                        ImportUserEventsResponse.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.ImportUserEventsResponse)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.FirestoreSource();
-                            if (object.projectId != null)
-                                message.projectId = String(object.projectId);
-                            if (object.databaseId != null)
-                                message.databaseId = String(object.databaseId);
-                            if (object.collectionId != null)
-                                message.collectionId = String(object.collectionId);
-                            if (object.gcsStagingDir != null)
-                                message.gcsStagingDir = String(object.gcsStagingDir);
+                            var message = new $root.google.cloud.discoveryengine.v1.ImportUserEventsResponse();
+                            if (object.errorSamples) {
+                                if (!Array.isArray(object.errorSamples))
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportUserEventsResponse.errorSamples: array expected");
+                                message.errorSamples = [];
+                                for (var i = 0; i < object.errorSamples.length; ++i) {
+                                    if (typeof object.errorSamples[i] !== "object")
+                                        throw TypeError(".google.cloud.discoveryengine.v1.ImportUserEventsResponse.errorSamples: object expected");
+                                    message.errorSamples[i] = $root.google.rpc.Status.fromObject(object.errorSamples[i]);
+                                }
+                            }
+                            if (object.errorConfig != null) {
+                                if (typeof object.errorConfig !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportUserEventsResponse.errorConfig: object expected");
+                                message.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.fromObject(object.errorConfig);
+                            }
+                            if (object.joinedEventsCount != null)
+                                if ($util.Long)
+                                    (message.joinedEventsCount = $util.Long.fromValue(object.joinedEventsCount)).unsigned = false;
+                                else if (typeof object.joinedEventsCount === "string")
+                                    message.joinedEventsCount = parseInt(object.joinedEventsCount, 10);
+                                else if (typeof object.joinedEventsCount === "number")
+                                    message.joinedEventsCount = object.joinedEventsCount;
+                                else if (typeof object.joinedEventsCount === "object")
+                                    message.joinedEventsCount = new $util.LongBits(object.joinedEventsCount.low >>> 0, object.joinedEventsCount.high >>> 0).toNumber();
+                            if (object.unjoinedEventsCount != null)
+                                if ($util.Long)
+                                    (message.unjoinedEventsCount = $util.Long.fromValue(object.unjoinedEventsCount)).unsigned = false;
+                                else if (typeof object.unjoinedEventsCount === "string")
+                                    message.unjoinedEventsCount = parseInt(object.unjoinedEventsCount, 10);
+                                else if (typeof object.unjoinedEventsCount === "number")
+                                    message.unjoinedEventsCount = object.unjoinedEventsCount;
+                                else if (typeof object.unjoinedEventsCount === "object")
+                                    message.unjoinedEventsCount = new $util.LongBits(object.unjoinedEventsCount.low >>> 0, object.unjoinedEventsCount.high >>> 0).toNumber();
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a FirestoreSource message. Also converts values to other types if specified.
+                         * Creates a plain object from an ImportUserEventsResponse message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.FirestoreSource} message FirestoreSource
+                         * @param {google.cloud.discoveryengine.v1.ImportUserEventsResponse} message ImportUserEventsResponse
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        FirestoreSource.toObject = function toObject(message, options) {
+                        ImportUserEventsResponse.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
+                            if (options.arrays || options.defaults)
+                                object.errorSamples = [];
                             if (options.defaults) {
-                                object.projectId = "";
-                                object.databaseId = "";
-                                object.collectionId = "";
-                                object.gcsStagingDir = "";
+                                object.errorConfig = null;
+                                if ($util.Long) {
+                                    var long = new $util.Long(0, 0, false);
+                                    object.joinedEventsCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
+                                } else
+                                    object.joinedEventsCount = options.longs === String ? "0" : 0;
+                                if ($util.Long) {
+                                    var long = new $util.Long(0, 0, false);
+                                    object.unjoinedEventsCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
+                                } else
+                                    object.unjoinedEventsCount = options.longs === String ? "0" : 0;
                             }
-                            if (message.projectId != null && message.hasOwnProperty("projectId"))
-                                object.projectId = message.projectId;
-                            if (message.databaseId != null && message.hasOwnProperty("databaseId"))
-                                object.databaseId = message.databaseId;
-                            if (message.collectionId != null && message.hasOwnProperty("collectionId"))
-                                object.collectionId = message.collectionId;
-                            if (message.gcsStagingDir != null && message.hasOwnProperty("gcsStagingDir"))
-                                object.gcsStagingDir = message.gcsStagingDir;
+                            if (message.errorSamples && message.errorSamples.length) {
+                                object.errorSamples = [];
+                                for (var j = 0; j < message.errorSamples.length; ++j)
+                                    object.errorSamples[j] = $root.google.rpc.Status.toObject(message.errorSamples[j], options);
+                            }
+                            if (message.errorConfig != null && message.hasOwnProperty("errorConfig"))
+                                object.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.toObject(message.errorConfig, options);
+                            if (message.joinedEventsCount != null && message.hasOwnProperty("joinedEventsCount"))
+                                if (typeof message.joinedEventsCount === "number")
+                                    object.joinedEventsCount = options.longs === String ? String(message.joinedEventsCount) : message.joinedEventsCount;
+                                else
+                                    object.joinedEventsCount = options.longs === String ? $util.Long.prototype.toString.call(message.joinedEventsCount) : options.longs === Number ? new $util.LongBits(message.joinedEventsCount.low >>> 0, message.joinedEventsCount.high >>> 0).toNumber() : message.joinedEventsCount;
+                            if (message.unjoinedEventsCount != null && message.hasOwnProperty("unjoinedEventsCount"))
+                                if (typeof message.unjoinedEventsCount === "number")
+                                    object.unjoinedEventsCount = options.longs === String ? String(message.unjoinedEventsCount) : message.unjoinedEventsCount;
+                                else
+                                    object.unjoinedEventsCount = options.longs === String ? $util.Long.prototype.toString.call(message.unjoinedEventsCount) : options.longs === Number ? new $util.LongBits(message.unjoinedEventsCount.low >>> 0, message.unjoinedEventsCount.high >>> 0).toNumber() : message.unjoinedEventsCount;
                             return object;
                         };
     
                         /**
-                         * Converts this FirestoreSource to JSON.
+                         * Converts this ImportUserEventsResponse to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        FirestoreSource.prototype.toJSON = function toJSON() {
+                        ImportUserEventsResponse.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for FirestoreSource
+                         * Gets the default type url for ImportUserEventsResponse
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.FirestoreSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        FirestoreSource.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        ImportUserEventsResponse.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.FirestoreSource";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportUserEventsResponse";
                         };
     
-                        return FirestoreSource;
+                        return ImportUserEventsResponse;
                     })();
     
-                    v1.ImportErrorConfig = (function() {
+                    v1.ImportUserEventsMetadata = (function() {
     
                         /**
-                         * Properties of an ImportErrorConfig.
+                         * Properties of an ImportUserEventsMetadata.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IImportErrorConfig
-                         * @property {string|null} [gcsPrefix] ImportErrorConfig gcsPrefix
+                         * @interface IImportUserEventsMetadata
+                         * @property {google.protobuf.ITimestamp|null} [createTime] ImportUserEventsMetadata createTime
+                         * @property {google.protobuf.ITimestamp|null} [updateTime] ImportUserEventsMetadata updateTime
+                         * @property {number|Long|null} [successCount] ImportUserEventsMetadata successCount
+                         * @property {number|Long|null} [failureCount] ImportUserEventsMetadata failureCount
                          */
     
                         /**
-                         * Constructs a new ImportErrorConfig.
+                         * Constructs a new ImportUserEventsMetadata.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents an ImportErrorConfig.
-                         * @implements IImportErrorConfig
+                         * @classdesc Represents an ImportUserEventsMetadata.
+                         * @implements IImportUserEventsMetadata
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IImportErrorConfig=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsMetadata=} [properties] Properties to set
                          */
-                        function ImportErrorConfig(properties) {
+                        function ImportUserEventsMetadata(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -10108,89 +13203,117 @@
                         }
     
                         /**
-                         * ImportErrorConfig gcsPrefix.
-                         * @member {string|null|undefined} gcsPrefix
-                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
+                         * ImportUserEventsMetadata createTime.
+                         * @member {google.protobuf.ITimestamp|null|undefined} createTime
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
                          * @instance
                          */
-                        ImportErrorConfig.prototype.gcsPrefix = null;
+                        ImportUserEventsMetadata.prototype.createTime = null;
     
-                        // OneOf field names bound to virtual getters and setters
-                        var $oneOfFields;
+                        /**
+                         * ImportUserEventsMetadata updateTime.
+                         * @member {google.protobuf.ITimestamp|null|undefined} updateTime
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
+                         * @instance
+                         */
+                        ImportUserEventsMetadata.prototype.updateTime = null;
     
                         /**
-                         * ImportErrorConfig destination.
-                         * @member {"gcsPrefix"|undefined} destination
-                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
+                         * ImportUserEventsMetadata successCount.
+                         * @member {number|Long} successCount
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
                          * @instance
                          */
-                        Object.defineProperty(ImportErrorConfig.prototype, "destination", {
-                            get: $util.oneOfGetter($oneOfFields = ["gcsPrefix"]),
-                            set: $util.oneOfSetter($oneOfFields)
-                        });
+                        ImportUserEventsMetadata.prototype.successCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
     
                         /**
-                         * Creates a new ImportErrorConfig instance using the specified properties.
+                         * ImportUserEventsMetadata failureCount.
+                         * @member {number|Long} failureCount
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
+                         * @instance
+                         */
+                        ImportUserEventsMetadata.prototype.failureCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
+    
+                        /**
+                         * Creates a new ImportUserEventsMetadata instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportErrorConfig=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.ImportErrorConfig} ImportErrorConfig instance
+                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsMetadata=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsMetadata} ImportUserEventsMetadata instance
                          */
-                        ImportErrorConfig.create = function create(properties) {
-                            return new ImportErrorConfig(properties);
+                        ImportUserEventsMetadata.create = function create(properties) {
+                            return new ImportUserEventsMetadata(properties);
                         };
     
                         /**
-                         * Encodes the specified ImportErrorConfig message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportErrorConfig.verify|verify} messages.
+                         * Encodes the specified ImportUserEventsMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsMetadata.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportErrorConfig} message ImportErrorConfig message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsMetadata} message ImportUserEventsMetadata message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        ImportErrorConfig.encode = function encode(message, writer) {
+                        ImportUserEventsMetadata.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.gcsPrefix != null && Object.hasOwnProperty.call(message, "gcsPrefix"))
-                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.gcsPrefix);
+                            if (message.createTime != null && Object.hasOwnProperty.call(message, "createTime"))
+                                $root.google.protobuf.Timestamp.encode(message.createTime, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                            if (message.updateTime != null && Object.hasOwnProperty.call(message, "updateTime"))
+                                $root.google.protobuf.Timestamp.encode(message.updateTime, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                            if (message.successCount != null && Object.hasOwnProperty.call(message, "successCount"))
+                                writer.uint32(/* id 3, wireType 0 =*/24).int64(message.successCount);
+                            if (message.failureCount != null && Object.hasOwnProperty.call(message, "failureCount"))
+                                writer.uint32(/* id 4, wireType 0 =*/32).int64(message.failureCount);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified ImportErrorConfig message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportErrorConfig.verify|verify} messages.
+                         * Encodes the specified ImportUserEventsMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsMetadata.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportErrorConfig} message ImportErrorConfig message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsMetadata} message ImportUserEventsMetadata message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        ImportErrorConfig.encodeDelimited = function encodeDelimited(message, writer) {
+                        ImportUserEventsMetadata.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes an ImportErrorConfig message from the specified reader or buffer.
+                         * Decodes an ImportUserEventsMetadata message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.ImportErrorConfig} ImportErrorConfig
+                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsMetadata} ImportUserEventsMetadata
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        ImportErrorConfig.decode = function decode(reader, length) {
+                        ImportUserEventsMetadata.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportErrorConfig();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportUserEventsMetadata();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 1: {
-                                        message.gcsPrefix = reader.string();
+                                        message.createTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 2: {
+                                        message.updateTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 3: {
+                                        message.successCount = reader.int64();
+                                        break;
+                                    }
+                                case 4: {
+                                        message.failureCount = reader.int64();
                                         break;
                                     }
                                 default:
@@ -10202,130 +13325,189 @@
                         };
     
                         /**
-                         * Decodes an ImportErrorConfig message from the specified reader or buffer, length delimited.
+                         * Decodes an ImportUserEventsMetadata message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.ImportErrorConfig} ImportErrorConfig
+                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsMetadata} ImportUserEventsMetadata
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        ImportErrorConfig.decodeDelimited = function decodeDelimited(reader) {
+                        ImportUserEventsMetadata.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies an ImportErrorConfig message.
+                         * Verifies an ImportUserEventsMetadata message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        ImportErrorConfig.verify = function verify(message) {
+                        ImportUserEventsMetadata.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            var properties = {};
-                            if (message.gcsPrefix != null && message.hasOwnProperty("gcsPrefix")) {
-                                properties.destination = 1;
-                                if (!$util.isString(message.gcsPrefix))
-                                    return "gcsPrefix: string expected";
+                            if (message.createTime != null && message.hasOwnProperty("createTime")) {
+                                var error = $root.google.protobuf.Timestamp.verify(message.createTime);
+                                if (error)
+                                    return "createTime." + error;
+                            }
+                            if (message.updateTime != null && message.hasOwnProperty("updateTime")) {
+                                var error = $root.google.protobuf.Timestamp.verify(message.updateTime);
+                                if (error)
+                                    return "updateTime." + error;
                             }
+                            if (message.successCount != null && message.hasOwnProperty("successCount"))
+                                if (!$util.isInteger(message.successCount) && !(message.successCount && $util.isInteger(message.successCount.low) && $util.isInteger(message.successCount.high)))
+                                    return "successCount: integer|Long expected";
+                            if (message.failureCount != null && message.hasOwnProperty("failureCount"))
+                                if (!$util.isInteger(message.failureCount) && !(message.failureCount && $util.isInteger(message.failureCount.low) && $util.isInteger(message.failureCount.high)))
+                                    return "failureCount: integer|Long expected";
                             return null;
                         };
     
                         /**
-                         * Creates an ImportErrorConfig message from a plain object. Also converts values to their respective internal types.
+                         * Creates an ImportUserEventsMetadata message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.ImportErrorConfig} ImportErrorConfig
+                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsMetadata} ImportUserEventsMetadata
                          */
-                        ImportErrorConfig.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.ImportErrorConfig)
+                        ImportUserEventsMetadata.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.ImportUserEventsMetadata)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.ImportErrorConfig();
-                            if (object.gcsPrefix != null)
-                                message.gcsPrefix = String(object.gcsPrefix);
+                            var message = new $root.google.cloud.discoveryengine.v1.ImportUserEventsMetadata();
+                            if (object.createTime != null) {
+                                if (typeof object.createTime !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportUserEventsMetadata.createTime: object expected");
+                                message.createTime = $root.google.protobuf.Timestamp.fromObject(object.createTime);
+                            }
+                            if (object.updateTime != null) {
+                                if (typeof object.updateTime !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportUserEventsMetadata.updateTime: object expected");
+                                message.updateTime = $root.google.protobuf.Timestamp.fromObject(object.updateTime);
+                            }
+                            if (object.successCount != null)
+                                if ($util.Long)
+                                    (message.successCount = $util.Long.fromValue(object.successCount)).unsigned = false;
+                                else if (typeof object.successCount === "string")
+                                    message.successCount = parseInt(object.successCount, 10);
+                                else if (typeof object.successCount === "number")
+                                    message.successCount = object.successCount;
+                                else if (typeof object.successCount === "object")
+                                    message.successCount = new $util.LongBits(object.successCount.low >>> 0, object.successCount.high >>> 0).toNumber();
+                            if (object.failureCount != null)
+                                if ($util.Long)
+                                    (message.failureCount = $util.Long.fromValue(object.failureCount)).unsigned = false;
+                                else if (typeof object.failureCount === "string")
+                                    message.failureCount = parseInt(object.failureCount, 10);
+                                else if (typeof object.failureCount === "number")
+                                    message.failureCount = object.failureCount;
+                                else if (typeof object.failureCount === "object")
+                                    message.failureCount = new $util.LongBits(object.failureCount.low >>> 0, object.failureCount.high >>> 0).toNumber();
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from an ImportErrorConfig message. Also converts values to other types if specified.
+                         * Creates a plain object from an ImportUserEventsMetadata message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ImportErrorConfig} message ImportErrorConfig
+                         * @param {google.cloud.discoveryengine.v1.ImportUserEventsMetadata} message ImportUserEventsMetadata
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        ImportErrorConfig.toObject = function toObject(message, options) {
+                        ImportUserEventsMetadata.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
-                            if (message.gcsPrefix != null && message.hasOwnProperty("gcsPrefix")) {
-                                object.gcsPrefix = message.gcsPrefix;
-                                if (options.oneofs)
-                                    object.destination = "gcsPrefix";
+                            if (options.defaults) {
+                                object.createTime = null;
+                                object.updateTime = null;
+                                if ($util.Long) {
+                                    var long = new $util.Long(0, 0, false);
+                                    object.successCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
+                                } else
+                                    object.successCount = options.longs === String ? "0" : 0;
+                                if ($util.Long) {
+                                    var long = new $util.Long(0, 0, false);
+                                    object.failureCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
+                                } else
+                                    object.failureCount = options.longs === String ? "0" : 0;
                             }
+                            if (message.createTime != null && message.hasOwnProperty("createTime"))
+                                object.createTime = $root.google.protobuf.Timestamp.toObject(message.createTime, options);
+                            if (message.updateTime != null && message.hasOwnProperty("updateTime"))
+                                object.updateTime = $root.google.protobuf.Timestamp.toObject(message.updateTime, options);
+                            if (message.successCount != null && message.hasOwnProperty("successCount"))
+                                if (typeof message.successCount === "number")
+                                    object.successCount = options.longs === String ? String(message.successCount) : message.successCount;
+                                else
+                                    object.successCount = options.longs === String ? $util.Long.prototype.toString.call(message.successCount) : options.longs === Number ? new $util.LongBits(message.successCount.low >>> 0, message.successCount.high >>> 0).toNumber() : message.successCount;
+                            if (message.failureCount != null && message.hasOwnProperty("failureCount"))
+                                if (typeof message.failureCount === "number")
+                                    object.failureCount = options.longs === String ? String(message.failureCount) : message.failureCount;
+                                else
+                                    object.failureCount = options.longs === String ? $util.Long.prototype.toString.call(message.failureCount) : options.longs === Number ? new $util.LongBits(message.failureCount.low >>> 0, message.failureCount.high >>> 0).toNumber() : message.failureCount;
                             return object;
                         };
     
                         /**
-                         * Converts this ImportErrorConfig to JSON.
+                         * Converts this ImportUserEventsMetadata to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        ImportErrorConfig.prototype.toJSON = function toJSON() {
+                        ImportUserEventsMetadata.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for ImportErrorConfig
+                         * Gets the default type url for ImportUserEventsMetadata
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.ImportErrorConfig
+                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        ImportErrorConfig.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        ImportUserEventsMetadata.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportErrorConfig";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportUserEventsMetadata";
                         };
     
-                        return ImportErrorConfig;
+                        return ImportUserEventsMetadata;
                     })();
     
-                    v1.ImportUserEventsRequest = (function() {
+                    v1.ImportDocumentsMetadata = (function() {
     
                         /**
-                         * Properties of an ImportUserEventsRequest.
+                         * Properties of an ImportDocumentsMetadata.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IImportUserEventsRequest
-                         * @property {google.cloud.discoveryengine.v1.ImportUserEventsRequest.IInlineSource|null} [inlineSource] ImportUserEventsRequest inlineSource
-                         * @property {google.cloud.discoveryengine.v1.IGcsSource|null} [gcsSource] ImportUserEventsRequest gcsSource
-                         * @property {google.cloud.discoveryengine.v1.IBigQuerySource|null} [bigquerySource] ImportUserEventsRequest bigquerySource
-                         * @property {string|null} [parent] ImportUserEventsRequest parent
-                         * @property {google.cloud.discoveryengine.v1.IImportErrorConfig|null} [errorConfig] ImportUserEventsRequest errorConfig
+                         * @interface IImportDocumentsMetadata
+                         * @property {google.protobuf.ITimestamp|null} [createTime] ImportDocumentsMetadata createTime
+                         * @property {google.protobuf.ITimestamp|null} [updateTime] ImportDocumentsMetadata updateTime
+                         * @property {number|Long|null} [successCount] ImportDocumentsMetadata successCount
+                         * @property {number|Long|null} [failureCount] ImportDocumentsMetadata failureCount
+                         * @property {number|Long|null} [totalCount] ImportDocumentsMetadata totalCount
                          */
     
                         /**
-                         * Constructs a new ImportUserEventsRequest.
+                         * Constructs a new ImportDocumentsMetadata.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents an ImportUserEventsRequest.
-                         * @implements IImportUserEventsRequest
+                         * @classdesc Represents an ImportDocumentsMetadata.
+                         * @implements IImportDocumentsMetadata
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsRequest=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsMetadata=} [properties] Properties to set
                          */
-                        function ImportUserEventsRequest(properties) {
+                        function ImportDocumentsMetadata(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -10333,145 +13515,131 @@
                         }
     
                         /**
-                         * ImportUserEventsRequest inlineSource.
-                         * @member {google.cloud.discoveryengine.v1.ImportUserEventsRequest.IInlineSource|null|undefined} inlineSource
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
-                         * @instance
-                         */
-                        ImportUserEventsRequest.prototype.inlineSource = null;
-    
-                        /**
-                         * ImportUserEventsRequest gcsSource.
-                         * @member {google.cloud.discoveryengine.v1.IGcsSource|null|undefined} gcsSource
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
+                         * ImportDocumentsMetadata createTime.
+                         * @member {google.protobuf.ITimestamp|null|undefined} createTime
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
                          * @instance
                          */
-                        ImportUserEventsRequest.prototype.gcsSource = null;
+                        ImportDocumentsMetadata.prototype.createTime = null;
     
                         /**
-                         * ImportUserEventsRequest bigquerySource.
-                         * @member {google.cloud.discoveryengine.v1.IBigQuerySource|null|undefined} bigquerySource
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
+                         * ImportDocumentsMetadata updateTime.
+                         * @member {google.protobuf.ITimestamp|null|undefined} updateTime
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
                          * @instance
                          */
-                        ImportUserEventsRequest.prototype.bigquerySource = null;
+                        ImportDocumentsMetadata.prototype.updateTime = null;
     
                         /**
-                         * ImportUserEventsRequest parent.
-                         * @member {string} parent
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
+                         * ImportDocumentsMetadata successCount.
+                         * @member {number|Long} successCount
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
                          * @instance
                          */
-                        ImportUserEventsRequest.prototype.parent = "";
+                        ImportDocumentsMetadata.prototype.successCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
     
                         /**
-                         * ImportUserEventsRequest errorConfig.
-                         * @member {google.cloud.discoveryengine.v1.IImportErrorConfig|null|undefined} errorConfig
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
+                         * ImportDocumentsMetadata failureCount.
+                         * @member {number|Long} failureCount
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
                          * @instance
                          */
-                        ImportUserEventsRequest.prototype.errorConfig = null;
-    
-                        // OneOf field names bound to virtual getters and setters
-                        var $oneOfFields;
+                        ImportDocumentsMetadata.prototype.failureCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
     
                         /**
-                         * ImportUserEventsRequest source.
-                         * @member {"inlineSource"|"gcsSource"|"bigquerySource"|undefined} source
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
+                         * ImportDocumentsMetadata totalCount.
+                         * @member {number|Long} totalCount
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
                          * @instance
                          */
-                        Object.defineProperty(ImportUserEventsRequest.prototype, "source", {
-                            get: $util.oneOfGetter($oneOfFields = ["inlineSource", "gcsSource", "bigquerySource"]),
-                            set: $util.oneOfSetter($oneOfFields)
-                        });
+                        ImportDocumentsMetadata.prototype.totalCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
     
                         /**
-                         * Creates a new ImportUserEventsRequest instance using the specified properties.
+                         * Creates a new ImportDocumentsMetadata instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsRequest=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsRequest} ImportUserEventsRequest instance
+                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsMetadata=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsMetadata} ImportDocumentsMetadata instance
                          */
-                        ImportUserEventsRequest.create = function create(properties) {
-                            return new ImportUserEventsRequest(properties);
+                        ImportDocumentsMetadata.create = function create(properties) {
+                            return new ImportDocumentsMetadata(properties);
                         };
     
                         /**
-                         * Encodes the specified ImportUserEventsRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsRequest.verify|verify} messages.
+                         * Encodes the specified ImportDocumentsMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsMetadata.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsRequest} message ImportUserEventsRequest message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsMetadata} message ImportDocumentsMetadata message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        ImportUserEventsRequest.encode = function encode(message, writer) {
+                        ImportDocumentsMetadata.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.parent != null && Object.hasOwnProperty.call(message, "parent"))
-                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.parent);
-                            if (message.inlineSource != null && Object.hasOwnProperty.call(message, "inlineSource"))
-                                $root.google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource.encode(message.inlineSource, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
-                            if (message.gcsSource != null && Object.hasOwnProperty.call(message, "gcsSource"))
-                                $root.google.cloud.discoveryengine.v1.GcsSource.encode(message.gcsSource, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
-                            if (message.bigquerySource != null && Object.hasOwnProperty.call(message, "bigquerySource"))
-                                $root.google.cloud.discoveryengine.v1.BigQuerySource.encode(message.bigquerySource, writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
-                            if (message.errorConfig != null && Object.hasOwnProperty.call(message, "errorConfig"))
-                                $root.google.cloud.discoveryengine.v1.ImportErrorConfig.encode(message.errorConfig, writer.uint32(/* id 5, wireType 2 =*/42).fork()).ldelim();
+                            if (message.createTime != null && Object.hasOwnProperty.call(message, "createTime"))
+                                $root.google.protobuf.Timestamp.encode(message.createTime, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                            if (message.updateTime != null && Object.hasOwnProperty.call(message, "updateTime"))
+                                $root.google.protobuf.Timestamp.encode(message.updateTime, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                            if (message.successCount != null && Object.hasOwnProperty.call(message, "successCount"))
+                                writer.uint32(/* id 3, wireType 0 =*/24).int64(message.successCount);
+                            if (message.failureCount != null && Object.hasOwnProperty.call(message, "failureCount"))
+                                writer.uint32(/* id 4, wireType 0 =*/32).int64(message.failureCount);
+                            if (message.totalCount != null && Object.hasOwnProperty.call(message, "totalCount"))
+                                writer.uint32(/* id 5, wireType 0 =*/40).int64(message.totalCount);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified ImportUserEventsRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsRequest.verify|verify} messages.
+                         * Encodes the specified ImportDocumentsMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsMetadata.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsRequest} message ImportUserEventsRequest message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsMetadata} message ImportDocumentsMetadata message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        ImportUserEventsRequest.encodeDelimited = function encodeDelimited(message, writer) {
+                        ImportDocumentsMetadata.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes an ImportUserEventsRequest message from the specified reader or buffer.
+                         * Decodes an ImportDocumentsMetadata message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsRequest} ImportUserEventsRequest
+                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsMetadata} ImportDocumentsMetadata
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        ImportUserEventsRequest.decode = function decode(reader, length) {
+                        ImportDocumentsMetadata.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportUserEventsRequest();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportDocumentsMetadata();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
+                                case 1: {
+                                        message.createTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
+                                        break;
+                                    }
                                 case 2: {
-                                        message.inlineSource = $root.google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource.decode(reader, reader.uint32());
+                                        message.updateTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
                                         break;
                                     }
                                 case 3: {
-                                        message.gcsSource = $root.google.cloud.discoveryengine.v1.GcsSource.decode(reader, reader.uint32());
+                                        message.successCount = reader.int64();
                                         break;
                                     }
                                 case 4: {
-                                        message.bigquerySource = $root.google.cloud.discoveryengine.v1.BigQuerySource.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                case 1: {
-                                        message.parent = reader.string();
+                                        message.failureCount = reader.int64();
                                         break;
                                     }
                                 case 5: {
-                                        message.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.decode(reader, reader.uint32());
+                                        message.totalCount = reader.int64();
                                         break;
                                     }
                                 default:
@@ -10483,423 +13651,221 @@
                         };
     
                         /**
-                         * Decodes an ImportUserEventsRequest message from the specified reader or buffer, length delimited.
+                         * Decodes an ImportDocumentsMetadata message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsRequest} ImportUserEventsRequest
+                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsMetadata} ImportDocumentsMetadata
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        ImportUserEventsRequest.decodeDelimited = function decodeDelimited(reader) {
+                        ImportDocumentsMetadata.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies an ImportUserEventsRequest message.
+                         * Verifies an ImportDocumentsMetadata message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        ImportUserEventsRequest.verify = function verify(message) {
+                        ImportDocumentsMetadata.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            var properties = {};
-                            if (message.inlineSource != null && message.hasOwnProperty("inlineSource")) {
-                                properties.source = 1;
-                                {
-                                    var error = $root.google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource.verify(message.inlineSource);
-                                    if (error)
-                                        return "inlineSource." + error;
-                                }
-                            }
-                            if (message.gcsSource != null && message.hasOwnProperty("gcsSource")) {
-                                if (properties.source === 1)
-                                    return "source: multiple values";
-                                properties.source = 1;
-                                {
-                                    var error = $root.google.cloud.discoveryengine.v1.GcsSource.verify(message.gcsSource);
-                                    if (error)
-                                        return "gcsSource." + error;
-                                }
-                            }
-                            if (message.bigquerySource != null && message.hasOwnProperty("bigquerySource")) {
-                                if (properties.source === 1)
-                                    return "source: multiple values";
-                                properties.source = 1;
-                                {
-                                    var error = $root.google.cloud.discoveryengine.v1.BigQuerySource.verify(message.bigquerySource);
-                                    if (error)
-                                        return "bigquerySource." + error;
-                                }
+                            if (message.createTime != null && message.hasOwnProperty("createTime")) {
+                                var error = $root.google.protobuf.Timestamp.verify(message.createTime);
+                                if (error)
+                                    return "createTime." + error;
                             }
-                            if (message.parent != null && message.hasOwnProperty("parent"))
-                                if (!$util.isString(message.parent))
-                                    return "parent: string expected";
-                            if (message.errorConfig != null && message.hasOwnProperty("errorConfig")) {
-                                var error = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.verify(message.errorConfig);
+                            if (message.updateTime != null && message.hasOwnProperty("updateTime")) {
+                                var error = $root.google.protobuf.Timestamp.verify(message.updateTime);
                                 if (error)
-                                    return "errorConfig." + error;
+                                    return "updateTime." + error;
                             }
+                            if (message.successCount != null && message.hasOwnProperty("successCount"))
+                                if (!$util.isInteger(message.successCount) && !(message.successCount && $util.isInteger(message.successCount.low) && $util.isInteger(message.successCount.high)))
+                                    return "successCount: integer|Long expected";
+                            if (message.failureCount != null && message.hasOwnProperty("failureCount"))
+                                if (!$util.isInteger(message.failureCount) && !(message.failureCount && $util.isInteger(message.failureCount.low) && $util.isInteger(message.failureCount.high)))
+                                    return "failureCount: integer|Long expected";
+                            if (message.totalCount != null && message.hasOwnProperty("totalCount"))
+                                if (!$util.isInteger(message.totalCount) && !(message.totalCount && $util.isInteger(message.totalCount.low) && $util.isInteger(message.totalCount.high)))
+                                    return "totalCount: integer|Long expected";
                             return null;
                         };
     
                         /**
-                         * Creates an ImportUserEventsRequest message from a plain object. Also converts values to their respective internal types.
+                         * Creates an ImportDocumentsMetadata message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsRequest} ImportUserEventsRequest
+                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsMetadata} ImportDocumentsMetadata
                          */
-                        ImportUserEventsRequest.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.ImportUserEventsRequest)
+                        ImportDocumentsMetadata.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.ImportDocumentsMetadata)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.ImportUserEventsRequest();
-                            if (object.inlineSource != null) {
-                                if (typeof object.inlineSource !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportUserEventsRequest.inlineSource: object expected");
-                                message.inlineSource = $root.google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource.fromObject(object.inlineSource);
-                            }
-                            if (object.gcsSource != null) {
-                                if (typeof object.gcsSource !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportUserEventsRequest.gcsSource: object expected");
-                                message.gcsSource = $root.google.cloud.discoveryengine.v1.GcsSource.fromObject(object.gcsSource);
-                            }
-                            if (object.bigquerySource != null) {
-                                if (typeof object.bigquerySource !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportUserEventsRequest.bigquerySource: object expected");
-                                message.bigquerySource = $root.google.cloud.discoveryengine.v1.BigQuerySource.fromObject(object.bigquerySource);
+                            var message = new $root.google.cloud.discoveryengine.v1.ImportDocumentsMetadata();
+                            if (object.createTime != null) {
+                                if (typeof object.createTime !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsMetadata.createTime: object expected");
+                                message.createTime = $root.google.protobuf.Timestamp.fromObject(object.createTime);
                             }
-                            if (object.parent != null)
-                                message.parent = String(object.parent);
-                            if (object.errorConfig != null) {
-                                if (typeof object.errorConfig !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportUserEventsRequest.errorConfig: object expected");
-                                message.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.fromObject(object.errorConfig);
+                            if (object.updateTime != null) {
+                                if (typeof object.updateTime !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsMetadata.updateTime: object expected");
+                                message.updateTime = $root.google.protobuf.Timestamp.fromObject(object.updateTime);
                             }
+                            if (object.successCount != null)
+                                if ($util.Long)
+                                    (message.successCount = $util.Long.fromValue(object.successCount)).unsigned = false;
+                                else if (typeof object.successCount === "string")
+                                    message.successCount = parseInt(object.successCount, 10);
+                                else if (typeof object.successCount === "number")
+                                    message.successCount = object.successCount;
+                                else if (typeof object.successCount === "object")
+                                    message.successCount = new $util.LongBits(object.successCount.low >>> 0, object.successCount.high >>> 0).toNumber();
+                            if (object.failureCount != null)
+                                if ($util.Long)
+                                    (message.failureCount = $util.Long.fromValue(object.failureCount)).unsigned = false;
+                                else if (typeof object.failureCount === "string")
+                                    message.failureCount = parseInt(object.failureCount, 10);
+                                else if (typeof object.failureCount === "number")
+                                    message.failureCount = object.failureCount;
+                                else if (typeof object.failureCount === "object")
+                                    message.failureCount = new $util.LongBits(object.failureCount.low >>> 0, object.failureCount.high >>> 0).toNumber();
+                            if (object.totalCount != null)
+                                if ($util.Long)
+                                    (message.totalCount = $util.Long.fromValue(object.totalCount)).unsigned = false;
+                                else if (typeof object.totalCount === "string")
+                                    message.totalCount = parseInt(object.totalCount, 10);
+                                else if (typeof object.totalCount === "number")
+                                    message.totalCount = object.totalCount;
+                                else if (typeof object.totalCount === "object")
+                                    message.totalCount = new $util.LongBits(object.totalCount.low >>> 0, object.totalCount.high >>> 0).toNumber();
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from an ImportUserEventsRequest message. Also converts values to other types if specified.
+                         * Creates a plain object from an ImportDocumentsMetadata message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ImportUserEventsRequest} message ImportUserEventsRequest
+                         * @param {google.cloud.discoveryengine.v1.ImportDocumentsMetadata} message ImportDocumentsMetadata
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        ImportUserEventsRequest.toObject = function toObject(message, options) {
-                            if (!options)
-                                options = {};
-                            var object = {};
-                            if (options.defaults) {
-                                object.parent = "";
-                                object.errorConfig = null;
-                            }
-                            if (message.parent != null && message.hasOwnProperty("parent"))
-                                object.parent = message.parent;
-                            if (message.inlineSource != null && message.hasOwnProperty("inlineSource")) {
-                                object.inlineSource = $root.google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource.toObject(message.inlineSource, options);
-                                if (options.oneofs)
-                                    object.source = "inlineSource";
-                            }
-                            if (message.gcsSource != null && message.hasOwnProperty("gcsSource")) {
-                                object.gcsSource = $root.google.cloud.discoveryengine.v1.GcsSource.toObject(message.gcsSource, options);
-                                if (options.oneofs)
-                                    object.source = "gcsSource";
-                            }
-                            if (message.bigquerySource != null && message.hasOwnProperty("bigquerySource")) {
-                                object.bigquerySource = $root.google.cloud.discoveryengine.v1.BigQuerySource.toObject(message.bigquerySource, options);
-                                if (options.oneofs)
-                                    object.source = "bigquerySource";
-                            }
-                            if (message.errorConfig != null && message.hasOwnProperty("errorConfig"))
-                                object.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.toObject(message.errorConfig, options);
-                            return object;
-                        };
-    
-                        /**
-                         * Converts this ImportUserEventsRequest to JSON.
-                         * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
-                         * @instance
-                         * @returns {Object.<string,*>} JSON object
-                         */
-                        ImportUserEventsRequest.prototype.toJSON = function toJSON() {
-                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
-                        };
-    
-                        /**
-                         * Gets the default type url for ImportUserEventsRequest
-                         * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
-                         * @static
-                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                         * @returns {string} The default type url
-                         */
-                        ImportUserEventsRequest.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
-                            if (typeUrlPrefix === undefined) {
-                                typeUrlPrefix = "type.googleapis.com";
-                            }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportUserEventsRequest";
-                        };
-    
-                        ImportUserEventsRequest.InlineSource = (function() {
-    
-                            /**
-                             * Properties of an InlineSource.
-                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
-                             * @interface IInlineSource
-                             * @property {Array.<google.cloud.discoveryengine.v1.IUserEvent>|null} [userEvents] InlineSource userEvents
-                             */
-    
-                            /**
-                             * Constructs a new InlineSource.
-                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest
-                             * @classdesc Represents an InlineSource.
-                             * @implements IInlineSource
-                             * @constructor
-                             * @param {google.cloud.discoveryengine.v1.ImportUserEventsRequest.IInlineSource=} [properties] Properties to set
-                             */
-                            function InlineSource(properties) {
-                                this.userEvents = [];
-                                if (properties)
-                                    for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
-                                        if (properties[keys[i]] != null)
-                                            this[keys[i]] = properties[keys[i]];
-                            }
-    
-                            /**
-                             * InlineSource userEvents.
-                             * @member {Array.<google.cloud.discoveryengine.v1.IUserEvent>} userEvents
-                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource
-                             * @instance
-                             */
-                            InlineSource.prototype.userEvents = $util.emptyArray;
-    
-                            /**
-                             * Creates a new InlineSource instance using the specified properties.
-                             * @function create
-                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource
-                             * @static
-                             * @param {google.cloud.discoveryengine.v1.ImportUserEventsRequest.IInlineSource=} [properties] Properties to set
-                             * @returns {google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource} InlineSource instance
-                             */
-                            InlineSource.create = function create(properties) {
-                                return new InlineSource(properties);
-                            };
-    
-                            /**
-                             * Encodes the specified InlineSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource.verify|verify} messages.
-                             * @function encode
-                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource
-                             * @static
-                             * @param {google.cloud.discoveryengine.v1.ImportUserEventsRequest.IInlineSource} message InlineSource message or plain object to encode
-                             * @param {$protobuf.Writer} [writer] Writer to encode to
-                             * @returns {$protobuf.Writer} Writer
-                             */
-                            InlineSource.encode = function encode(message, writer) {
-                                if (!writer)
-                                    writer = $Writer.create();
-                                if (message.userEvents != null && message.userEvents.length)
-                                    for (var i = 0; i < message.userEvents.length; ++i)
-                                        $root.google.cloud.discoveryengine.v1.UserEvent.encode(message.userEvents[i], writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
-                                return writer;
-                            };
-    
-                            /**
-                             * Encodes the specified InlineSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource.verify|verify} messages.
-                             * @function encodeDelimited
-                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource
-                             * @static
-                             * @param {google.cloud.discoveryengine.v1.ImportUserEventsRequest.IInlineSource} message InlineSource message or plain object to encode
-                             * @param {$protobuf.Writer} [writer] Writer to encode to
-                             * @returns {$protobuf.Writer} Writer
-                             */
-                            InlineSource.encodeDelimited = function encodeDelimited(message, writer) {
-                                return this.encode(message, writer).ldelim();
-                            };
-    
-                            /**
-                             * Decodes an InlineSource message from the specified reader or buffer.
-                             * @function decode
-                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource
-                             * @static
-                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                             * @param {number} [length] Message length if known beforehand
-                             * @returns {google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource} InlineSource
-                             * @throws {Error} If the payload is not a reader or valid buffer
-                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                             */
-                            InlineSource.decode = function decode(reader, length) {
-                                if (!(reader instanceof $Reader))
-                                    reader = $Reader.create(reader);
-                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource();
-                                while (reader.pos < end) {
-                                    var tag = reader.uint32();
-                                    switch (tag >>> 3) {
-                                    case 1: {
-                                            if (!(message.userEvents && message.userEvents.length))
-                                                message.userEvents = [];
-                                            message.userEvents.push($root.google.cloud.discoveryengine.v1.UserEvent.decode(reader, reader.uint32()));
-                                            break;
-                                        }
-                                    default:
-                                        reader.skipType(tag & 7);
-                                        break;
-                                    }
-                                }
-                                return message;
-                            };
-    
-                            /**
-                             * Decodes an InlineSource message from the specified reader or buffer, length delimited.
-                             * @function decodeDelimited
-                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource
-                             * @static
-                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                             * @returns {google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource} InlineSource
-                             * @throws {Error} If the payload is not a reader or valid buffer
-                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                             */
-                            InlineSource.decodeDelimited = function decodeDelimited(reader) {
-                                if (!(reader instanceof $Reader))
-                                    reader = new $Reader(reader);
-                                return this.decode(reader, reader.uint32());
-                            };
-    
-                            /**
-                             * Verifies an InlineSource message.
-                             * @function verify
-                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource
-                             * @static
-                             * @param {Object.<string,*>} message Plain object to verify
-                             * @returns {string|null} `null` if valid, otherwise the reason why it is not
-                             */
-                            InlineSource.verify = function verify(message) {
-                                if (typeof message !== "object" || message === null)
-                                    return "object expected";
-                                if (message.userEvents != null && message.hasOwnProperty("userEvents")) {
-                                    if (!Array.isArray(message.userEvents))
-                                        return "userEvents: array expected";
-                                    for (var i = 0; i < message.userEvents.length; ++i) {
-                                        var error = $root.google.cloud.discoveryengine.v1.UserEvent.verify(message.userEvents[i]);
-                                        if (error)
-                                            return "userEvents." + error;
-                                    }
-                                }
-                                return null;
-                            };
-    
-                            /**
-                             * Creates an InlineSource message from a plain object. Also converts values to their respective internal types.
-                             * @function fromObject
-                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource
-                             * @static
-                             * @param {Object.<string,*>} object Plain object
-                             * @returns {google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource} InlineSource
-                             */
-                            InlineSource.fromObject = function fromObject(object) {
-                                if (object instanceof $root.google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource)
-                                    return object;
-                                var message = new $root.google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource();
-                                if (object.userEvents) {
-                                    if (!Array.isArray(object.userEvents))
-                                        throw TypeError(".google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource.userEvents: array expected");
-                                    message.userEvents = [];
-                                    for (var i = 0; i < object.userEvents.length; ++i) {
-                                        if (typeof object.userEvents[i] !== "object")
-                                            throw TypeError(".google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource.userEvents: object expected");
-                                        message.userEvents[i] = $root.google.cloud.discoveryengine.v1.UserEvent.fromObject(object.userEvents[i]);
-                                    }
-                                }
-                                return message;
-                            };
-    
-                            /**
-                             * Creates a plain object from an InlineSource message. Also converts values to other types if specified.
-                             * @function toObject
-                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource
-                             * @static
-                             * @param {google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource} message InlineSource
-                             * @param {$protobuf.IConversionOptions} [options] Conversion options
-                             * @returns {Object.<string,*>} Plain object
-                             */
-                            InlineSource.toObject = function toObject(message, options) {
-                                if (!options)
-                                    options = {};
-                                var object = {};
-                                if (options.arrays || options.defaults)
-                                    object.userEvents = [];
-                                if (message.userEvents && message.userEvents.length) {
-                                    object.userEvents = [];
-                                    for (var j = 0; j < message.userEvents.length; ++j)
-                                        object.userEvents[j] = $root.google.cloud.discoveryengine.v1.UserEvent.toObject(message.userEvents[j], options);
-                                }
-                                return object;
-                            };
-    
-                            /**
-                             * Converts this InlineSource to JSON.
-                             * @function toJSON
-                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource
-                             * @instance
-                             * @returns {Object.<string,*>} JSON object
-                             */
-                            InlineSource.prototype.toJSON = function toJSON() {
-                                return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
-                            };
+                        ImportDocumentsMetadata.toObject = function toObject(message, options) {
+                            if (!options)
+                                options = {};
+                            var object = {};
+                            if (options.defaults) {
+                                object.createTime = null;
+                                object.updateTime = null;
+                                if ($util.Long) {
+                                    var long = new $util.Long(0, 0, false);
+                                    object.successCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
+                                } else
+                                    object.successCount = options.longs === String ? "0" : 0;
+                                if ($util.Long) {
+                                    var long = new $util.Long(0, 0, false);
+                                    object.failureCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
+                                } else
+                                    object.failureCount = options.longs === String ? "0" : 0;
+                                if ($util.Long) {
+                                    var long = new $util.Long(0, 0, false);
+                                    object.totalCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
+                                } else
+                                    object.totalCount = options.longs === String ? "0" : 0;
+                            }
+                            if (message.createTime != null && message.hasOwnProperty("createTime"))
+                                object.createTime = $root.google.protobuf.Timestamp.toObject(message.createTime, options);
+                            if (message.updateTime != null && message.hasOwnProperty("updateTime"))
+                                object.updateTime = $root.google.protobuf.Timestamp.toObject(message.updateTime, options);
+                            if (message.successCount != null && message.hasOwnProperty("successCount"))
+                                if (typeof message.successCount === "number")
+                                    object.successCount = options.longs === String ? String(message.successCount) : message.successCount;
+                                else
+                                    object.successCount = options.longs === String ? $util.Long.prototype.toString.call(message.successCount) : options.longs === Number ? new $util.LongBits(message.successCount.low >>> 0, message.successCount.high >>> 0).toNumber() : message.successCount;
+                            if (message.failureCount != null && message.hasOwnProperty("failureCount"))
+                                if (typeof message.failureCount === "number")
+                                    object.failureCount = options.longs === String ? String(message.failureCount) : message.failureCount;
+                                else
+                                    object.failureCount = options.longs === String ? $util.Long.prototype.toString.call(message.failureCount) : options.longs === Number ? new $util.LongBits(message.failureCount.low >>> 0, message.failureCount.high >>> 0).toNumber() : message.failureCount;
+                            if (message.totalCount != null && message.hasOwnProperty("totalCount"))
+                                if (typeof message.totalCount === "number")
+                                    object.totalCount = options.longs === String ? String(message.totalCount) : message.totalCount;
+                                else
+                                    object.totalCount = options.longs === String ? $util.Long.prototype.toString.call(message.totalCount) : options.longs === Number ? new $util.LongBits(message.totalCount.low >>> 0, message.totalCount.high >>> 0).toNumber() : message.totalCount;
+                            return object;
+                        };
     
-                            /**
-                             * Gets the default type url for InlineSource
-                             * @function getTypeUrl
-                             * @memberof google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource
-                             * @static
-                             * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                             * @returns {string} The default type url
-                             */
-                            InlineSource.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
-                                if (typeUrlPrefix === undefined) {
-                                    typeUrlPrefix = "type.googleapis.com";
-                                }
-                                return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportUserEventsRequest.InlineSource";
-                            };
+                        /**
+                         * Converts this ImportDocumentsMetadata to JSON.
+                         * @function toJSON
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
+                         * @instance
+                         * @returns {Object.<string,*>} JSON object
+                         */
+                        ImportDocumentsMetadata.prototype.toJSON = function toJSON() {
+                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                        };
     
-                            return InlineSource;
-                        })();
+                        /**
+                         * Gets the default type url for ImportDocumentsMetadata
+                         * @function getTypeUrl
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
+                         * @static
+                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns {string} The default type url
+                         */
+                        ImportDocumentsMetadata.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                            if (typeUrlPrefix === undefined) {
+                                typeUrlPrefix = "type.googleapis.com";
+                            }
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportDocumentsMetadata";
+                        };
     
-                        return ImportUserEventsRequest;
+                        return ImportDocumentsMetadata;
                     })();
     
-                    v1.ImportUserEventsResponse = (function() {
+                    v1.ImportDocumentsRequest = (function() {
     
                         /**
-                         * Properties of an ImportUserEventsResponse.
+                         * Properties of an ImportDocumentsRequest.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IImportUserEventsResponse
-                         * @property {Array.<google.rpc.IStatus>|null} [errorSamples] ImportUserEventsResponse errorSamples
-                         * @property {google.cloud.discoveryengine.v1.IImportErrorConfig|null} [errorConfig] ImportUserEventsResponse errorConfig
-                         * @property {number|Long|null} [joinedEventsCount] ImportUserEventsResponse joinedEventsCount
-                         * @property {number|Long|null} [unjoinedEventsCount] ImportUserEventsResponse unjoinedEventsCount
+                         * @interface IImportDocumentsRequest
+                         * @property {google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource|null} [inlineSource] ImportDocumentsRequest inlineSource
+                         * @property {google.cloud.discoveryengine.v1.IGcsSource|null} [gcsSource] ImportDocumentsRequest gcsSource
+                         * @property {google.cloud.discoveryengine.v1.IBigQuerySource|null} [bigquerySource] ImportDocumentsRequest bigquerySource
+                         * @property {google.cloud.discoveryengine.v1.IFhirStoreSource|null} [fhirStoreSource] ImportDocumentsRequest fhirStoreSource
+                         * @property {google.cloud.discoveryengine.v1.ISpannerSource|null} [spannerSource] ImportDocumentsRequest spannerSource
+                         * @property {google.cloud.discoveryengine.v1.ICloudSqlSource|null} [cloudSqlSource] ImportDocumentsRequest cloudSqlSource
+                         * @property {google.cloud.discoveryengine.v1.IFirestoreSource|null} [firestoreSource] ImportDocumentsRequest firestoreSource
+                         * @property {google.cloud.discoveryengine.v1.IAlloyDbSource|null} [alloyDbSource] ImportDocumentsRequest alloyDbSource
+                         * @property {google.cloud.discoveryengine.v1.IBigtableSource|null} [bigtableSource] ImportDocumentsRequest bigtableSource
+                         * @property {string|null} [parent] ImportDocumentsRequest parent
+                         * @property {google.cloud.discoveryengine.v1.IImportErrorConfig|null} [errorConfig] ImportDocumentsRequest errorConfig
+                         * @property {google.cloud.discoveryengine.v1.ImportDocumentsRequest.ReconciliationMode|null} [reconciliationMode] ImportDocumentsRequest reconciliationMode
+                         * @property {google.protobuf.IFieldMask|null} [updateMask] ImportDocumentsRequest updateMask
+                         * @property {boolean|null} [autoGenerateIds] ImportDocumentsRequest autoGenerateIds
+                         * @property {string|null} [idField] ImportDocumentsRequest idField
                          */
     
                         /**
-                         * Constructs a new ImportUserEventsResponse.
+                         * Constructs a new ImportDocumentsRequest.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents an ImportUserEventsResponse.
-                         * @implements IImportUserEventsResponse
+                         * @classdesc Represents an ImportDocumentsRequest.
+                         * @implements IImportDocumentsRequest
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsResponse=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsRequest=} [properties] Properties to set
                          */
-                        function ImportUserEventsResponse(properties) {
-                            this.errorSamples = [];
+                        function ImportDocumentsRequest(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -10907,120 +13873,285 @@
                         }
     
                         /**
-                         * ImportUserEventsResponse errorSamples.
-                         * @member {Array.<google.rpc.IStatus>} errorSamples
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
+                         * ImportDocumentsRequest inlineSource.
+                         * @member {google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource|null|undefined} inlineSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
                          * @instance
                          */
-                        ImportUserEventsResponse.prototype.errorSamples = $util.emptyArray;
+                        ImportDocumentsRequest.prototype.inlineSource = null;
     
                         /**
-                         * ImportUserEventsResponse errorConfig.
+                         * ImportDocumentsRequest gcsSource.
+                         * @member {google.cloud.discoveryengine.v1.IGcsSource|null|undefined} gcsSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @instance
+                         */
+                        ImportDocumentsRequest.prototype.gcsSource = null;
+    
+                        /**
+                         * ImportDocumentsRequest bigquerySource.
+                         * @member {google.cloud.discoveryengine.v1.IBigQuerySource|null|undefined} bigquerySource
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @instance
+                         */
+                        ImportDocumentsRequest.prototype.bigquerySource = null;
+    
+                        /**
+                         * ImportDocumentsRequest fhirStoreSource.
+                         * @member {google.cloud.discoveryengine.v1.IFhirStoreSource|null|undefined} fhirStoreSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @instance
+                         */
+                        ImportDocumentsRequest.prototype.fhirStoreSource = null;
+    
+                        /**
+                         * ImportDocumentsRequest spannerSource.
+                         * @member {google.cloud.discoveryengine.v1.ISpannerSource|null|undefined} spannerSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @instance
+                         */
+                        ImportDocumentsRequest.prototype.spannerSource = null;
+    
+                        /**
+                         * ImportDocumentsRequest cloudSqlSource.
+                         * @member {google.cloud.discoveryengine.v1.ICloudSqlSource|null|undefined} cloudSqlSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @instance
+                         */
+                        ImportDocumentsRequest.prototype.cloudSqlSource = null;
+    
+                        /**
+                         * ImportDocumentsRequest firestoreSource.
+                         * @member {google.cloud.discoveryengine.v1.IFirestoreSource|null|undefined} firestoreSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @instance
+                         */
+                        ImportDocumentsRequest.prototype.firestoreSource = null;
+    
+                        /**
+                         * ImportDocumentsRequest alloyDbSource.
+                         * @member {google.cloud.discoveryengine.v1.IAlloyDbSource|null|undefined} alloyDbSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @instance
+                         */
+                        ImportDocumentsRequest.prototype.alloyDbSource = null;
+    
+                        /**
+                         * ImportDocumentsRequest bigtableSource.
+                         * @member {google.cloud.discoveryengine.v1.IBigtableSource|null|undefined} bigtableSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @instance
+                         */
+                        ImportDocumentsRequest.prototype.bigtableSource = null;
+    
+                        /**
+                         * ImportDocumentsRequest parent.
+                         * @member {string} parent
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @instance
+                         */
+                        ImportDocumentsRequest.prototype.parent = "";
+    
+                        /**
+                         * ImportDocumentsRequest errorConfig.
                          * @member {google.cloud.discoveryengine.v1.IImportErrorConfig|null|undefined} errorConfig
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
                          * @instance
                          */
-                        ImportUserEventsResponse.prototype.errorConfig = null;
+                        ImportDocumentsRequest.prototype.errorConfig = null;
     
                         /**
-                         * ImportUserEventsResponse joinedEventsCount.
-                         * @member {number|Long} joinedEventsCount
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
+                         * ImportDocumentsRequest reconciliationMode.
+                         * @member {google.cloud.discoveryengine.v1.ImportDocumentsRequest.ReconciliationMode} reconciliationMode
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
                          * @instance
                          */
-                        ImportUserEventsResponse.prototype.joinedEventsCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
+                        ImportDocumentsRequest.prototype.reconciliationMode = 0;
     
                         /**
-                         * ImportUserEventsResponse unjoinedEventsCount.
-                         * @member {number|Long} unjoinedEventsCount
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
+                         * ImportDocumentsRequest updateMask.
+                         * @member {google.protobuf.IFieldMask|null|undefined} updateMask
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
                          * @instance
                          */
-                        ImportUserEventsResponse.prototype.unjoinedEventsCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
+                        ImportDocumentsRequest.prototype.updateMask = null;
     
                         /**
-                         * Creates a new ImportUserEventsResponse instance using the specified properties.
+                         * ImportDocumentsRequest autoGenerateIds.
+                         * @member {boolean} autoGenerateIds
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @instance
+                         */
+                        ImportDocumentsRequest.prototype.autoGenerateIds = false;
+    
+                        /**
+                         * ImportDocumentsRequest idField.
+                         * @member {string} idField
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @instance
+                         */
+                        ImportDocumentsRequest.prototype.idField = "";
+    
+                        // OneOf field names bound to virtual getters and setters
+                        var $oneOfFields;
+    
+                        /**
+                         * ImportDocumentsRequest source.
+                         * @member {"inlineSource"|"gcsSource"|"bigquerySource"|"fhirStoreSource"|"spannerSource"|"cloudSqlSource"|"firestoreSource"|"alloyDbSource"|"bigtableSource"|undefined} source
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @instance
+                         */
+                        Object.defineProperty(ImportDocumentsRequest.prototype, "source", {
+                            get: $util.oneOfGetter($oneOfFields = ["inlineSource", "gcsSource", "bigquerySource", "fhirStoreSource", "spannerSource", "cloudSqlSource", "firestoreSource", "alloyDbSource", "bigtableSource"]),
+                            set: $util.oneOfSetter($oneOfFields)
+                        });
+    
+                        /**
+                         * Creates a new ImportDocumentsRequest instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsResponse=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsResponse} ImportUserEventsResponse instance
+                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsRequest=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsRequest} ImportDocumentsRequest instance
                          */
-                        ImportUserEventsResponse.create = function create(properties) {
-                            return new ImportUserEventsResponse(properties);
+                        ImportDocumentsRequest.create = function create(properties) {
+                            return new ImportDocumentsRequest(properties);
                         };
     
                         /**
-                         * Encodes the specified ImportUserEventsResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsResponse.verify|verify} messages.
+                         * Encodes the specified ImportDocumentsRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsRequest.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsResponse} message ImportUserEventsResponse message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsRequest} message ImportDocumentsRequest message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        ImportUserEventsResponse.encode = function encode(message, writer) {
+                        ImportDocumentsRequest.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.errorSamples != null && message.errorSamples.length)
-                                for (var i = 0; i < message.errorSamples.length; ++i)
-                                    $root.google.rpc.Status.encode(message.errorSamples[i], writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                            if (message.parent != null && Object.hasOwnProperty.call(message, "parent"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.parent);
+                            if (message.inlineSource != null && Object.hasOwnProperty.call(message, "inlineSource"))
+                                $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource.encode(message.inlineSource, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                            if (message.gcsSource != null && Object.hasOwnProperty.call(message, "gcsSource"))
+                                $root.google.cloud.discoveryengine.v1.GcsSource.encode(message.gcsSource, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
+                            if (message.bigquerySource != null && Object.hasOwnProperty.call(message, "bigquerySource"))
+                                $root.google.cloud.discoveryengine.v1.BigQuerySource.encode(message.bigquerySource, writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
                             if (message.errorConfig != null && Object.hasOwnProperty.call(message, "errorConfig"))
-                                $root.google.cloud.discoveryengine.v1.ImportErrorConfig.encode(message.errorConfig, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
-                            if (message.joinedEventsCount != null && Object.hasOwnProperty.call(message, "joinedEventsCount"))
-                                writer.uint32(/* id 3, wireType 0 =*/24).int64(message.joinedEventsCount);
-                            if (message.unjoinedEventsCount != null && Object.hasOwnProperty.call(message, "unjoinedEventsCount"))
-                                writer.uint32(/* id 4, wireType 0 =*/32).int64(message.unjoinedEventsCount);
+                                $root.google.cloud.discoveryengine.v1.ImportErrorConfig.encode(message.errorConfig, writer.uint32(/* id 5, wireType 2 =*/42).fork()).ldelim();
+                            if (message.reconciliationMode != null && Object.hasOwnProperty.call(message, "reconciliationMode"))
+                                writer.uint32(/* id 6, wireType 0 =*/48).int32(message.reconciliationMode);
+                            if (message.updateMask != null && Object.hasOwnProperty.call(message, "updateMask"))
+                                $root.google.protobuf.FieldMask.encode(message.updateMask, writer.uint32(/* id 7, wireType 2 =*/58).fork()).ldelim();
+                            if (message.autoGenerateIds != null && Object.hasOwnProperty.call(message, "autoGenerateIds"))
+                                writer.uint32(/* id 8, wireType 0 =*/64).bool(message.autoGenerateIds);
+                            if (message.idField != null && Object.hasOwnProperty.call(message, "idField"))
+                                writer.uint32(/* id 9, wireType 2 =*/74).string(message.idField);
+                            if (message.fhirStoreSource != null && Object.hasOwnProperty.call(message, "fhirStoreSource"))
+                                $root.google.cloud.discoveryengine.v1.FhirStoreSource.encode(message.fhirStoreSource, writer.uint32(/* id 10, wireType 2 =*/82).fork()).ldelim();
+                            if (message.spannerSource != null && Object.hasOwnProperty.call(message, "spannerSource"))
+                                $root.google.cloud.discoveryengine.v1.SpannerSource.encode(message.spannerSource, writer.uint32(/* id 11, wireType 2 =*/90).fork()).ldelim();
+                            if (message.cloudSqlSource != null && Object.hasOwnProperty.call(message, "cloudSqlSource"))
+                                $root.google.cloud.discoveryengine.v1.CloudSqlSource.encode(message.cloudSqlSource, writer.uint32(/* id 12, wireType 2 =*/98).fork()).ldelim();
+                            if (message.firestoreSource != null && Object.hasOwnProperty.call(message, "firestoreSource"))
+                                $root.google.cloud.discoveryengine.v1.FirestoreSource.encode(message.firestoreSource, writer.uint32(/* id 13, wireType 2 =*/106).fork()).ldelim();
+                            if (message.alloyDbSource != null && Object.hasOwnProperty.call(message, "alloyDbSource"))
+                                $root.google.cloud.discoveryengine.v1.AlloyDbSource.encode(message.alloyDbSource, writer.uint32(/* id 14, wireType 2 =*/114).fork()).ldelim();
+                            if (message.bigtableSource != null && Object.hasOwnProperty.call(message, "bigtableSource"))
+                                $root.google.cloud.discoveryengine.v1.BigtableSource.encode(message.bigtableSource, writer.uint32(/* id 15, wireType 2 =*/122).fork()).ldelim();
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified ImportUserEventsResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsResponse.verify|verify} messages.
+                         * Encodes the specified ImportDocumentsRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsRequest.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsResponse} message ImportUserEventsResponse message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsRequest} message ImportDocumentsRequest message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        ImportUserEventsResponse.encodeDelimited = function encodeDelimited(message, writer) {
+                        ImportDocumentsRequest.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes an ImportUserEventsResponse message from the specified reader or buffer.
+                         * Decodes an ImportDocumentsRequest message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsResponse} ImportUserEventsResponse
+                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsRequest} ImportDocumentsRequest
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        ImportUserEventsResponse.decode = function decode(reader, length) {
+                        ImportDocumentsRequest.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportUserEventsResponse();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
+                                case 2: {
+                                        message.inlineSource = $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 3: {
+                                        message.gcsSource = $root.google.cloud.discoveryengine.v1.GcsSource.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 4: {
+                                        message.bigquerySource = $root.google.cloud.discoveryengine.v1.BigQuerySource.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 10: {
+                                        message.fhirStoreSource = $root.google.cloud.discoveryengine.v1.FhirStoreSource.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 11: {
+                                        message.spannerSource = $root.google.cloud.discoveryengine.v1.SpannerSource.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 12: {
+                                        message.cloudSqlSource = $root.google.cloud.discoveryengine.v1.CloudSqlSource.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 13: {
+                                        message.firestoreSource = $root.google.cloud.discoveryengine.v1.FirestoreSource.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 14: {
+                                        message.alloyDbSource = $root.google.cloud.discoveryengine.v1.AlloyDbSource.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 15: {
+                                        message.bigtableSource = $root.google.cloud.discoveryengine.v1.BigtableSource.decode(reader, reader.uint32());
+                                        break;
+                                    }
                                 case 1: {
-                                        if (!(message.errorSamples && message.errorSamples.length))
-                                            message.errorSamples = [];
-                                        message.errorSamples.push($root.google.rpc.Status.decode(reader, reader.uint32()));
+                                        message.parent = reader.string();
                                         break;
                                     }
-                                case 2: {
+                                case 5: {
                                         message.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.decode(reader, reader.uint32());
                                         break;
                                     }
-                                case 3: {
-                                        message.joinedEventsCount = reader.int64();
+                                case 6: {
+                                        message.reconciliationMode = reader.int32();
                                         break;
                                     }
-                                case 4: {
-                                        message.unjoinedEventsCount = reader.int64();
+                                case 7: {
+                                        message.updateMask = $root.google.protobuf.FieldMask.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 8: {
+                                        message.autoGenerateIds = reader.bool();
+                                        break;
+                                    }
+                                case 9: {
+                                        message.idField = reader.string();
                                         break;
                                     }
                                 default:
@@ -11032,513 +14163,618 @@
                         };
     
                         /**
-                         * Decodes an ImportUserEventsResponse message from the specified reader or buffer, length delimited.
+                         * Decodes an ImportDocumentsRequest message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsResponse} ImportUserEventsResponse
+                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsRequest} ImportDocumentsRequest
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        ImportUserEventsResponse.decodeDelimited = function decodeDelimited(reader) {
+                        ImportDocumentsRequest.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies an ImportUserEventsResponse message.
+                         * Verifies an ImportDocumentsRequest message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        ImportUserEventsResponse.verify = function verify(message) {
+                        ImportDocumentsRequest.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            if (message.errorSamples != null && message.hasOwnProperty("errorSamples")) {
-                                if (!Array.isArray(message.errorSamples))
-                                    return "errorSamples: array expected";
-                                for (var i = 0; i < message.errorSamples.length; ++i) {
-                                    var error = $root.google.rpc.Status.verify(message.errorSamples[i]);
+                            var properties = {};
+                            if (message.inlineSource != null && message.hasOwnProperty("inlineSource")) {
+                                properties.source = 1;
+                                {
+                                    var error = $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource.verify(message.inlineSource);
                                     if (error)
-                                        return "errorSamples." + error;
+                                        return "inlineSource." + error;
+                                }
+                            }
+                            if (message.gcsSource != null && message.hasOwnProperty("gcsSource")) {
+                                if (properties.source === 1)
+                                    return "source: multiple values";
+                                properties.source = 1;
+                                {
+                                    var error = $root.google.cloud.discoveryengine.v1.GcsSource.verify(message.gcsSource);
+                                    if (error)
+                                        return "gcsSource." + error;
+                                }
+                            }
+                            if (message.bigquerySource != null && message.hasOwnProperty("bigquerySource")) {
+                                if (properties.source === 1)
+                                    return "source: multiple values";
+                                properties.source = 1;
+                                {
+                                    var error = $root.google.cloud.discoveryengine.v1.BigQuerySource.verify(message.bigquerySource);
+                                    if (error)
+                                        return "bigquerySource." + error;
+                                }
+                            }
+                            if (message.fhirStoreSource != null && message.hasOwnProperty("fhirStoreSource")) {
+                                if (properties.source === 1)
+                                    return "source: multiple values";
+                                properties.source = 1;
+                                {
+                                    var error = $root.google.cloud.discoveryengine.v1.FhirStoreSource.verify(message.fhirStoreSource);
+                                    if (error)
+                                        return "fhirStoreSource." + error;
+                                }
+                            }
+                            if (message.spannerSource != null && message.hasOwnProperty("spannerSource")) {
+                                if (properties.source === 1)
+                                    return "source: multiple values";
+                                properties.source = 1;
+                                {
+                                    var error = $root.google.cloud.discoveryengine.v1.SpannerSource.verify(message.spannerSource);
+                                    if (error)
+                                        return "spannerSource." + error;
+                                }
+                            }
+                            if (message.cloudSqlSource != null && message.hasOwnProperty("cloudSqlSource")) {
+                                if (properties.source === 1)
+                                    return "source: multiple values";
+                                properties.source = 1;
+                                {
+                                    var error = $root.google.cloud.discoveryengine.v1.CloudSqlSource.verify(message.cloudSqlSource);
+                                    if (error)
+                                        return "cloudSqlSource." + error;
+                                }
+                            }
+                            if (message.firestoreSource != null && message.hasOwnProperty("firestoreSource")) {
+                                if (properties.source === 1)
+                                    return "source: multiple values";
+                                properties.source = 1;
+                                {
+                                    var error = $root.google.cloud.discoveryengine.v1.FirestoreSource.verify(message.firestoreSource);
+                                    if (error)
+                                        return "firestoreSource." + error;
+                                }
+                            }
+                            if (message.alloyDbSource != null && message.hasOwnProperty("alloyDbSource")) {
+                                if (properties.source === 1)
+                                    return "source: multiple values";
+                                properties.source = 1;
+                                {
+                                    var error = $root.google.cloud.discoveryengine.v1.AlloyDbSource.verify(message.alloyDbSource);
+                                    if (error)
+                                        return "alloyDbSource." + error;
+                                }
+                            }
+                            if (message.bigtableSource != null && message.hasOwnProperty("bigtableSource")) {
+                                if (properties.source === 1)
+                                    return "source: multiple values";
+                                properties.source = 1;
+                                {
+                                    var error = $root.google.cloud.discoveryengine.v1.BigtableSource.verify(message.bigtableSource);
+                                    if (error)
+                                        return "bigtableSource." + error;
                                 }
                             }
+                            if (message.parent != null && message.hasOwnProperty("parent"))
+                                if (!$util.isString(message.parent))
+                                    return "parent: string expected";
                             if (message.errorConfig != null && message.hasOwnProperty("errorConfig")) {
                                 var error = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.verify(message.errorConfig);
                                 if (error)
                                     return "errorConfig." + error;
                             }
-                            if (message.joinedEventsCount != null && message.hasOwnProperty("joinedEventsCount"))
-                                if (!$util.isInteger(message.joinedEventsCount) && !(message.joinedEventsCount && $util.isInteger(message.joinedEventsCount.low) && $util.isInteger(message.joinedEventsCount.high)))
-                                    return "joinedEventsCount: integer|Long expected";
-                            if (message.unjoinedEventsCount != null && message.hasOwnProperty("unjoinedEventsCount"))
-                                if (!$util.isInteger(message.unjoinedEventsCount) && !(message.unjoinedEventsCount && $util.isInteger(message.unjoinedEventsCount.low) && $util.isInteger(message.unjoinedEventsCount.high)))
-                                    return "unjoinedEventsCount: integer|Long expected";
+                            if (message.reconciliationMode != null && message.hasOwnProperty("reconciliationMode"))
+                                switch (message.reconciliationMode) {
+                                default:
+                                    return "reconciliationMode: enum value expected";
+                                case 0:
+                                case 1:
+                                case 2:
+                                    break;
+                                }
+                            if (message.updateMask != null && message.hasOwnProperty("updateMask")) {
+                                var error = $root.google.protobuf.FieldMask.verify(message.updateMask);
+                                if (error)
+                                    return "updateMask." + error;
+                            }
+                            if (message.autoGenerateIds != null && message.hasOwnProperty("autoGenerateIds"))
+                                if (typeof message.autoGenerateIds !== "boolean")
+                                    return "autoGenerateIds: boolean expected";
+                            if (message.idField != null && message.hasOwnProperty("idField"))
+                                if (!$util.isString(message.idField))
+                                    return "idField: string expected";
                             return null;
                         };
     
                         /**
-                         * Creates an ImportUserEventsResponse message from a plain object. Also converts values to their respective internal types.
+                         * Creates an ImportDocumentsRequest message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsResponse} ImportUserEventsResponse
+                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsRequest} ImportDocumentsRequest
                          */
-                        ImportUserEventsResponse.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.ImportUserEventsResponse)
+                        ImportDocumentsRequest.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.ImportUserEventsResponse();
-                            if (object.errorSamples) {
-                                if (!Array.isArray(object.errorSamples))
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportUserEventsResponse.errorSamples: array expected");
-                                message.errorSamples = [];
-                                for (var i = 0; i < object.errorSamples.length; ++i) {
-                                    if (typeof object.errorSamples[i] !== "object")
-                                        throw TypeError(".google.cloud.discoveryengine.v1.ImportUserEventsResponse.errorSamples: object expected");
-                                    message.errorSamples[i] = $root.google.rpc.Status.fromObject(object.errorSamples[i]);
-                                }
+                            var message = new $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest();
+                            if (object.inlineSource != null) {
+                                if (typeof object.inlineSource !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.inlineSource: object expected");
+                                message.inlineSource = $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource.fromObject(object.inlineSource);
+                            }
+                            if (object.gcsSource != null) {
+                                if (typeof object.gcsSource !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.gcsSource: object expected");
+                                message.gcsSource = $root.google.cloud.discoveryengine.v1.GcsSource.fromObject(object.gcsSource);
+                            }
+                            if (object.bigquerySource != null) {
+                                if (typeof object.bigquerySource !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.bigquerySource: object expected");
+                                message.bigquerySource = $root.google.cloud.discoveryengine.v1.BigQuerySource.fromObject(object.bigquerySource);
+                            }
+                            if (object.fhirStoreSource != null) {
+                                if (typeof object.fhirStoreSource !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.fhirStoreSource: object expected");
+                                message.fhirStoreSource = $root.google.cloud.discoveryengine.v1.FhirStoreSource.fromObject(object.fhirStoreSource);
+                            }
+                            if (object.spannerSource != null) {
+                                if (typeof object.spannerSource !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.spannerSource: object expected");
+                                message.spannerSource = $root.google.cloud.discoveryengine.v1.SpannerSource.fromObject(object.spannerSource);
+                            }
+                            if (object.cloudSqlSource != null) {
+                                if (typeof object.cloudSqlSource !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.cloudSqlSource: object expected");
+                                message.cloudSqlSource = $root.google.cloud.discoveryengine.v1.CloudSqlSource.fromObject(object.cloudSqlSource);
                             }
+                            if (object.firestoreSource != null) {
+                                if (typeof object.firestoreSource !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.firestoreSource: object expected");
+                                message.firestoreSource = $root.google.cloud.discoveryengine.v1.FirestoreSource.fromObject(object.firestoreSource);
+                            }
+                            if (object.alloyDbSource != null) {
+                                if (typeof object.alloyDbSource !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.alloyDbSource: object expected");
+                                message.alloyDbSource = $root.google.cloud.discoveryengine.v1.AlloyDbSource.fromObject(object.alloyDbSource);
+                            }
+                            if (object.bigtableSource != null) {
+                                if (typeof object.bigtableSource !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.bigtableSource: object expected");
+                                message.bigtableSource = $root.google.cloud.discoveryengine.v1.BigtableSource.fromObject(object.bigtableSource);
+                            }
+                            if (object.parent != null)
+                                message.parent = String(object.parent);
                             if (object.errorConfig != null) {
                                 if (typeof object.errorConfig !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportUserEventsResponse.errorConfig: object expected");
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.errorConfig: object expected");
                                 message.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.fromObject(object.errorConfig);
                             }
-                            if (object.joinedEventsCount != null)
-                                if ($util.Long)
-                                    (message.joinedEventsCount = $util.Long.fromValue(object.joinedEventsCount)).unsigned = false;
-                                else if (typeof object.joinedEventsCount === "string")
-                                    message.joinedEventsCount = parseInt(object.joinedEventsCount, 10);
-                                else if (typeof object.joinedEventsCount === "number")
-                                    message.joinedEventsCount = object.joinedEventsCount;
-                                else if (typeof object.joinedEventsCount === "object")
-                                    message.joinedEventsCount = new $util.LongBits(object.joinedEventsCount.low >>> 0, object.joinedEventsCount.high >>> 0).toNumber();
-                            if (object.unjoinedEventsCount != null)
-                                if ($util.Long)
-                                    (message.unjoinedEventsCount = $util.Long.fromValue(object.unjoinedEventsCount)).unsigned = false;
-                                else if (typeof object.unjoinedEventsCount === "string")
-                                    message.unjoinedEventsCount = parseInt(object.unjoinedEventsCount, 10);
-                                else if (typeof object.unjoinedEventsCount === "number")
-                                    message.unjoinedEventsCount = object.unjoinedEventsCount;
-                                else if (typeof object.unjoinedEventsCount === "object")
-                                    message.unjoinedEventsCount = new $util.LongBits(object.unjoinedEventsCount.low >>> 0, object.unjoinedEventsCount.high >>> 0).toNumber();
+                            switch (object.reconciliationMode) {
+                            default:
+                                if (typeof object.reconciliationMode === "number") {
+                                    message.reconciliationMode = object.reconciliationMode;
+                                    break;
+                                }
+                                break;
+                            case "RECONCILIATION_MODE_UNSPECIFIED":
+                            case 0:
+                                message.reconciliationMode = 0;
+                                break;
+                            case "INCREMENTAL":
+                            case 1:
+                                message.reconciliationMode = 1;
+                                break;
+                            case "FULL":
+                            case 2:
+                                message.reconciliationMode = 2;
+                                break;
+                            }
+                            if (object.updateMask != null) {
+                                if (typeof object.updateMask !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.updateMask: object expected");
+                                message.updateMask = $root.google.protobuf.FieldMask.fromObject(object.updateMask);
+                            }
+                            if (object.autoGenerateIds != null)
+                                message.autoGenerateIds = Boolean(object.autoGenerateIds);
+                            if (object.idField != null)
+                                message.idField = String(object.idField);
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from an ImportUserEventsResponse message. Also converts values to other types if specified.
+                         * Creates a plain object from an ImportDocumentsRequest message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ImportUserEventsResponse} message ImportUserEventsResponse
+                         * @param {google.cloud.discoveryengine.v1.ImportDocumentsRequest} message ImportDocumentsRequest
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        ImportUserEventsResponse.toObject = function toObject(message, options) {
+                        ImportDocumentsRequest.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
-                            if (options.arrays || options.defaults)
-                                object.errorSamples = [];
                             if (options.defaults) {
+                                object.parent = "";
                                 object.errorConfig = null;
-                                if ($util.Long) {
-                                    var long = new $util.Long(0, 0, false);
-                                    object.joinedEventsCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
-                                } else
-                                    object.joinedEventsCount = options.longs === String ? "0" : 0;
-                                if ($util.Long) {
-                                    var long = new $util.Long(0, 0, false);
-                                    object.unjoinedEventsCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
-                                } else
-                                    object.unjoinedEventsCount = options.longs === String ? "0" : 0;
+                                object.reconciliationMode = options.enums === String ? "RECONCILIATION_MODE_UNSPECIFIED" : 0;
+                                object.updateMask = null;
+                                object.autoGenerateIds = false;
+                                object.idField = "";
                             }
-                            if (message.errorSamples && message.errorSamples.length) {
-                                object.errorSamples = [];
-                                for (var j = 0; j < message.errorSamples.length; ++j)
-                                    object.errorSamples[j] = $root.google.rpc.Status.toObject(message.errorSamples[j], options);
+                            if (message.parent != null && message.hasOwnProperty("parent"))
+                                object.parent = message.parent;
+                            if (message.inlineSource != null && message.hasOwnProperty("inlineSource")) {
+                                object.inlineSource = $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource.toObject(message.inlineSource, options);
+                                if (options.oneofs)
+                                    object.source = "inlineSource";
+                            }
+                            if (message.gcsSource != null && message.hasOwnProperty("gcsSource")) {
+                                object.gcsSource = $root.google.cloud.discoveryengine.v1.GcsSource.toObject(message.gcsSource, options);
+                                if (options.oneofs)
+                                    object.source = "gcsSource";
+                            }
+                            if (message.bigquerySource != null && message.hasOwnProperty("bigquerySource")) {
+                                object.bigquerySource = $root.google.cloud.discoveryengine.v1.BigQuerySource.toObject(message.bigquerySource, options);
+                                if (options.oneofs)
+                                    object.source = "bigquerySource";
                             }
                             if (message.errorConfig != null && message.hasOwnProperty("errorConfig"))
                                 object.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.toObject(message.errorConfig, options);
-                            if (message.joinedEventsCount != null && message.hasOwnProperty("joinedEventsCount"))
-                                if (typeof message.joinedEventsCount === "number")
-                                    object.joinedEventsCount = options.longs === String ? String(message.joinedEventsCount) : message.joinedEventsCount;
-                                else
-                                    object.joinedEventsCount = options.longs === String ? $util.Long.prototype.toString.call(message.joinedEventsCount) : options.longs === Number ? new $util.LongBits(message.joinedEventsCount.low >>> 0, message.joinedEventsCount.high >>> 0).toNumber() : message.joinedEventsCount;
-                            if (message.unjoinedEventsCount != null && message.hasOwnProperty("unjoinedEventsCount"))
-                                if (typeof message.unjoinedEventsCount === "number")
-                                    object.unjoinedEventsCount = options.longs === String ? String(message.unjoinedEventsCount) : message.unjoinedEventsCount;
-                                else
-                                    object.unjoinedEventsCount = options.longs === String ? $util.Long.prototype.toString.call(message.unjoinedEventsCount) : options.longs === Number ? new $util.LongBits(message.unjoinedEventsCount.low >>> 0, message.unjoinedEventsCount.high >>> 0).toNumber() : message.unjoinedEventsCount;
+                            if (message.reconciliationMode != null && message.hasOwnProperty("reconciliationMode"))
+                                object.reconciliationMode = options.enums === String ? $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest.ReconciliationMode[message.reconciliationMode] === undefined ? message.reconciliationMode : $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest.ReconciliationMode[message.reconciliationMode] : message.reconciliationMode;
+                            if (message.updateMask != null && message.hasOwnProperty("updateMask"))
+                                object.updateMask = $root.google.protobuf.FieldMask.toObject(message.updateMask, options);
+                            if (message.autoGenerateIds != null && message.hasOwnProperty("autoGenerateIds"))
+                                object.autoGenerateIds = message.autoGenerateIds;
+                            if (message.idField != null && message.hasOwnProperty("idField"))
+                                object.idField = message.idField;
+                            if (message.fhirStoreSource != null && message.hasOwnProperty("fhirStoreSource")) {
+                                object.fhirStoreSource = $root.google.cloud.discoveryengine.v1.FhirStoreSource.toObject(message.fhirStoreSource, options);
+                                if (options.oneofs)
+                                    object.source = "fhirStoreSource";
+                            }
+                            if (message.spannerSource != null && message.hasOwnProperty("spannerSource")) {
+                                object.spannerSource = $root.google.cloud.discoveryengine.v1.SpannerSource.toObject(message.spannerSource, options);
+                                if (options.oneofs)
+                                    object.source = "spannerSource";
+                            }
+                            if (message.cloudSqlSource != null && message.hasOwnProperty("cloudSqlSource")) {
+                                object.cloudSqlSource = $root.google.cloud.discoveryengine.v1.CloudSqlSource.toObject(message.cloudSqlSource, options);
+                                if (options.oneofs)
+                                    object.source = "cloudSqlSource";
+                            }
+                            if (message.firestoreSource != null && message.hasOwnProperty("firestoreSource")) {
+                                object.firestoreSource = $root.google.cloud.discoveryengine.v1.FirestoreSource.toObject(message.firestoreSource, options);
+                                if (options.oneofs)
+                                    object.source = "firestoreSource";
+                            }
+                            if (message.alloyDbSource != null && message.hasOwnProperty("alloyDbSource")) {
+                                object.alloyDbSource = $root.google.cloud.discoveryengine.v1.AlloyDbSource.toObject(message.alloyDbSource, options);
+                                if (options.oneofs)
+                                    object.source = "alloyDbSource";
+                            }
+                            if (message.bigtableSource != null && message.hasOwnProperty("bigtableSource")) {
+                                object.bigtableSource = $root.google.cloud.discoveryengine.v1.BigtableSource.toObject(message.bigtableSource, options);
+                                if (options.oneofs)
+                                    object.source = "bigtableSource";
+                            }
                             return object;
                         };
     
                         /**
-                         * Converts this ImportUserEventsResponse to JSON.
+                         * Converts this ImportDocumentsRequest to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        ImportUserEventsResponse.prototype.toJSON = function toJSON() {
+                        ImportDocumentsRequest.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for ImportUserEventsResponse
+                         * Gets the default type url for ImportDocumentsRequest
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        ImportUserEventsResponse.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        ImportDocumentsRequest.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportUserEventsResponse";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportDocumentsRequest";
                         };
     
-                        return ImportUserEventsResponse;
-                    })();
-    
-                    v1.ImportUserEventsMetadata = (function() {
-    
-                        /**
-                         * Properties of an ImportUserEventsMetadata.
-                         * @memberof google.cloud.discoveryengine.v1
-                         * @interface IImportUserEventsMetadata
-                         * @property {google.protobuf.ITimestamp|null} [createTime] ImportUserEventsMetadata createTime
-                         * @property {google.protobuf.ITimestamp|null} [updateTime] ImportUserEventsMetadata updateTime
-                         * @property {number|Long|null} [successCount] ImportUserEventsMetadata successCount
-                         * @property {number|Long|null} [failureCount] ImportUserEventsMetadata failureCount
-                         */
-    
-                        /**
-                         * Constructs a new ImportUserEventsMetadata.
-                         * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents an ImportUserEventsMetadata.
-                         * @implements IImportUserEventsMetadata
-                         * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsMetadata=} [properties] Properties to set
-                         */
-                        function ImportUserEventsMetadata(properties) {
-                            if (properties)
-                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
-                                    if (properties[keys[i]] != null)
-                                        this[keys[i]] = properties[keys[i]];
-                        }
-    
-                        /**
-                         * ImportUserEventsMetadata createTime.
-                         * @member {google.protobuf.ITimestamp|null|undefined} createTime
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
-                         * @instance
-                         */
-                        ImportUserEventsMetadata.prototype.createTime = null;
+                        ImportDocumentsRequest.InlineSource = (function() {
     
-                        /**
-                         * ImportUserEventsMetadata updateTime.
-                         * @member {google.protobuf.ITimestamp|null|undefined} updateTime
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
-                         * @instance
-                         */
-                        ImportUserEventsMetadata.prototype.updateTime = null;
+                            /**
+                             * Properties of an InlineSource.
+                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                             * @interface IInlineSource
+                             * @property {Array.<google.cloud.discoveryengine.v1.IDocument>|null} [documents] InlineSource documents
+                             */
     
-                        /**
-                         * ImportUserEventsMetadata successCount.
-                         * @member {number|Long} successCount
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
-                         * @instance
-                         */
-                        ImportUserEventsMetadata.prototype.successCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
+                            /**
+                             * Constructs a new InlineSource.
+                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                             * @classdesc Represents an InlineSource.
+                             * @implements IInlineSource
+                             * @constructor
+                             * @param {google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource=} [properties] Properties to set
+                             */
+                            function InlineSource(properties) {
+                                this.documents = [];
+                                if (properties)
+                                    for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                        if (properties[keys[i]] != null)
+                                            this[keys[i]] = properties[keys[i]];
+                            }
     
-                        /**
-                         * ImportUserEventsMetadata failureCount.
-                         * @member {number|Long} failureCount
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
-                         * @instance
-                         */
-                        ImportUserEventsMetadata.prototype.failureCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
+                            /**
+                             * InlineSource documents.
+                             * @member {Array.<google.cloud.discoveryengine.v1.IDocument>} documents
+                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource
+                             * @instance
+                             */
+                            InlineSource.prototype.documents = $util.emptyArray;
     
-                        /**
-                         * Creates a new ImportUserEventsMetadata instance using the specified properties.
-                         * @function create
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
-                         * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsMetadata=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsMetadata} ImportUserEventsMetadata instance
-                         */
-                        ImportUserEventsMetadata.create = function create(properties) {
-                            return new ImportUserEventsMetadata(properties);
-                        };
+                            /**
+                             * Creates a new InlineSource instance using the specified properties.
+                             * @function create
+                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource=} [properties] Properties to set
+                             * @returns {google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource} InlineSource instance
+                             */
+                            InlineSource.create = function create(properties) {
+                                return new InlineSource(properties);
+                            };
     
-                        /**
-                         * Encodes the specified ImportUserEventsMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsMetadata.verify|verify} messages.
-                         * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
-                         * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsMetadata} message ImportUserEventsMetadata message or plain object to encode
-                         * @param {$protobuf.Writer} [writer] Writer to encode to
-                         * @returns {$protobuf.Writer} Writer
-                         */
-                        ImportUserEventsMetadata.encode = function encode(message, writer) {
-                            if (!writer)
-                                writer = $Writer.create();
-                            if (message.createTime != null && Object.hasOwnProperty.call(message, "createTime"))
-                                $root.google.protobuf.Timestamp.encode(message.createTime, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
-                            if (message.updateTime != null && Object.hasOwnProperty.call(message, "updateTime"))
-                                $root.google.protobuf.Timestamp.encode(message.updateTime, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
-                            if (message.successCount != null && Object.hasOwnProperty.call(message, "successCount"))
-                                writer.uint32(/* id 3, wireType 0 =*/24).int64(message.successCount);
-                            if (message.failureCount != null && Object.hasOwnProperty.call(message, "failureCount"))
-                                writer.uint32(/* id 4, wireType 0 =*/32).int64(message.failureCount);
-                            return writer;
-                        };
+                            /**
+                             * Encodes the specified InlineSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource.verify|verify} messages.
+                             * @function encode
+                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource} message InlineSource message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            InlineSource.encode = function encode(message, writer) {
+                                if (!writer)
+                                    writer = $Writer.create();
+                                if (message.documents != null && message.documents.length)
+                                    for (var i = 0; i < message.documents.length; ++i)
+                                        $root.google.cloud.discoveryengine.v1.Document.encode(message.documents[i], writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                                return writer;
+                            };
     
-                        /**
-                         * Encodes the specified ImportUserEventsMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportUserEventsMetadata.verify|verify} messages.
-                         * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
-                         * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportUserEventsMetadata} message ImportUserEventsMetadata message or plain object to encode
-                         * @param {$protobuf.Writer} [writer] Writer to encode to
-                         * @returns {$protobuf.Writer} Writer
-                         */
-                        ImportUserEventsMetadata.encodeDelimited = function encodeDelimited(message, writer) {
-                            return this.encode(message, writer).ldelim();
-                        };
+                            /**
+                             * Encodes the specified InlineSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource.verify|verify} messages.
+                             * @function encodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource} message InlineSource message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            InlineSource.encodeDelimited = function encodeDelimited(message, writer) {
+                                return this.encode(message, writer).ldelim();
+                            };
     
-                        /**
-                         * Decodes an ImportUserEventsMetadata message from the specified reader or buffer.
-                         * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
-                         * @static
-                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsMetadata} ImportUserEventsMetadata
-                         * @throws {Error} If the payload is not a reader or valid buffer
-                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                         */
-                        ImportUserEventsMetadata.decode = function decode(reader, length) {
-                            if (!(reader instanceof $Reader))
-                                reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportUserEventsMetadata();
-                            while (reader.pos < end) {
-                                var tag = reader.uint32();
-                                switch (tag >>> 3) {
-                                case 1: {
-                                        message.createTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                case 2: {
-                                        message.updateTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                case 3: {
-                                        message.successCount = reader.int64();
-                                        break;
-                                    }
-                                case 4: {
-                                        message.failureCount = reader.int64();
+                            /**
+                             * Decodes an InlineSource message from the specified reader or buffer.
+                             * @function decode
+                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @param {number} [length] Message length if known beforehand
+                             * @returns {google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource} InlineSource
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            InlineSource.decode = function decode(reader, length) {
+                                if (!(reader instanceof $Reader))
+                                    reader = $Reader.create(reader);
+                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource();
+                                while (reader.pos < end) {
+                                    var tag = reader.uint32();
+                                    switch (tag >>> 3) {
+                                    case 1: {
+                                            if (!(message.documents && message.documents.length))
+                                                message.documents = [];
+                                            message.documents.push($root.google.cloud.discoveryengine.v1.Document.decode(reader, reader.uint32()));
+                                            break;
+                                        }
+                                    default:
+                                        reader.skipType(tag & 7);
                                         break;
                                     }
-                                default:
-                                    reader.skipType(tag & 7);
-                                    break;
                                 }
-                            }
-                            return message;
-                        };
+                                return message;
+                            };
     
-                        /**
-                         * Decodes an ImportUserEventsMetadata message from the specified reader or buffer, length delimited.
-                         * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
-                         * @static
-                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsMetadata} ImportUserEventsMetadata
-                         * @throws {Error} If the payload is not a reader or valid buffer
-                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                         */
-                        ImportUserEventsMetadata.decodeDelimited = function decodeDelimited(reader) {
-                            if (!(reader instanceof $Reader))
-                                reader = new $Reader(reader);
-                            return this.decode(reader, reader.uint32());
-                        };
+                            /**
+                             * Decodes an InlineSource message from the specified reader or buffer, length delimited.
+                             * @function decodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @returns {google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource} InlineSource
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            InlineSource.decodeDelimited = function decodeDelimited(reader) {
+                                if (!(reader instanceof $Reader))
+                                    reader = new $Reader(reader);
+                                return this.decode(reader, reader.uint32());
+                            };
     
-                        /**
-                         * Verifies an ImportUserEventsMetadata message.
-                         * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
-                         * @static
-                         * @param {Object.<string,*>} message Plain object to verify
-                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
-                         */
-                        ImportUserEventsMetadata.verify = function verify(message) {
-                            if (typeof message !== "object" || message === null)
-                                return "object expected";
-                            if (message.createTime != null && message.hasOwnProperty("createTime")) {
-                                var error = $root.google.protobuf.Timestamp.verify(message.createTime);
-                                if (error)
-                                    return "createTime." + error;
-                            }
-                            if (message.updateTime != null && message.hasOwnProperty("updateTime")) {
-                                var error = $root.google.protobuf.Timestamp.verify(message.updateTime);
-                                if (error)
-                                    return "updateTime." + error;
-                            }
-                            if (message.successCount != null && message.hasOwnProperty("successCount"))
-                                if (!$util.isInteger(message.successCount) && !(message.successCount && $util.isInteger(message.successCount.low) && $util.isInteger(message.successCount.high)))
-                                    return "successCount: integer|Long expected";
-                            if (message.failureCount != null && message.hasOwnProperty("failureCount"))
-                                if (!$util.isInteger(message.failureCount) && !(message.failureCount && $util.isInteger(message.failureCount.low) && $util.isInteger(message.failureCount.high)))
-                                    return "failureCount: integer|Long expected";
-                            return null;
-                        };
+                            /**
+                             * Verifies an InlineSource message.
+                             * @function verify
+                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource
+                             * @static
+                             * @param {Object.<string,*>} message Plain object to verify
+                             * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                             */
+                            InlineSource.verify = function verify(message) {
+                                if (typeof message !== "object" || message === null)
+                                    return "object expected";
+                                if (message.documents != null && message.hasOwnProperty("documents")) {
+                                    if (!Array.isArray(message.documents))
+                                        return "documents: array expected";
+                                    for (var i = 0; i < message.documents.length; ++i) {
+                                        var error = $root.google.cloud.discoveryengine.v1.Document.verify(message.documents[i]);
+                                        if (error)
+                                            return "documents." + error;
+                                    }
+                                }
+                                return null;
+                            };
     
-                        /**
-                         * Creates an ImportUserEventsMetadata message from a plain object. Also converts values to their respective internal types.
-                         * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
-                         * @static
-                         * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.ImportUserEventsMetadata} ImportUserEventsMetadata
-                         */
-                        ImportUserEventsMetadata.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.ImportUserEventsMetadata)
+                            /**
+                             * Creates an InlineSource message from a plain object. Also converts values to their respective internal types.
+                             * @function fromObject
+                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource
+                             * @static
+                             * @param {Object.<string,*>} object Plain object
+                             * @returns {google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource} InlineSource
+                             */
+                            InlineSource.fromObject = function fromObject(object) {
+                                if (object instanceof $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource)
+                                    return object;
+                                var message = new $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource();
+                                if (object.documents) {
+                                    if (!Array.isArray(object.documents))
+                                        throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource.documents: array expected");
+                                    message.documents = [];
+                                    for (var i = 0; i < object.documents.length; ++i) {
+                                        if (typeof object.documents[i] !== "object")
+                                            throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource.documents: object expected");
+                                        message.documents[i] = $root.google.cloud.discoveryengine.v1.Document.fromObject(object.documents[i]);
+                                    }
+                                }
+                                return message;
+                            };
+    
+                            /**
+                             * Creates a plain object from an InlineSource message. Also converts values to other types if specified.
+                             * @function toObject
+                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource} message InlineSource
+                             * @param {$protobuf.IConversionOptions} [options] Conversion options
+                             * @returns {Object.<string,*>} Plain object
+                             */
+                            InlineSource.toObject = function toObject(message, options) {
+                                if (!options)
+                                    options = {};
+                                var object = {};
+                                if (options.arrays || options.defaults)
+                                    object.documents = [];
+                                if (message.documents && message.documents.length) {
+                                    object.documents = [];
+                                    for (var j = 0; j < message.documents.length; ++j)
+                                        object.documents[j] = $root.google.cloud.discoveryengine.v1.Document.toObject(message.documents[j], options);
+                                }
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.ImportUserEventsMetadata();
-                            if (object.createTime != null) {
-                                if (typeof object.createTime !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportUserEventsMetadata.createTime: object expected");
-                                message.createTime = $root.google.protobuf.Timestamp.fromObject(object.createTime);
-                            }
-                            if (object.updateTime != null) {
-                                if (typeof object.updateTime !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportUserEventsMetadata.updateTime: object expected");
-                                message.updateTime = $root.google.protobuf.Timestamp.fromObject(object.updateTime);
-                            }
-                            if (object.successCount != null)
-                                if ($util.Long)
-                                    (message.successCount = $util.Long.fromValue(object.successCount)).unsigned = false;
-                                else if (typeof object.successCount === "string")
-                                    message.successCount = parseInt(object.successCount, 10);
-                                else if (typeof object.successCount === "number")
-                                    message.successCount = object.successCount;
-                                else if (typeof object.successCount === "object")
-                                    message.successCount = new $util.LongBits(object.successCount.low >>> 0, object.successCount.high >>> 0).toNumber();
-                            if (object.failureCount != null)
-                                if ($util.Long)
-                                    (message.failureCount = $util.Long.fromValue(object.failureCount)).unsigned = false;
-                                else if (typeof object.failureCount === "string")
-                                    message.failureCount = parseInt(object.failureCount, 10);
-                                else if (typeof object.failureCount === "number")
-                                    message.failureCount = object.failureCount;
-                                else if (typeof object.failureCount === "object")
-                                    message.failureCount = new $util.LongBits(object.failureCount.low >>> 0, object.failureCount.high >>> 0).toNumber();
-                            return message;
-                        };
+                            };
     
-                        /**
-                         * Creates a plain object from an ImportUserEventsMetadata message. Also converts values to other types if specified.
-                         * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
-                         * @static
-                         * @param {google.cloud.discoveryengine.v1.ImportUserEventsMetadata} message ImportUserEventsMetadata
-                         * @param {$protobuf.IConversionOptions} [options] Conversion options
-                         * @returns {Object.<string,*>} Plain object
-                         */
-                        ImportUserEventsMetadata.toObject = function toObject(message, options) {
-                            if (!options)
-                                options = {};
-                            var object = {};
-                            if (options.defaults) {
-                                object.createTime = null;
-                                object.updateTime = null;
-                                if ($util.Long) {
-                                    var long = new $util.Long(0, 0, false);
-                                    object.successCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
-                                } else
-                                    object.successCount = options.longs === String ? "0" : 0;
-                                if ($util.Long) {
-                                    var long = new $util.Long(0, 0, false);
-                                    object.failureCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
-                                } else
-                                    object.failureCount = options.longs === String ? "0" : 0;
-                            }
-                            if (message.createTime != null && message.hasOwnProperty("createTime"))
-                                object.createTime = $root.google.protobuf.Timestamp.toObject(message.createTime, options);
-                            if (message.updateTime != null && message.hasOwnProperty("updateTime"))
-                                object.updateTime = $root.google.protobuf.Timestamp.toObject(message.updateTime, options);
-                            if (message.successCount != null && message.hasOwnProperty("successCount"))
-                                if (typeof message.successCount === "number")
-                                    object.successCount = options.longs === String ? String(message.successCount) : message.successCount;
-                                else
-                                    object.successCount = options.longs === String ? $util.Long.prototype.toString.call(message.successCount) : options.longs === Number ? new $util.LongBits(message.successCount.low >>> 0, message.successCount.high >>> 0).toNumber() : message.successCount;
-                            if (message.failureCount != null && message.hasOwnProperty("failureCount"))
-                                if (typeof message.failureCount === "number")
-                                    object.failureCount = options.longs === String ? String(message.failureCount) : message.failureCount;
-                                else
-                                    object.failureCount = options.longs === String ? $util.Long.prototype.toString.call(message.failureCount) : options.longs === Number ? new $util.LongBits(message.failureCount.low >>> 0, message.failureCount.high >>> 0).toNumber() : message.failureCount;
-                            return object;
-                        };
+                            /**
+                             * Converts this InlineSource to JSON.
+                             * @function toJSON
+                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource
+                             * @instance
+                             * @returns {Object.<string,*>} JSON object
+                             */
+                            InlineSource.prototype.toJSON = function toJSON() {
+                                return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                            };
     
-                        /**
-                         * Converts this ImportUserEventsMetadata to JSON.
-                         * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
-                         * @instance
-                         * @returns {Object.<string,*>} JSON object
-                         */
-                        ImportUserEventsMetadata.prototype.toJSON = function toJSON() {
-                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
-                        };
+                            /**
+                             * Gets the default type url for InlineSource
+                             * @function getTypeUrl
+                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource
+                             * @static
+                             * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                             * @returns {string} The default type url
+                             */
+                            InlineSource.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                                if (typeUrlPrefix === undefined) {
+                                    typeUrlPrefix = "type.googleapis.com";
+                                }
+                                return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource";
+                            };
+    
+                            return InlineSource;
+                        })();
     
                         /**
-                         * Gets the default type url for ImportUserEventsMetadata
-                         * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.ImportUserEventsMetadata
-                         * @static
-                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                         * @returns {string} The default type url
+                         * ReconciliationMode enum.
+                         * @name google.cloud.discoveryengine.v1.ImportDocumentsRequest.ReconciliationMode
+                         * @enum {number}
+                         * @property {number} RECONCILIATION_MODE_UNSPECIFIED=0 RECONCILIATION_MODE_UNSPECIFIED value
+                         * @property {number} INCREMENTAL=1 INCREMENTAL value
+                         * @property {number} FULL=2 FULL value
                          */
-                        ImportUserEventsMetadata.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
-                            if (typeUrlPrefix === undefined) {
-                                typeUrlPrefix = "type.googleapis.com";
-                            }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportUserEventsMetadata";
-                        };
+                        ImportDocumentsRequest.ReconciliationMode = (function() {
+                            var valuesById = {}, values = Object.create(valuesById);
+                            values[valuesById[0] = "RECONCILIATION_MODE_UNSPECIFIED"] = 0;
+                            values[valuesById[1] = "INCREMENTAL"] = 1;
+                            values[valuesById[2] = "FULL"] = 2;
+                            return values;
+                        })();
     
-                        return ImportUserEventsMetadata;
+                        return ImportDocumentsRequest;
                     })();
     
-                    v1.ImportDocumentsMetadata = (function() {
+                    v1.ImportDocumentsResponse = (function() {
     
                         /**
-                         * Properties of an ImportDocumentsMetadata.
+                         * Properties of an ImportDocumentsResponse.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IImportDocumentsMetadata
-                         * @property {google.protobuf.ITimestamp|null} [createTime] ImportDocumentsMetadata createTime
-                         * @property {google.protobuf.ITimestamp|null} [updateTime] ImportDocumentsMetadata updateTime
-                         * @property {number|Long|null} [successCount] ImportDocumentsMetadata successCount
-                         * @property {number|Long|null} [failureCount] ImportDocumentsMetadata failureCount
-                         * @property {number|Long|null} [totalCount] ImportDocumentsMetadata totalCount
+                         * @interface IImportDocumentsResponse
+                         * @property {Array.<google.rpc.IStatus>|null} [errorSamples] ImportDocumentsResponse errorSamples
+                         * @property {google.cloud.discoveryengine.v1.IImportErrorConfig|null} [errorConfig] ImportDocumentsResponse errorConfig
                          */
     
                         /**
-                         * Constructs a new ImportDocumentsMetadata.
+                         * Constructs a new ImportDocumentsResponse.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents an ImportDocumentsMetadata.
-                         * @implements IImportDocumentsMetadata
+                         * @classdesc Represents an ImportDocumentsResponse.
+                         * @implements IImportDocumentsResponse
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsMetadata=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsResponse=} [properties] Properties to set
                          */
-                        function ImportDocumentsMetadata(properties) {
+                        function ImportDocumentsResponse(properties) {
+                            this.errorSamples = [];
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -11546,131 +14782,92 @@
                         }
     
                         /**
-                         * ImportDocumentsMetadata createTime.
-                         * @member {google.protobuf.ITimestamp|null|undefined} createTime
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
-                         * @instance
-                         */
-                        ImportDocumentsMetadata.prototype.createTime = null;
-    
-                        /**
-                         * ImportDocumentsMetadata updateTime.
-                         * @member {google.protobuf.ITimestamp|null|undefined} updateTime
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
-                         * @instance
-                         */
-                        ImportDocumentsMetadata.prototype.updateTime = null;
-    
-                        /**
-                         * ImportDocumentsMetadata successCount.
-                         * @member {number|Long} successCount
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
-                         * @instance
-                         */
-                        ImportDocumentsMetadata.prototype.successCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
-    
-                        /**
-                         * ImportDocumentsMetadata failureCount.
-                         * @member {number|Long} failureCount
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
+                         * ImportDocumentsResponse errorSamples.
+                         * @member {Array.<google.rpc.IStatus>} errorSamples
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
                          * @instance
                          */
-                        ImportDocumentsMetadata.prototype.failureCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
+                        ImportDocumentsResponse.prototype.errorSamples = $util.emptyArray;
     
                         /**
-                         * ImportDocumentsMetadata totalCount.
-                         * @member {number|Long} totalCount
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
+                         * ImportDocumentsResponse errorConfig.
+                         * @member {google.cloud.discoveryengine.v1.IImportErrorConfig|null|undefined} errorConfig
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
                          * @instance
                          */
-                        ImportDocumentsMetadata.prototype.totalCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
+                        ImportDocumentsResponse.prototype.errorConfig = null;
     
                         /**
-                         * Creates a new ImportDocumentsMetadata instance using the specified properties.
+                         * Creates a new ImportDocumentsResponse instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsMetadata=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsMetadata} ImportDocumentsMetadata instance
+                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsResponse=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsResponse} ImportDocumentsResponse instance
                          */
-                        ImportDocumentsMetadata.create = function create(properties) {
-                            return new ImportDocumentsMetadata(properties);
+                        ImportDocumentsResponse.create = function create(properties) {
+                            return new ImportDocumentsResponse(properties);
                         };
     
                         /**
-                         * Encodes the specified ImportDocumentsMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsMetadata.verify|verify} messages.
+                         * Encodes the specified ImportDocumentsResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsResponse.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsMetadata} message ImportDocumentsMetadata message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsResponse} message ImportDocumentsResponse message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        ImportDocumentsMetadata.encode = function encode(message, writer) {
+                        ImportDocumentsResponse.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.createTime != null && Object.hasOwnProperty.call(message, "createTime"))
-                                $root.google.protobuf.Timestamp.encode(message.createTime, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
-                            if (message.updateTime != null && Object.hasOwnProperty.call(message, "updateTime"))
-                                $root.google.protobuf.Timestamp.encode(message.updateTime, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
-                            if (message.successCount != null && Object.hasOwnProperty.call(message, "successCount"))
-                                writer.uint32(/* id 3, wireType 0 =*/24).int64(message.successCount);
-                            if (message.failureCount != null && Object.hasOwnProperty.call(message, "failureCount"))
-                                writer.uint32(/* id 4, wireType 0 =*/32).int64(message.failureCount);
-                            if (message.totalCount != null && Object.hasOwnProperty.call(message, "totalCount"))
-                                writer.uint32(/* id 5, wireType 0 =*/40).int64(message.totalCount);
+                            if (message.errorSamples != null && message.errorSamples.length)
+                                for (var i = 0; i < message.errorSamples.length; ++i)
+                                    $root.google.rpc.Status.encode(message.errorSamples[i], writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                            if (message.errorConfig != null && Object.hasOwnProperty.call(message, "errorConfig"))
+                                $root.google.cloud.discoveryengine.v1.ImportErrorConfig.encode(message.errorConfig, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified ImportDocumentsMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsMetadata.verify|verify} messages.
+                         * Encodes the specified ImportDocumentsResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsResponse.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsMetadata} message ImportDocumentsMetadata message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsResponse} message ImportDocumentsResponse message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        ImportDocumentsMetadata.encodeDelimited = function encodeDelimited(message, writer) {
+                        ImportDocumentsResponse.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes an ImportDocumentsMetadata message from the specified reader or buffer.
+                         * Decodes an ImportDocumentsResponse message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsMetadata} ImportDocumentsMetadata
+                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsResponse} ImportDocumentsResponse
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        ImportDocumentsMetadata.decode = function decode(reader, length) {
+                        ImportDocumentsResponse.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportDocumentsMetadata();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportDocumentsResponse();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 1: {
-                                        message.createTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
+                                        if (!(message.errorSamples && message.errorSamples.length))
+                                            message.errorSamples = [];
+                                        message.errorSamples.push($root.google.rpc.Status.decode(reader, reader.uint32()));
                                         break;
                                     }
                                 case 2: {
-                                        message.updateTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                case 3: {
-                                        message.successCount = reader.int64();
-                                        break;
-                                    }
-                                case 4: {
-                                        message.failureCount = reader.int64();
-                                        break;
-                                    }
-                                case 5: {
-                                        message.totalCount = reader.int64();
+                                        message.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.decode(reader, reader.uint32());
                                         break;
                                     }
                                 default:
@@ -11682,220 +14879,155 @@
                         };
     
                         /**
-                         * Decodes an ImportDocumentsMetadata message from the specified reader or buffer, length delimited.
+                         * Decodes an ImportDocumentsResponse message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsMetadata} ImportDocumentsMetadata
+                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsResponse} ImportDocumentsResponse
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        ImportDocumentsMetadata.decodeDelimited = function decodeDelimited(reader) {
+                        ImportDocumentsResponse.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies an ImportDocumentsMetadata message.
+                         * Verifies an ImportDocumentsResponse message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        ImportDocumentsMetadata.verify = function verify(message) {
+                        ImportDocumentsResponse.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            if (message.createTime != null && message.hasOwnProperty("createTime")) {
-                                var error = $root.google.protobuf.Timestamp.verify(message.createTime);
-                                if (error)
-                                    return "createTime." + error;
+                            if (message.errorSamples != null && message.hasOwnProperty("errorSamples")) {
+                                if (!Array.isArray(message.errorSamples))
+                                    return "errorSamples: array expected";
+                                for (var i = 0; i < message.errorSamples.length; ++i) {
+                                    var error = $root.google.rpc.Status.verify(message.errorSamples[i]);
+                                    if (error)
+                                        return "errorSamples." + error;
+                                }
                             }
-                            if (message.updateTime != null && message.hasOwnProperty("updateTime")) {
-                                var error = $root.google.protobuf.Timestamp.verify(message.updateTime);
+                            if (message.errorConfig != null && message.hasOwnProperty("errorConfig")) {
+                                var error = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.verify(message.errorConfig);
                                 if (error)
-                                    return "updateTime." + error;
+                                    return "errorConfig." + error;
                             }
-                            if (message.successCount != null && message.hasOwnProperty("successCount"))
-                                if (!$util.isInteger(message.successCount) && !(message.successCount && $util.isInteger(message.successCount.low) && $util.isInteger(message.successCount.high)))
-                                    return "successCount: integer|Long expected";
-                            if (message.failureCount != null && message.hasOwnProperty("failureCount"))
-                                if (!$util.isInteger(message.failureCount) && !(message.failureCount && $util.isInteger(message.failureCount.low) && $util.isInteger(message.failureCount.high)))
-                                    return "failureCount: integer|Long expected";
-                            if (message.totalCount != null && message.hasOwnProperty("totalCount"))
-                                if (!$util.isInteger(message.totalCount) && !(message.totalCount && $util.isInteger(message.totalCount.low) && $util.isInteger(message.totalCount.high)))
-                                    return "totalCount: integer|Long expected";
                             return null;
                         };
     
                         /**
-                         * Creates an ImportDocumentsMetadata message from a plain object. Also converts values to their respective internal types.
+                         * Creates an ImportDocumentsResponse message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsMetadata} ImportDocumentsMetadata
+                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsResponse} ImportDocumentsResponse
                          */
-                        ImportDocumentsMetadata.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.ImportDocumentsMetadata)
+                        ImportDocumentsResponse.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.ImportDocumentsResponse)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.ImportDocumentsMetadata();
-                            if (object.createTime != null) {
-                                if (typeof object.createTime !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsMetadata.createTime: object expected");
-                                message.createTime = $root.google.protobuf.Timestamp.fromObject(object.createTime);
+                            var message = new $root.google.cloud.discoveryengine.v1.ImportDocumentsResponse();
+                            if (object.errorSamples) {
+                                if (!Array.isArray(object.errorSamples))
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsResponse.errorSamples: array expected");
+                                message.errorSamples = [];
+                                for (var i = 0; i < object.errorSamples.length; ++i) {
+                                    if (typeof object.errorSamples[i] !== "object")
+                                        throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsResponse.errorSamples: object expected");
+                                    message.errorSamples[i] = $root.google.rpc.Status.fromObject(object.errorSamples[i]);
+                                }
                             }
-                            if (object.updateTime != null) {
-                                if (typeof object.updateTime !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsMetadata.updateTime: object expected");
-                                message.updateTime = $root.google.protobuf.Timestamp.fromObject(object.updateTime);
+                            if (object.errorConfig != null) {
+                                if (typeof object.errorConfig !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsResponse.errorConfig: object expected");
+                                message.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.fromObject(object.errorConfig);
                             }
-                            if (object.successCount != null)
-                                if ($util.Long)
-                                    (message.successCount = $util.Long.fromValue(object.successCount)).unsigned = false;
-                                else if (typeof object.successCount === "string")
-                                    message.successCount = parseInt(object.successCount, 10);
-                                else if (typeof object.successCount === "number")
-                                    message.successCount = object.successCount;
-                                else if (typeof object.successCount === "object")
-                                    message.successCount = new $util.LongBits(object.successCount.low >>> 0, object.successCount.high >>> 0).toNumber();
-                            if (object.failureCount != null)
-                                if ($util.Long)
-                                    (message.failureCount = $util.Long.fromValue(object.failureCount)).unsigned = false;
-                                else if (typeof object.failureCount === "string")
-                                    message.failureCount = parseInt(object.failureCount, 10);
-                                else if (typeof object.failureCount === "number")
-                                    message.failureCount = object.failureCount;
-                                else if (typeof object.failureCount === "object")
-                                    message.failureCount = new $util.LongBits(object.failureCount.low >>> 0, object.failureCount.high >>> 0).toNumber();
-                            if (object.totalCount != null)
-                                if ($util.Long)
-                                    (message.totalCount = $util.Long.fromValue(object.totalCount)).unsigned = false;
-                                else if (typeof object.totalCount === "string")
-                                    message.totalCount = parseInt(object.totalCount, 10);
-                                else if (typeof object.totalCount === "number")
-                                    message.totalCount = object.totalCount;
-                                else if (typeof object.totalCount === "object")
-                                    message.totalCount = new $util.LongBits(object.totalCount.low >>> 0, object.totalCount.high >>> 0).toNumber();
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from an ImportDocumentsMetadata message. Also converts values to other types if specified.
+                         * Creates a plain object from an ImportDocumentsResponse message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ImportDocumentsMetadata} message ImportDocumentsMetadata
+                         * @param {google.cloud.discoveryengine.v1.ImportDocumentsResponse} message ImportDocumentsResponse
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        ImportDocumentsMetadata.toObject = function toObject(message, options) {
+                        ImportDocumentsResponse.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
-                            if (options.defaults) {
-                                object.createTime = null;
-                                object.updateTime = null;
-                                if ($util.Long) {
-                                    var long = new $util.Long(0, 0, false);
-                                    object.successCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
-                                } else
-                                    object.successCount = options.longs === String ? "0" : 0;
-                                if ($util.Long) {
-                                    var long = new $util.Long(0, 0, false);
-                                    object.failureCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
-                                } else
-                                    object.failureCount = options.longs === String ? "0" : 0;
-                                if ($util.Long) {
-                                    var long = new $util.Long(0, 0, false);
-                                    object.totalCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
-                                } else
-                                    object.totalCount = options.longs === String ? "0" : 0;
+                            if (options.arrays || options.defaults)
+                                object.errorSamples = [];
+                            if (options.defaults)
+                                object.errorConfig = null;
+                            if (message.errorSamples && message.errorSamples.length) {
+                                object.errorSamples = [];
+                                for (var j = 0; j < message.errorSamples.length; ++j)
+                                    object.errorSamples[j] = $root.google.rpc.Status.toObject(message.errorSamples[j], options);
                             }
-                            if (message.createTime != null && message.hasOwnProperty("createTime"))
-                                object.createTime = $root.google.protobuf.Timestamp.toObject(message.createTime, options);
-                            if (message.updateTime != null && message.hasOwnProperty("updateTime"))
-                                object.updateTime = $root.google.protobuf.Timestamp.toObject(message.updateTime, options);
-                            if (message.successCount != null && message.hasOwnProperty("successCount"))
-                                if (typeof message.successCount === "number")
-                                    object.successCount = options.longs === String ? String(message.successCount) : message.successCount;
-                                else
-                                    object.successCount = options.longs === String ? $util.Long.prototype.toString.call(message.successCount) : options.longs === Number ? new $util.LongBits(message.successCount.low >>> 0, message.successCount.high >>> 0).toNumber() : message.successCount;
-                            if (message.failureCount != null && message.hasOwnProperty("failureCount"))
-                                if (typeof message.failureCount === "number")
-                                    object.failureCount = options.longs === String ? String(message.failureCount) : message.failureCount;
-                                else
-                                    object.failureCount = options.longs === String ? $util.Long.prototype.toString.call(message.failureCount) : options.longs === Number ? new $util.LongBits(message.failureCount.low >>> 0, message.failureCount.high >>> 0).toNumber() : message.failureCount;
-                            if (message.totalCount != null && message.hasOwnProperty("totalCount"))
-                                if (typeof message.totalCount === "number")
-                                    object.totalCount = options.longs === String ? String(message.totalCount) : message.totalCount;
-                                else
-                                    object.totalCount = options.longs === String ? $util.Long.prototype.toString.call(message.totalCount) : options.longs === Number ? new $util.LongBits(message.totalCount.low >>> 0, message.totalCount.high >>> 0).toNumber() : message.totalCount;
+                            if (message.errorConfig != null && message.hasOwnProperty("errorConfig"))
+                                object.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.toObject(message.errorConfig, options);
                             return object;
                         };
     
                         /**
-                         * Converts this ImportDocumentsMetadata to JSON.
+                         * Converts this ImportDocumentsResponse to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        ImportDocumentsMetadata.prototype.toJSON = function toJSON() {
+                        ImportDocumentsResponse.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for ImportDocumentsMetadata
+                         * Gets the default type url for ImportDocumentsResponse
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsMetadata
+                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        ImportDocumentsMetadata.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        ImportDocumentsResponse.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportDocumentsMetadata";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportDocumentsResponse";
                         };
     
-                        return ImportDocumentsMetadata;
+                        return ImportDocumentsResponse;
                     })();
     
-                    v1.ImportDocumentsRequest = (function() {
+                    v1.ImportSuggestionDenyListEntriesRequest = (function() {
     
                         /**
-                         * Properties of an ImportDocumentsRequest.
+                         * Properties of an ImportSuggestionDenyListEntriesRequest.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IImportDocumentsRequest
-                         * @property {google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource|null} [inlineSource] ImportDocumentsRequest inlineSource
-                         * @property {google.cloud.discoveryengine.v1.IGcsSource|null} [gcsSource] ImportDocumentsRequest gcsSource
-                         * @property {google.cloud.discoveryengine.v1.IBigQuerySource|null} [bigquerySource] ImportDocumentsRequest bigquerySource
-                         * @property {google.cloud.discoveryengine.v1.IFhirStoreSource|null} [fhirStoreSource] ImportDocumentsRequest fhirStoreSource
-                         * @property {google.cloud.discoveryengine.v1.ISpannerSource|null} [spannerSource] ImportDocumentsRequest spannerSource
-                         * @property {google.cloud.discoveryengine.v1.ICloudSqlSource|null} [cloudSqlSource] ImportDocumentsRequest cloudSqlSource
-                         * @property {google.cloud.discoveryengine.v1.IFirestoreSource|null} [firestoreSource] ImportDocumentsRequest firestoreSource
-                         * @property {google.cloud.discoveryengine.v1.IBigtableSource|null} [bigtableSource] ImportDocumentsRequest bigtableSource
-                         * @property {string|null} [parent] ImportDocumentsRequest parent
-                         * @property {google.cloud.discoveryengine.v1.IImportErrorConfig|null} [errorConfig] ImportDocumentsRequest errorConfig
-                         * @property {google.cloud.discoveryengine.v1.ImportDocumentsRequest.ReconciliationMode|null} [reconciliationMode] ImportDocumentsRequest reconciliationMode
-                         * @property {google.protobuf.IFieldMask|null} [updateMask] ImportDocumentsRequest updateMask
-                         * @property {boolean|null} [autoGenerateIds] ImportDocumentsRequest autoGenerateIds
-                         * @property {string|null} [idField] ImportDocumentsRequest idField
+                         * @interface IImportSuggestionDenyListEntriesRequest
+                         * @property {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource|null} [inlineSource] ImportSuggestionDenyListEntriesRequest inlineSource
+                         * @property {google.cloud.discoveryengine.v1.IGcsSource|null} [gcsSource] ImportSuggestionDenyListEntriesRequest gcsSource
+                         * @property {string|null} [parent] ImportSuggestionDenyListEntriesRequest parent
                          */
     
                         /**
-                         * Constructs a new ImportDocumentsRequest.
+                         * Constructs a new ImportSuggestionDenyListEntriesRequest.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents an ImportDocumentsRequest.
-                         * @implements IImportDocumentsRequest
+                         * @classdesc Represents an ImportSuggestionDenyListEntriesRequest.
+                         * @implements IImportSuggestionDenyListEntriesRequest
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsRequest=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesRequest=} [properties] Properties to set
                          */
-                        function ImportDocumentsRequest(properties) {
+                        function ImportSuggestionDenyListEntriesRequest(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -11903,273 +15035,119 @@
                         }
     
                         /**
-                         * ImportDocumentsRequest inlineSource.
-                         * @member {google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource|null|undefined} inlineSource
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * ImportSuggestionDenyListEntriesRequest inlineSource.
+                         * @member {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource|null|undefined} inlineSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
                          * @instance
                          */
-                        ImportDocumentsRequest.prototype.inlineSource = null;
+                        ImportSuggestionDenyListEntriesRequest.prototype.inlineSource = null;
     
                         /**
-                         * ImportDocumentsRequest gcsSource.
+                         * ImportSuggestionDenyListEntriesRequest gcsSource.
                          * @member {google.cloud.discoveryengine.v1.IGcsSource|null|undefined} gcsSource
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
-                         * @instance
-                         */
-                        ImportDocumentsRequest.prototype.gcsSource = null;
-    
-                        /**
-                         * ImportDocumentsRequest bigquerySource.
-                         * @member {google.cloud.discoveryengine.v1.IBigQuerySource|null|undefined} bigquerySource
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
-                         * @instance
-                         */
-                        ImportDocumentsRequest.prototype.bigquerySource = null;
-    
-                        /**
-                         * ImportDocumentsRequest fhirStoreSource.
-                         * @member {google.cloud.discoveryengine.v1.IFhirStoreSource|null|undefined} fhirStoreSource
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
-                         * @instance
-                         */
-                        ImportDocumentsRequest.prototype.fhirStoreSource = null;
-    
-                        /**
-                         * ImportDocumentsRequest spannerSource.
-                         * @member {google.cloud.discoveryengine.v1.ISpannerSource|null|undefined} spannerSource
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
-                         * @instance
-                         */
-                        ImportDocumentsRequest.prototype.spannerSource = null;
-    
-                        /**
-                         * ImportDocumentsRequest cloudSqlSource.
-                         * @member {google.cloud.discoveryengine.v1.ICloudSqlSource|null|undefined} cloudSqlSource
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
-                         * @instance
-                         */
-                        ImportDocumentsRequest.prototype.cloudSqlSource = null;
-    
-                        /**
-                         * ImportDocumentsRequest firestoreSource.
-                         * @member {google.cloud.discoveryengine.v1.IFirestoreSource|null|undefined} firestoreSource
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
-                         * @instance
-                         */
-                        ImportDocumentsRequest.prototype.firestoreSource = null;
-    
-                        /**
-                         * ImportDocumentsRequest bigtableSource.
-                         * @member {google.cloud.discoveryengine.v1.IBigtableSource|null|undefined} bigtableSource
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
                          * @instance
                          */
-                        ImportDocumentsRequest.prototype.bigtableSource = null;
+                        ImportSuggestionDenyListEntriesRequest.prototype.gcsSource = null;
     
                         /**
-                         * ImportDocumentsRequest parent.
+                         * ImportSuggestionDenyListEntriesRequest parent.
                          * @member {string} parent
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
-                         * @instance
-                         */
-                        ImportDocumentsRequest.prototype.parent = "";
-    
-                        /**
-                         * ImportDocumentsRequest errorConfig.
-                         * @member {google.cloud.discoveryengine.v1.IImportErrorConfig|null|undefined} errorConfig
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
-                         * @instance
-                         */
-                        ImportDocumentsRequest.prototype.errorConfig = null;
-    
-                        /**
-                         * ImportDocumentsRequest reconciliationMode.
-                         * @member {google.cloud.discoveryengine.v1.ImportDocumentsRequest.ReconciliationMode} reconciliationMode
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
-                         * @instance
-                         */
-                        ImportDocumentsRequest.prototype.reconciliationMode = 0;
-    
-                        /**
-                         * ImportDocumentsRequest updateMask.
-                         * @member {google.protobuf.IFieldMask|null|undefined} updateMask
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
-                         * @instance
-                         */
-                        ImportDocumentsRequest.prototype.updateMask = null;
-    
-                        /**
-                         * ImportDocumentsRequest autoGenerateIds.
-                         * @member {boolean} autoGenerateIds
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
-                         * @instance
-                         */
-                        ImportDocumentsRequest.prototype.autoGenerateIds = false;
-    
-                        /**
-                         * ImportDocumentsRequest idField.
-                         * @member {string} idField
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
                          * @instance
                          */
-                        ImportDocumentsRequest.prototype.idField = "";
+                        ImportSuggestionDenyListEntriesRequest.prototype.parent = "";
     
                         // OneOf field names bound to virtual getters and setters
                         var $oneOfFields;
     
                         /**
-                         * ImportDocumentsRequest source.
-                         * @member {"inlineSource"|"gcsSource"|"bigquerySource"|"fhirStoreSource"|"spannerSource"|"cloudSqlSource"|"firestoreSource"|"bigtableSource"|undefined} source
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * ImportSuggestionDenyListEntriesRequest source.
+                         * @member {"inlineSource"|"gcsSource"|undefined} source
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
                          * @instance
                          */
-                        Object.defineProperty(ImportDocumentsRequest.prototype, "source", {
-                            get: $util.oneOfGetter($oneOfFields = ["inlineSource", "gcsSource", "bigquerySource", "fhirStoreSource", "spannerSource", "cloudSqlSource", "firestoreSource", "bigtableSource"]),
+                        Object.defineProperty(ImportSuggestionDenyListEntriesRequest.prototype, "source", {
+                            get: $util.oneOfGetter($oneOfFields = ["inlineSource", "gcsSource"]),
                             set: $util.oneOfSetter($oneOfFields)
                         });
     
                         /**
-                         * Creates a new ImportDocumentsRequest instance using the specified properties.
+                         * Creates a new ImportSuggestionDenyListEntriesRequest instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsRequest=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsRequest} ImportDocumentsRequest instance
+                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesRequest=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest} ImportSuggestionDenyListEntriesRequest instance
                          */
-                        ImportDocumentsRequest.create = function create(properties) {
-                            return new ImportDocumentsRequest(properties);
+                        ImportSuggestionDenyListEntriesRequest.create = function create(properties) {
+                            return new ImportSuggestionDenyListEntriesRequest(properties);
                         };
     
                         /**
-                         * Encodes the specified ImportDocumentsRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsRequest.verify|verify} messages.
+                         * Encodes the specified ImportSuggestionDenyListEntriesRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsRequest} message ImportDocumentsRequest message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesRequest} message ImportSuggestionDenyListEntriesRequest message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        ImportDocumentsRequest.encode = function encode(message, writer) {
+                        ImportSuggestionDenyListEntriesRequest.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
                             if (message.parent != null && Object.hasOwnProperty.call(message, "parent"))
                                 writer.uint32(/* id 1, wireType 2 =*/10).string(message.parent);
                             if (message.inlineSource != null && Object.hasOwnProperty.call(message, "inlineSource"))
-                                $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource.encode(message.inlineSource, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                                $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource.encode(message.inlineSource, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
                             if (message.gcsSource != null && Object.hasOwnProperty.call(message, "gcsSource"))
                                 $root.google.cloud.discoveryengine.v1.GcsSource.encode(message.gcsSource, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
-                            if (message.bigquerySource != null && Object.hasOwnProperty.call(message, "bigquerySource"))
-                                $root.google.cloud.discoveryengine.v1.BigQuerySource.encode(message.bigquerySource, writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
-                            if (message.errorConfig != null && Object.hasOwnProperty.call(message, "errorConfig"))
-                                $root.google.cloud.discoveryengine.v1.ImportErrorConfig.encode(message.errorConfig, writer.uint32(/* id 5, wireType 2 =*/42).fork()).ldelim();
-                            if (message.reconciliationMode != null && Object.hasOwnProperty.call(message, "reconciliationMode"))
-                                writer.uint32(/* id 6, wireType 0 =*/48).int32(message.reconciliationMode);
-                            if (message.updateMask != null && Object.hasOwnProperty.call(message, "updateMask"))
-                                $root.google.protobuf.FieldMask.encode(message.updateMask, writer.uint32(/* id 7, wireType 2 =*/58).fork()).ldelim();
-                            if (message.autoGenerateIds != null && Object.hasOwnProperty.call(message, "autoGenerateIds"))
-                                writer.uint32(/* id 8, wireType 0 =*/64).bool(message.autoGenerateIds);
-                            if (message.idField != null && Object.hasOwnProperty.call(message, "idField"))
-                                writer.uint32(/* id 9, wireType 2 =*/74).string(message.idField);
-                            if (message.fhirStoreSource != null && Object.hasOwnProperty.call(message, "fhirStoreSource"))
-                                $root.google.cloud.discoveryengine.v1.FhirStoreSource.encode(message.fhirStoreSource, writer.uint32(/* id 10, wireType 2 =*/82).fork()).ldelim();
-                            if (message.spannerSource != null && Object.hasOwnProperty.call(message, "spannerSource"))
-                                $root.google.cloud.discoveryengine.v1.SpannerSource.encode(message.spannerSource, writer.uint32(/* id 11, wireType 2 =*/90).fork()).ldelim();
-                            if (message.cloudSqlSource != null && Object.hasOwnProperty.call(message, "cloudSqlSource"))
-                                $root.google.cloud.discoveryengine.v1.CloudSqlSource.encode(message.cloudSqlSource, writer.uint32(/* id 12, wireType 2 =*/98).fork()).ldelim();
-                            if (message.firestoreSource != null && Object.hasOwnProperty.call(message, "firestoreSource"))
-                                $root.google.cloud.discoveryengine.v1.FirestoreSource.encode(message.firestoreSource, writer.uint32(/* id 13, wireType 2 =*/106).fork()).ldelim();
-                            if (message.bigtableSource != null && Object.hasOwnProperty.call(message, "bigtableSource"))
-                                $root.google.cloud.discoveryengine.v1.BigtableSource.encode(message.bigtableSource, writer.uint32(/* id 15, wireType 2 =*/122).fork()).ldelim();
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified ImportDocumentsRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsRequest.verify|verify} messages.
+                         * Encodes the specified ImportSuggestionDenyListEntriesRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsRequest} message ImportDocumentsRequest message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesRequest} message ImportSuggestionDenyListEntriesRequest message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        ImportDocumentsRequest.encodeDelimited = function encodeDelimited(message, writer) {
+                        ImportSuggestionDenyListEntriesRequest.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes an ImportDocumentsRequest message from the specified reader or buffer.
+                         * Decodes an ImportSuggestionDenyListEntriesRequest message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsRequest} ImportDocumentsRequest
+                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest} ImportSuggestionDenyListEntriesRequest
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        ImportDocumentsRequest.decode = function decode(reader, length) {
+                        ImportSuggestionDenyListEntriesRequest.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 2: {
-                                        message.inlineSource = $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource.decode(reader, reader.uint32());
+                                        message.inlineSource = $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource.decode(reader, reader.uint32());
                                         break;
                                     }
                                 case 3: {
                                         message.gcsSource = $root.google.cloud.discoveryengine.v1.GcsSource.decode(reader, reader.uint32());
                                         break;
                                     }
-                                case 4: {
-                                        message.bigquerySource = $root.google.cloud.discoveryengine.v1.BigQuerySource.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                case 10: {
-                                        message.fhirStoreSource = $root.google.cloud.discoveryengine.v1.FhirStoreSource.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                case 11: {
-                                        message.spannerSource = $root.google.cloud.discoveryengine.v1.SpannerSource.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                case 12: {
-                                        message.cloudSqlSource = $root.google.cloud.discoveryengine.v1.CloudSqlSource.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                case 13: {
-                                        message.firestoreSource = $root.google.cloud.discoveryengine.v1.FirestoreSource.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                case 15: {
-                                        message.bigtableSource = $root.google.cloud.discoveryengine.v1.BigtableSource.decode(reader, reader.uint32());
-                                        break;
-                                    }
                                 case 1: {
                                         message.parent = reader.string();
                                         break;
                                     }
-                                case 5: {
-                                        message.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                case 6: {
-                                        message.reconciliationMode = reader.int32();
-                                        break;
-                                    }
-                                case 7: {
-                                        message.updateMask = $root.google.protobuf.FieldMask.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                case 8: {
-                                        message.autoGenerateIds = reader.bool();
-                                        break;
-                                    }
-                                case 9: {
-                                        message.idField = reader.string();
-                                        break;
-                                    }
                                 default:
                                     reader.skipType(tag & 7);
                                     break;
@@ -12179,37 +15157,37 @@
                         };
     
                         /**
-                         * Decodes an ImportDocumentsRequest message from the specified reader or buffer, length delimited.
+                         * Decodes an ImportSuggestionDenyListEntriesRequest message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsRequest} ImportDocumentsRequest
+                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest} ImportSuggestionDenyListEntriesRequest
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        ImportDocumentsRequest.decodeDelimited = function decodeDelimited(reader) {
+                        ImportSuggestionDenyListEntriesRequest.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies an ImportDocumentsRequest message.
+                         * Verifies an ImportSuggestionDenyListEntriesRequest message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        ImportDocumentsRequest.verify = function verify(message) {
+                        ImportSuggestionDenyListEntriesRequest.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
                             var properties = {};
                             if (message.inlineSource != null && message.hasOwnProperty("inlineSource")) {
                                 properties.source = 1;
                                 {
-                                    var error = $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource.verify(message.inlineSource);
+                                    var error = $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource.verify(message.inlineSource);
                                     if (error)
                                         return "inlineSource." + error;
                                 }
@@ -12224,309 +15202,114 @@
                                         return "gcsSource." + error;
                                 }
                             }
-                            if (message.bigquerySource != null && message.hasOwnProperty("bigquerySource")) {
-                                if (properties.source === 1)
-                                    return "source: multiple values";
-                                properties.source = 1;
-                                {
-                                    var error = $root.google.cloud.discoveryengine.v1.BigQuerySource.verify(message.bigquerySource);
-                                    if (error)
-                                        return "bigquerySource." + error;
-                                }
-                            }
-                            if (message.fhirStoreSource != null && message.hasOwnProperty("fhirStoreSource")) {
-                                if (properties.source === 1)
-                                    return "source: multiple values";
-                                properties.source = 1;
-                                {
-                                    var error = $root.google.cloud.discoveryengine.v1.FhirStoreSource.verify(message.fhirStoreSource);
-                                    if (error)
-                                        return "fhirStoreSource." + error;
-                                }
-                            }
-                            if (message.spannerSource != null && message.hasOwnProperty("spannerSource")) {
-                                if (properties.source === 1)
-                                    return "source: multiple values";
-                                properties.source = 1;
-                                {
-                                    var error = $root.google.cloud.discoveryengine.v1.SpannerSource.verify(message.spannerSource);
-                                    if (error)
-                                        return "spannerSource." + error;
-                                }
-                            }
-                            if (message.cloudSqlSource != null && message.hasOwnProperty("cloudSqlSource")) {
-                                if (properties.source === 1)
-                                    return "source: multiple values";
-                                properties.source = 1;
-                                {
-                                    var error = $root.google.cloud.discoveryengine.v1.CloudSqlSource.verify(message.cloudSqlSource);
-                                    if (error)
-                                        return "cloudSqlSource." + error;
-                                }
-                            }
-                            if (message.firestoreSource != null && message.hasOwnProperty("firestoreSource")) {
-                                if (properties.source === 1)
-                                    return "source: multiple values";
-                                properties.source = 1;
-                                {
-                                    var error = $root.google.cloud.discoveryengine.v1.FirestoreSource.verify(message.firestoreSource);
-                                    if (error)
-                                        return "firestoreSource." + error;
-                                }
-                            }
-                            if (message.bigtableSource != null && message.hasOwnProperty("bigtableSource")) {
-                                if (properties.source === 1)
-                                    return "source: multiple values";
-                                properties.source = 1;
-                                {
-                                    var error = $root.google.cloud.discoveryengine.v1.BigtableSource.verify(message.bigtableSource);
-                                    if (error)
-                                        return "bigtableSource." + error;
-                                }
-                            }
                             if (message.parent != null && message.hasOwnProperty("parent"))
                                 if (!$util.isString(message.parent))
                                     return "parent: string expected";
-                            if (message.errorConfig != null && message.hasOwnProperty("errorConfig")) {
-                                var error = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.verify(message.errorConfig);
-                                if (error)
-                                    return "errorConfig." + error;
-                            }
-                            if (message.reconciliationMode != null && message.hasOwnProperty("reconciliationMode"))
-                                switch (message.reconciliationMode) {
-                                default:
-                                    return "reconciliationMode: enum value expected";
-                                case 0:
-                                case 1:
-                                case 2:
-                                    break;
-                                }
-                            if (message.updateMask != null && message.hasOwnProperty("updateMask")) {
-                                var error = $root.google.protobuf.FieldMask.verify(message.updateMask);
-                                if (error)
-                                    return "updateMask." + error;
-                            }
-                            if (message.autoGenerateIds != null && message.hasOwnProperty("autoGenerateIds"))
-                                if (typeof message.autoGenerateIds !== "boolean")
-                                    return "autoGenerateIds: boolean expected";
-                            if (message.idField != null && message.hasOwnProperty("idField"))
-                                if (!$util.isString(message.idField))
-                                    return "idField: string expected";
                             return null;
                         };
     
                         /**
-                         * Creates an ImportDocumentsRequest message from a plain object. Also converts values to their respective internal types.
+                         * Creates an ImportSuggestionDenyListEntriesRequest message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsRequest} ImportDocumentsRequest
+                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest} ImportSuggestionDenyListEntriesRequest
                          */
-                        ImportDocumentsRequest.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest)
+                        ImportSuggestionDenyListEntriesRequest.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest();
+                            var message = new $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest();
                             if (object.inlineSource != null) {
                                 if (typeof object.inlineSource !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.inlineSource: object expected");
-                                message.inlineSource = $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource.fromObject(object.inlineSource);
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.inlineSource: object expected");
+                                message.inlineSource = $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource.fromObject(object.inlineSource);
                             }
                             if (object.gcsSource != null) {
                                 if (typeof object.gcsSource !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.gcsSource: object expected");
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.gcsSource: object expected");
                                 message.gcsSource = $root.google.cloud.discoveryengine.v1.GcsSource.fromObject(object.gcsSource);
                             }
-                            if (object.bigquerySource != null) {
-                                if (typeof object.bigquerySource !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.bigquerySource: object expected");
-                                message.bigquerySource = $root.google.cloud.discoveryengine.v1.BigQuerySource.fromObject(object.bigquerySource);
-                            }
-                            if (object.fhirStoreSource != null) {
-                                if (typeof object.fhirStoreSource !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.fhirStoreSource: object expected");
-                                message.fhirStoreSource = $root.google.cloud.discoveryengine.v1.FhirStoreSource.fromObject(object.fhirStoreSource);
-                            }
-                            if (object.spannerSource != null) {
-                                if (typeof object.spannerSource !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.spannerSource: object expected");
-                                message.spannerSource = $root.google.cloud.discoveryengine.v1.SpannerSource.fromObject(object.spannerSource);
-                            }
-                            if (object.cloudSqlSource != null) {
-                                if (typeof object.cloudSqlSource !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.cloudSqlSource: object expected");
-                                message.cloudSqlSource = $root.google.cloud.discoveryengine.v1.CloudSqlSource.fromObject(object.cloudSqlSource);
-                            }
-                            if (object.firestoreSource != null) {
-                                if (typeof object.firestoreSource !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.firestoreSource: object expected");
-                                message.firestoreSource = $root.google.cloud.discoveryengine.v1.FirestoreSource.fromObject(object.firestoreSource);
-                            }
-                            if (object.bigtableSource != null) {
-                                if (typeof object.bigtableSource !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.bigtableSource: object expected");
-                                message.bigtableSource = $root.google.cloud.discoveryengine.v1.BigtableSource.fromObject(object.bigtableSource);
-                            }
                             if (object.parent != null)
                                 message.parent = String(object.parent);
-                            if (object.errorConfig != null) {
-                                if (typeof object.errorConfig !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.errorConfig: object expected");
-                                message.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.fromObject(object.errorConfig);
-                            }
-                            switch (object.reconciliationMode) {
-                            default:
-                                if (typeof object.reconciliationMode === "number") {
-                                    message.reconciliationMode = object.reconciliationMode;
-                                    break;
-                                }
-                                break;
-                            case "RECONCILIATION_MODE_UNSPECIFIED":
-                            case 0:
-                                message.reconciliationMode = 0;
-                                break;
-                            case "INCREMENTAL":
-                            case 1:
-                                message.reconciliationMode = 1;
-                                break;
-                            case "FULL":
-                            case 2:
-                                message.reconciliationMode = 2;
-                                break;
-                            }
-                            if (object.updateMask != null) {
-                                if (typeof object.updateMask !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.updateMask: object expected");
-                                message.updateMask = $root.google.protobuf.FieldMask.fromObject(object.updateMask);
-                            }
-                            if (object.autoGenerateIds != null)
-                                message.autoGenerateIds = Boolean(object.autoGenerateIds);
-                            if (object.idField != null)
-                                message.idField = String(object.idField);
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from an ImportDocumentsRequest message. Also converts values to other types if specified.
+                         * Creates a plain object from an ImportSuggestionDenyListEntriesRequest message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ImportDocumentsRequest} message ImportDocumentsRequest
+                         * @param {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest} message ImportSuggestionDenyListEntriesRequest
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        ImportDocumentsRequest.toObject = function toObject(message, options) {
+                        ImportSuggestionDenyListEntriesRequest.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
-                            if (options.defaults) {
+                            if (options.defaults)
                                 object.parent = "";
-                                object.errorConfig = null;
-                                object.reconciliationMode = options.enums === String ? "RECONCILIATION_MODE_UNSPECIFIED" : 0;
-                                object.updateMask = null;
-                                object.autoGenerateIds = false;
-                                object.idField = "";
-                            }
-                            if (message.parent != null && message.hasOwnProperty("parent"))
-                                object.parent = message.parent;
-                            if (message.inlineSource != null && message.hasOwnProperty("inlineSource")) {
-                                object.inlineSource = $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource.toObject(message.inlineSource, options);
-                                if (options.oneofs)
-                                    object.source = "inlineSource";
-                            }
-                            if (message.gcsSource != null && message.hasOwnProperty("gcsSource")) {
-                                object.gcsSource = $root.google.cloud.discoveryengine.v1.GcsSource.toObject(message.gcsSource, options);
-                                if (options.oneofs)
-                                    object.source = "gcsSource";
-                            }
-                            if (message.bigquerySource != null && message.hasOwnProperty("bigquerySource")) {
-                                object.bigquerySource = $root.google.cloud.discoveryengine.v1.BigQuerySource.toObject(message.bigquerySource, options);
-                                if (options.oneofs)
-                                    object.source = "bigquerySource";
-                            }
-                            if (message.errorConfig != null && message.hasOwnProperty("errorConfig"))
-                                object.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.toObject(message.errorConfig, options);
-                            if (message.reconciliationMode != null && message.hasOwnProperty("reconciliationMode"))
-                                object.reconciliationMode = options.enums === String ? $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest.ReconciliationMode[message.reconciliationMode] === undefined ? message.reconciliationMode : $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest.ReconciliationMode[message.reconciliationMode] : message.reconciliationMode;
-                            if (message.updateMask != null && message.hasOwnProperty("updateMask"))
-                                object.updateMask = $root.google.protobuf.FieldMask.toObject(message.updateMask, options);
-                            if (message.autoGenerateIds != null && message.hasOwnProperty("autoGenerateIds"))
-                                object.autoGenerateIds = message.autoGenerateIds;
-                            if (message.idField != null && message.hasOwnProperty("idField"))
-                                object.idField = message.idField;
-                            if (message.fhirStoreSource != null && message.hasOwnProperty("fhirStoreSource")) {
-                                object.fhirStoreSource = $root.google.cloud.discoveryengine.v1.FhirStoreSource.toObject(message.fhirStoreSource, options);
-                                if (options.oneofs)
-                                    object.source = "fhirStoreSource";
-                            }
-                            if (message.spannerSource != null && message.hasOwnProperty("spannerSource")) {
-                                object.spannerSource = $root.google.cloud.discoveryengine.v1.SpannerSource.toObject(message.spannerSource, options);
-                                if (options.oneofs)
-                                    object.source = "spannerSource";
-                            }
-                            if (message.cloudSqlSource != null && message.hasOwnProperty("cloudSqlSource")) {
-                                object.cloudSqlSource = $root.google.cloud.discoveryengine.v1.CloudSqlSource.toObject(message.cloudSqlSource, options);
-                                if (options.oneofs)
-                                    object.source = "cloudSqlSource";
-                            }
-                            if (message.firestoreSource != null && message.hasOwnProperty("firestoreSource")) {
-                                object.firestoreSource = $root.google.cloud.discoveryengine.v1.FirestoreSource.toObject(message.firestoreSource, options);
+                            if (message.parent != null && message.hasOwnProperty("parent"))
+                                object.parent = message.parent;
+                            if (message.inlineSource != null && message.hasOwnProperty("inlineSource")) {
+                                object.inlineSource = $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource.toObject(message.inlineSource, options);
                                 if (options.oneofs)
-                                    object.source = "firestoreSource";
+                                    object.source = "inlineSource";
                             }
-                            if (message.bigtableSource != null && message.hasOwnProperty("bigtableSource")) {
-                                object.bigtableSource = $root.google.cloud.discoveryengine.v1.BigtableSource.toObject(message.bigtableSource, options);
+                            if (message.gcsSource != null && message.hasOwnProperty("gcsSource")) {
+                                object.gcsSource = $root.google.cloud.discoveryengine.v1.GcsSource.toObject(message.gcsSource, options);
                                 if (options.oneofs)
-                                    object.source = "bigtableSource";
+                                    object.source = "gcsSource";
                             }
                             return object;
                         };
     
                         /**
-                         * Converts this ImportDocumentsRequest to JSON.
+                         * Converts this ImportSuggestionDenyListEntriesRequest to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        ImportDocumentsRequest.prototype.toJSON = function toJSON() {
+                        ImportSuggestionDenyListEntriesRequest.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for ImportDocumentsRequest
+                         * Gets the default type url for ImportSuggestionDenyListEntriesRequest
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        ImportDocumentsRequest.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        ImportSuggestionDenyListEntriesRequest.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportDocumentsRequest";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest";
                         };
     
-                        ImportDocumentsRequest.InlineSource = (function() {
+                        ImportSuggestionDenyListEntriesRequest.InlineSource = (function() {
     
                             /**
                              * Properties of an InlineSource.
-                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
                              * @interface IInlineSource
-                             * @property {Array.<google.cloud.discoveryengine.v1.IDocument>|null} [documents] InlineSource documents
+                             * @property {Array.<google.cloud.discoveryengine.v1.ISuggestionDenyListEntry>|null} [entries] InlineSource entries
                              */
     
                             /**
                              * Constructs a new InlineSource.
-                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest
+                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
                              * @classdesc Represents an InlineSource.
                              * @implements IInlineSource
                              * @constructor
-                             * @param {google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource=} [properties] Properties to set
+                             * @param {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource=} [properties] Properties to set
                              */
                             function InlineSource(properties) {
-                                this.documents = [];
+                                this.entries = [];
                                 if (properties)
                                     for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                         if (properties[keys[i]] != null)
@@ -12534,49 +15317,49 @@
                             }
     
                             /**
-                             * InlineSource documents.
-                             * @member {Array.<google.cloud.discoveryengine.v1.IDocument>} documents
-                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource
+                             * InlineSource entries.
+                             * @member {Array.<google.cloud.discoveryengine.v1.ISuggestionDenyListEntry>} entries
+                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource
                              * @instance
                              */
-                            InlineSource.prototype.documents = $util.emptyArray;
+                            InlineSource.prototype.entries = $util.emptyArray;
     
                             /**
                              * Creates a new InlineSource instance using the specified properties.
                              * @function create
-                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource
+                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource
                              * @static
-                             * @param {google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource=} [properties] Properties to set
-                             * @returns {google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource} InlineSource instance
+                             * @param {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource=} [properties] Properties to set
+                             * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource} InlineSource instance
                              */
                             InlineSource.create = function create(properties) {
                                 return new InlineSource(properties);
                             };
     
                             /**
-                             * Encodes the specified InlineSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource.verify|verify} messages.
+                             * Encodes the specified InlineSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource.verify|verify} messages.
                              * @function encode
-                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource
+                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource
                              * @static
-                             * @param {google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource} message InlineSource message or plain object to encode
+                             * @param {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource} message InlineSource message or plain object to encode
                              * @param {$protobuf.Writer} [writer] Writer to encode to
                              * @returns {$protobuf.Writer} Writer
                              */
                             InlineSource.encode = function encode(message, writer) {
                                 if (!writer)
                                     writer = $Writer.create();
-                                if (message.documents != null && message.documents.length)
-                                    for (var i = 0; i < message.documents.length; ++i)
-                                        $root.google.cloud.discoveryengine.v1.Document.encode(message.documents[i], writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                                if (message.entries != null && message.entries.length)
+                                    for (var i = 0; i < message.entries.length; ++i)
+                                        $root.google.cloud.discoveryengine.v1.SuggestionDenyListEntry.encode(message.entries[i], writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
                                 return writer;
                             };
     
                             /**
-                             * Encodes the specified InlineSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource.verify|verify} messages.
+                             * Encodes the specified InlineSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource.verify|verify} messages.
                              * @function encodeDelimited
-                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource
+                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource
                              * @static
-                             * @param {google.cloud.discoveryengine.v1.ImportDocumentsRequest.IInlineSource} message InlineSource message or plain object to encode
+                             * @param {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource} message InlineSource message or plain object to encode
                              * @param {$protobuf.Writer} [writer] Writer to encode to
                              * @returns {$protobuf.Writer} Writer
                              */
@@ -12587,25 +15370,25 @@
                             /**
                              * Decodes an InlineSource message from the specified reader or buffer.
                              * @function decode
-                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource
+                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource
                              * @static
                              * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                              * @param {number} [length] Message length if known beforehand
-                             * @returns {google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource} InlineSource
+                             * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource} InlineSource
                              * @throws {Error} If the payload is not a reader or valid buffer
                              * @throws {$protobuf.util.ProtocolError} If required fields are missing
                              */
                             InlineSource.decode = function decode(reader, length) {
                                 if (!(reader instanceof $Reader))
                                     reader = $Reader.create(reader);
-                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource();
+                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource();
                                 while (reader.pos < end) {
                                     var tag = reader.uint32();
                                     switch (tag >>> 3) {
                                     case 1: {
-                                            if (!(message.documents && message.documents.length))
-                                                message.documents = [];
-                                            message.documents.push($root.google.cloud.discoveryengine.v1.Document.decode(reader, reader.uint32()));
+                                            if (!(message.entries && message.entries.length))
+                                                message.entries = [];
+                                            message.entries.push($root.google.cloud.discoveryengine.v1.SuggestionDenyListEntry.decode(reader, reader.uint32()));
                                             break;
                                         }
                                     default:
@@ -12619,10 +15402,10 @@
                             /**
                              * Decodes an InlineSource message from the specified reader or buffer, length delimited.
                              * @function decodeDelimited
-                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource
+                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource
                              * @static
                              * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                             * @returns {google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource} InlineSource
+                             * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource} InlineSource
                              * @throws {Error} If the payload is not a reader or valid buffer
                              * @throws {$protobuf.util.ProtocolError} If required fields are missing
                              */
@@ -12635,7 +15418,7 @@
                             /**
                              * Verifies an InlineSource message.
                              * @function verify
-                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource
+                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource
                              * @static
                              * @param {Object.<string,*>} message Plain object to verify
                              * @returns {string|null} `null` if valid, otherwise the reason why it is not
@@ -12643,13 +15426,13 @@
                             InlineSource.verify = function verify(message) {
                                 if (typeof message !== "object" || message === null)
                                     return "object expected";
-                                if (message.documents != null && message.hasOwnProperty("documents")) {
-                                    if (!Array.isArray(message.documents))
-                                        return "documents: array expected";
-                                    for (var i = 0; i < message.documents.length; ++i) {
-                                        var error = $root.google.cloud.discoveryengine.v1.Document.verify(message.documents[i]);
+                                if (message.entries != null && message.hasOwnProperty("entries")) {
+                                    if (!Array.isArray(message.entries))
+                                        return "entries: array expected";
+                                    for (var i = 0; i < message.entries.length; ++i) {
+                                        var error = $root.google.cloud.discoveryengine.v1.SuggestionDenyListEntry.verify(message.entries[i]);
                                         if (error)
-                                            return "documents." + error;
+                                            return "entries." + error;
                                     }
                                 }
                                 return null;
@@ -12658,23 +15441,23 @@
                             /**
                              * Creates an InlineSource message from a plain object. Also converts values to their respective internal types.
                              * @function fromObject
-                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource
+                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource
                              * @static
                              * @param {Object.<string,*>} object Plain object
-                             * @returns {google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource} InlineSource
+                             * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource} InlineSource
                              */
                             InlineSource.fromObject = function fromObject(object) {
-                                if (object instanceof $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource)
+                                if (object instanceof $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource)
                                     return object;
-                                var message = new $root.google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource();
-                                if (object.documents) {
-                                    if (!Array.isArray(object.documents))
-                                        throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource.documents: array expected");
-                                    message.documents = [];
-                                    for (var i = 0; i < object.documents.length; ++i) {
-                                        if (typeof object.documents[i] !== "object")
-                                            throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource.documents: object expected");
-                                        message.documents[i] = $root.google.cloud.discoveryengine.v1.Document.fromObject(object.documents[i]);
+                                var message = new $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource();
+                                if (object.entries) {
+                                    if (!Array.isArray(object.entries))
+                                        throw TypeError(".google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource.entries: array expected");
+                                    message.entries = [];
+                                    for (var i = 0; i < object.entries.length; ++i) {
+                                        if (typeof object.entries[i] !== "object")
+                                            throw TypeError(".google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource.entries: object expected");
+                                        message.entries[i] = $root.google.cloud.discoveryengine.v1.SuggestionDenyListEntry.fromObject(object.entries[i]);
                                     }
                                 }
                                 return message;
@@ -12683,9 +15466,9 @@
                             /**
                              * Creates a plain object from an InlineSource message. Also converts values to other types if specified.
                              * @function toObject
-                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource
+                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource
                              * @static
-                             * @param {google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource} message InlineSource
+                             * @param {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource} message InlineSource
                              * @param {$protobuf.IConversionOptions} [options] Conversion options
                              * @returns {Object.<string,*>} Plain object
                              */
@@ -12694,11 +15477,11 @@
                                     options = {};
                                 var object = {};
                                 if (options.arrays || options.defaults)
-                                    object.documents = [];
-                                if (message.documents && message.documents.length) {
-                                    object.documents = [];
-                                    for (var j = 0; j < message.documents.length; ++j)
-                                        object.documents[j] = $root.google.cloud.discoveryengine.v1.Document.toObject(message.documents[j], options);
+                                    object.entries = [];
+                                if (message.entries && message.entries.length) {
+                                    object.entries = [];
+                                    for (var j = 0; j < message.entries.length; ++j)
+                                        object.entries[j] = $root.google.cloud.discoveryengine.v1.SuggestionDenyListEntry.toObject(message.entries[j], options);
                                 }
                                 return object;
                             };
@@ -12706,7 +15489,7 @@
                             /**
                              * Converts this InlineSource to JSON.
                              * @function toJSON
-                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource
+                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource
                              * @instance
                              * @returns {Object.<string,*>} JSON object
                              */
@@ -12717,7 +15500,7 @@
                             /**
                              * Gets the default type url for InlineSource
                              * @function getTypeUrl
-                             * @memberof google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource
+                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource
                              * @static
                              * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                              * @returns {string} The default type url
@@ -12726,50 +15509,35 @@
                                 if (typeUrlPrefix === undefined) {
                                     typeUrlPrefix = "type.googleapis.com";
                                 }
-                                return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportDocumentsRequest.InlineSource";
+                                return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource";
                             };
     
                             return InlineSource;
                         })();
     
-                        /**
-                         * ReconciliationMode enum.
-                         * @name google.cloud.discoveryengine.v1.ImportDocumentsRequest.ReconciliationMode
-                         * @enum {number}
-                         * @property {number} RECONCILIATION_MODE_UNSPECIFIED=0 RECONCILIATION_MODE_UNSPECIFIED value
-                         * @property {number} INCREMENTAL=1 INCREMENTAL value
-                         * @property {number} FULL=2 FULL value
-                         */
-                        ImportDocumentsRequest.ReconciliationMode = (function() {
-                            var valuesById = {}, values = Object.create(valuesById);
-                            values[valuesById[0] = "RECONCILIATION_MODE_UNSPECIFIED"] = 0;
-                            values[valuesById[1] = "INCREMENTAL"] = 1;
-                            values[valuesById[2] = "FULL"] = 2;
-                            return values;
-                        })();
-    
-                        return ImportDocumentsRequest;
+                        return ImportSuggestionDenyListEntriesRequest;
                     })();
     
-                    v1.ImportDocumentsResponse = (function() {
+                    v1.ImportSuggestionDenyListEntriesResponse = (function() {
     
                         /**
-                         * Properties of an ImportDocumentsResponse.
+                         * Properties of an ImportSuggestionDenyListEntriesResponse.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IImportDocumentsResponse
-                         * @property {Array.<google.rpc.IStatus>|null} [errorSamples] ImportDocumentsResponse errorSamples
-                         * @property {google.cloud.discoveryengine.v1.IImportErrorConfig|null} [errorConfig] ImportDocumentsResponse errorConfig
+                         * @interface IImportSuggestionDenyListEntriesResponse
+                         * @property {Array.<google.rpc.IStatus>|null} [errorSamples] ImportSuggestionDenyListEntriesResponse errorSamples
+                         * @property {number|Long|null} [importedEntriesCount] ImportSuggestionDenyListEntriesResponse importedEntriesCount
+                         * @property {number|Long|null} [failedEntriesCount] ImportSuggestionDenyListEntriesResponse failedEntriesCount
                          */
     
                         /**
-                         * Constructs a new ImportDocumentsResponse.
+                         * Constructs a new ImportSuggestionDenyListEntriesResponse.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents an ImportDocumentsResponse.
-                         * @implements IImportDocumentsResponse
+                         * @classdesc Represents an ImportSuggestionDenyListEntriesResponse.
+                         * @implements IImportSuggestionDenyListEntriesResponse
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsResponse=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesResponse=} [properties] Properties to set
                          */
-                        function ImportDocumentsResponse(properties) {
+                        function ImportSuggestionDenyListEntriesResponse(properties) {
                             this.errorSamples = [];
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
@@ -12778,92 +15546,387 @@
                         }
     
                         /**
-                         * ImportDocumentsResponse errorSamples.
+                         * ImportSuggestionDenyListEntriesResponse errorSamples.
                          * @member {Array.<google.rpc.IStatus>} errorSamples
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
                          * @instance
                          */
-                        ImportDocumentsResponse.prototype.errorSamples = $util.emptyArray;
+                        ImportSuggestionDenyListEntriesResponse.prototype.errorSamples = $util.emptyArray;
     
                         /**
-                         * ImportDocumentsResponse errorConfig.
-                         * @member {google.cloud.discoveryengine.v1.IImportErrorConfig|null|undefined} errorConfig
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
+                         * ImportSuggestionDenyListEntriesResponse importedEntriesCount.
+                         * @member {number|Long} importedEntriesCount
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
                          * @instance
                          */
-                        ImportDocumentsResponse.prototype.errorConfig = null;
+                        ImportSuggestionDenyListEntriesResponse.prototype.importedEntriesCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
     
                         /**
-                         * Creates a new ImportDocumentsResponse instance using the specified properties.
+                         * ImportSuggestionDenyListEntriesResponse failedEntriesCount.
+                         * @member {number|Long} failedEntriesCount
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
+                         * @instance
+                         */
+                        ImportSuggestionDenyListEntriesResponse.prototype.failedEntriesCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
+    
+                        /**
+                         * Creates a new ImportSuggestionDenyListEntriesResponse instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsResponse=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsResponse} ImportDocumentsResponse instance
+                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesResponse=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse} ImportSuggestionDenyListEntriesResponse instance
                          */
-                        ImportDocumentsResponse.create = function create(properties) {
-                            return new ImportDocumentsResponse(properties);
+                        ImportSuggestionDenyListEntriesResponse.create = function create(properties) {
+                            return new ImportSuggestionDenyListEntriesResponse(properties);
                         };
     
                         /**
-                         * Encodes the specified ImportDocumentsResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsResponse.verify|verify} messages.
+                         * Encodes the specified ImportSuggestionDenyListEntriesResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsResponse} message ImportDocumentsResponse message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesResponse} message ImportSuggestionDenyListEntriesResponse message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        ImportDocumentsResponse.encode = function encode(message, writer) {
+                        ImportSuggestionDenyListEntriesResponse.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
                             if (message.errorSamples != null && message.errorSamples.length)
                                 for (var i = 0; i < message.errorSamples.length; ++i)
                                     $root.google.rpc.Status.encode(message.errorSamples[i], writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
-                            if (message.errorConfig != null && Object.hasOwnProperty.call(message, "errorConfig"))
-                                $root.google.cloud.discoveryengine.v1.ImportErrorConfig.encode(message.errorConfig, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                            if (message.importedEntriesCount != null && Object.hasOwnProperty.call(message, "importedEntriesCount"))
+                                writer.uint32(/* id 2, wireType 0 =*/16).int64(message.importedEntriesCount);
+                            if (message.failedEntriesCount != null && Object.hasOwnProperty.call(message, "failedEntriesCount"))
+                                writer.uint32(/* id 3, wireType 0 =*/24).int64(message.failedEntriesCount);
+                            return writer;
+                        };
+    
+                        /**
+                         * Encodes the specified ImportSuggestionDenyListEntriesResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse.verify|verify} messages.
+                         * @function encodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesResponse} message ImportSuggestionDenyListEntriesResponse message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        ImportSuggestionDenyListEntriesResponse.encodeDelimited = function encodeDelimited(message, writer) {
+                            return this.encode(message, writer).ldelim();
+                        };
+    
+                        /**
+                         * Decodes an ImportSuggestionDenyListEntriesResponse message from the specified reader or buffer.
+                         * @function decode
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @param {number} [length] Message length if known beforehand
+                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse} ImportSuggestionDenyListEntriesResponse
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        ImportSuggestionDenyListEntriesResponse.decode = function decode(reader, length) {
+                            if (!(reader instanceof $Reader))
+                                reader = $Reader.create(reader);
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse();
+                            while (reader.pos < end) {
+                                var tag = reader.uint32();
+                                switch (tag >>> 3) {
+                                case 1: {
+                                        if (!(message.errorSamples && message.errorSamples.length))
+                                            message.errorSamples = [];
+                                        message.errorSamples.push($root.google.rpc.Status.decode(reader, reader.uint32()));
+                                        break;
+                                    }
+                                case 2: {
+                                        message.importedEntriesCount = reader.int64();
+                                        break;
+                                    }
+                                case 3: {
+                                        message.failedEntriesCount = reader.int64();
+                                        break;
+                                    }
+                                default:
+                                    reader.skipType(tag & 7);
+                                    break;
+                                }
+                            }
+                            return message;
+                        };
+    
+                        /**
+                         * Decodes an ImportSuggestionDenyListEntriesResponse message from the specified reader or buffer, length delimited.
+                         * @function decodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse} ImportSuggestionDenyListEntriesResponse
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        ImportSuggestionDenyListEntriesResponse.decodeDelimited = function decodeDelimited(reader) {
+                            if (!(reader instanceof $Reader))
+                                reader = new $Reader(reader);
+                            return this.decode(reader, reader.uint32());
+                        };
+    
+                        /**
+                         * Verifies an ImportSuggestionDenyListEntriesResponse message.
+                         * @function verify
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
+                         * @static
+                         * @param {Object.<string,*>} message Plain object to verify
+                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                         */
+                        ImportSuggestionDenyListEntriesResponse.verify = function verify(message) {
+                            if (typeof message !== "object" || message === null)
+                                return "object expected";
+                            if (message.errorSamples != null && message.hasOwnProperty("errorSamples")) {
+                                if (!Array.isArray(message.errorSamples))
+                                    return "errorSamples: array expected";
+                                for (var i = 0; i < message.errorSamples.length; ++i) {
+                                    var error = $root.google.rpc.Status.verify(message.errorSamples[i]);
+                                    if (error)
+                                        return "errorSamples." + error;
+                                }
+                            }
+                            if (message.importedEntriesCount != null && message.hasOwnProperty("importedEntriesCount"))
+                                if (!$util.isInteger(message.importedEntriesCount) && !(message.importedEntriesCount && $util.isInteger(message.importedEntriesCount.low) && $util.isInteger(message.importedEntriesCount.high)))
+                                    return "importedEntriesCount: integer|Long expected";
+                            if (message.failedEntriesCount != null && message.hasOwnProperty("failedEntriesCount"))
+                                if (!$util.isInteger(message.failedEntriesCount) && !(message.failedEntriesCount && $util.isInteger(message.failedEntriesCount.low) && $util.isInteger(message.failedEntriesCount.high)))
+                                    return "failedEntriesCount: integer|Long expected";
+                            return null;
+                        };
+    
+                        /**
+                         * Creates an ImportSuggestionDenyListEntriesResponse message from a plain object. Also converts values to their respective internal types.
+                         * @function fromObject
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
+                         * @static
+                         * @param {Object.<string,*>} object Plain object
+                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse} ImportSuggestionDenyListEntriesResponse
+                         */
+                        ImportSuggestionDenyListEntriesResponse.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse)
+                                return object;
+                            var message = new $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse();
+                            if (object.errorSamples) {
+                                if (!Array.isArray(object.errorSamples))
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse.errorSamples: array expected");
+                                message.errorSamples = [];
+                                for (var i = 0; i < object.errorSamples.length; ++i) {
+                                    if (typeof object.errorSamples[i] !== "object")
+                                        throw TypeError(".google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse.errorSamples: object expected");
+                                    message.errorSamples[i] = $root.google.rpc.Status.fromObject(object.errorSamples[i]);
+                                }
+                            }
+                            if (object.importedEntriesCount != null)
+                                if ($util.Long)
+                                    (message.importedEntriesCount = $util.Long.fromValue(object.importedEntriesCount)).unsigned = false;
+                                else if (typeof object.importedEntriesCount === "string")
+                                    message.importedEntriesCount = parseInt(object.importedEntriesCount, 10);
+                                else if (typeof object.importedEntriesCount === "number")
+                                    message.importedEntriesCount = object.importedEntriesCount;
+                                else if (typeof object.importedEntriesCount === "object")
+                                    message.importedEntriesCount = new $util.LongBits(object.importedEntriesCount.low >>> 0, object.importedEntriesCount.high >>> 0).toNumber();
+                            if (object.failedEntriesCount != null)
+                                if ($util.Long)
+                                    (message.failedEntriesCount = $util.Long.fromValue(object.failedEntriesCount)).unsigned = false;
+                                else if (typeof object.failedEntriesCount === "string")
+                                    message.failedEntriesCount = parseInt(object.failedEntriesCount, 10);
+                                else if (typeof object.failedEntriesCount === "number")
+                                    message.failedEntriesCount = object.failedEntriesCount;
+                                else if (typeof object.failedEntriesCount === "object")
+                                    message.failedEntriesCount = new $util.LongBits(object.failedEntriesCount.low >>> 0, object.failedEntriesCount.high >>> 0).toNumber();
+                            return message;
+                        };
+    
+                        /**
+                         * Creates a plain object from an ImportSuggestionDenyListEntriesResponse message. Also converts values to other types if specified.
+                         * @function toObject
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse} message ImportSuggestionDenyListEntriesResponse
+                         * @param {$protobuf.IConversionOptions} [options] Conversion options
+                         * @returns {Object.<string,*>} Plain object
+                         */
+                        ImportSuggestionDenyListEntriesResponse.toObject = function toObject(message, options) {
+                            if (!options)
+                                options = {};
+                            var object = {};
+                            if (options.arrays || options.defaults)
+                                object.errorSamples = [];
+                            if (options.defaults) {
+                                if ($util.Long) {
+                                    var long = new $util.Long(0, 0, false);
+                                    object.importedEntriesCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
+                                } else
+                                    object.importedEntriesCount = options.longs === String ? "0" : 0;
+                                if ($util.Long) {
+                                    var long = new $util.Long(0, 0, false);
+                                    object.failedEntriesCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
+                                } else
+                                    object.failedEntriesCount = options.longs === String ? "0" : 0;
+                            }
+                            if (message.errorSamples && message.errorSamples.length) {
+                                object.errorSamples = [];
+                                for (var j = 0; j < message.errorSamples.length; ++j)
+                                    object.errorSamples[j] = $root.google.rpc.Status.toObject(message.errorSamples[j], options);
+                            }
+                            if (message.importedEntriesCount != null && message.hasOwnProperty("importedEntriesCount"))
+                                if (typeof message.importedEntriesCount === "number")
+                                    object.importedEntriesCount = options.longs === String ? String(message.importedEntriesCount) : message.importedEntriesCount;
+                                else
+                                    object.importedEntriesCount = options.longs === String ? $util.Long.prototype.toString.call(message.importedEntriesCount) : options.longs === Number ? new $util.LongBits(message.importedEntriesCount.low >>> 0, message.importedEntriesCount.high >>> 0).toNumber() : message.importedEntriesCount;
+                            if (message.failedEntriesCount != null && message.hasOwnProperty("failedEntriesCount"))
+                                if (typeof message.failedEntriesCount === "number")
+                                    object.failedEntriesCount = options.longs === String ? String(message.failedEntriesCount) : message.failedEntriesCount;
+                                else
+                                    object.failedEntriesCount = options.longs === String ? $util.Long.prototype.toString.call(message.failedEntriesCount) : options.longs === Number ? new $util.LongBits(message.failedEntriesCount.low >>> 0, message.failedEntriesCount.high >>> 0).toNumber() : message.failedEntriesCount;
+                            return object;
+                        };
+    
+                        /**
+                         * Converts this ImportSuggestionDenyListEntriesResponse to JSON.
+                         * @function toJSON
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
+                         * @instance
+                         * @returns {Object.<string,*>} JSON object
+                         */
+                        ImportSuggestionDenyListEntriesResponse.prototype.toJSON = function toJSON() {
+                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                        };
+    
+                        /**
+                         * Gets the default type url for ImportSuggestionDenyListEntriesResponse
+                         * @function getTypeUrl
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
+                         * @static
+                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns {string} The default type url
+                         */
+                        ImportSuggestionDenyListEntriesResponse.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                            if (typeUrlPrefix === undefined) {
+                                typeUrlPrefix = "type.googleapis.com";
+                            }
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse";
+                        };
+    
+                        return ImportSuggestionDenyListEntriesResponse;
+                    })();
+    
+                    v1.ImportSuggestionDenyListEntriesMetadata = (function() {
+    
+                        /**
+                         * Properties of an ImportSuggestionDenyListEntriesMetadata.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @interface IImportSuggestionDenyListEntriesMetadata
+                         * @property {google.protobuf.ITimestamp|null} [createTime] ImportSuggestionDenyListEntriesMetadata createTime
+                         * @property {google.protobuf.ITimestamp|null} [updateTime] ImportSuggestionDenyListEntriesMetadata updateTime
+                         */
+    
+                        /**
+                         * Constructs a new ImportSuggestionDenyListEntriesMetadata.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @classdesc Represents an ImportSuggestionDenyListEntriesMetadata.
+                         * @implements IImportSuggestionDenyListEntriesMetadata
+                         * @constructor
+                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesMetadata=} [properties] Properties to set
+                         */
+                        function ImportSuggestionDenyListEntriesMetadata(properties) {
+                            if (properties)
+                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                    if (properties[keys[i]] != null)
+                                        this[keys[i]] = properties[keys[i]];
+                        }
+    
+                        /**
+                         * ImportSuggestionDenyListEntriesMetadata createTime.
+                         * @member {google.protobuf.ITimestamp|null|undefined} createTime
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
+                         * @instance
+                         */
+                        ImportSuggestionDenyListEntriesMetadata.prototype.createTime = null;
+    
+                        /**
+                         * ImportSuggestionDenyListEntriesMetadata updateTime.
+                         * @member {google.protobuf.ITimestamp|null|undefined} updateTime
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
+                         * @instance
+                         */
+                        ImportSuggestionDenyListEntriesMetadata.prototype.updateTime = null;
+    
+                        /**
+                         * Creates a new ImportSuggestionDenyListEntriesMetadata instance using the specified properties.
+                         * @function create
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesMetadata=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata} ImportSuggestionDenyListEntriesMetadata instance
+                         */
+                        ImportSuggestionDenyListEntriesMetadata.create = function create(properties) {
+                            return new ImportSuggestionDenyListEntriesMetadata(properties);
+                        };
+    
+                        /**
+                         * Encodes the specified ImportSuggestionDenyListEntriesMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata.verify|verify} messages.
+                         * @function encode
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesMetadata} message ImportSuggestionDenyListEntriesMetadata message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        ImportSuggestionDenyListEntriesMetadata.encode = function encode(message, writer) {
+                            if (!writer)
+                                writer = $Writer.create();
+                            if (message.createTime != null && Object.hasOwnProperty.call(message, "createTime"))
+                                $root.google.protobuf.Timestamp.encode(message.createTime, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                            if (message.updateTime != null && Object.hasOwnProperty.call(message, "updateTime"))
+                                $root.google.protobuf.Timestamp.encode(message.updateTime, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified ImportDocumentsResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportDocumentsResponse.verify|verify} messages.
+                         * Encodes the specified ImportSuggestionDenyListEntriesMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportDocumentsResponse} message ImportDocumentsResponse message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesMetadata} message ImportSuggestionDenyListEntriesMetadata message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        ImportDocumentsResponse.encodeDelimited = function encodeDelimited(message, writer) {
+                        ImportSuggestionDenyListEntriesMetadata.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes an ImportDocumentsResponse message from the specified reader or buffer.
+                         * Decodes an ImportSuggestionDenyListEntriesMetadata message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsResponse} ImportDocumentsResponse
+                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata} ImportSuggestionDenyListEntriesMetadata
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        ImportDocumentsResponse.decode = function decode(reader, length) {
+                        ImportSuggestionDenyListEntriesMetadata.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportDocumentsResponse();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 1: {
-                                        if (!(message.errorSamples && message.errorSamples.length))
-                                            message.errorSamples = [];
-                                        message.errorSamples.push($root.google.rpc.Status.decode(reader, reader.uint32()));
+                                        message.createTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
                                         break;
                                     }
                                 case 2: {
-                                        message.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.decode(reader, reader.uint32());
+                                        message.updateTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
                                         break;
                                     }
                                 default:
@@ -12875,155 +15938,145 @@
                         };
     
                         /**
-                         * Decodes an ImportDocumentsResponse message from the specified reader or buffer, length delimited.
+                         * Decodes an ImportSuggestionDenyListEntriesMetadata message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsResponse} ImportDocumentsResponse
+                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata} ImportSuggestionDenyListEntriesMetadata
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        ImportDocumentsResponse.decodeDelimited = function decodeDelimited(reader) {
+                        ImportSuggestionDenyListEntriesMetadata.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies an ImportDocumentsResponse message.
+                         * Verifies an ImportSuggestionDenyListEntriesMetadata message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        ImportDocumentsResponse.verify = function verify(message) {
+                        ImportSuggestionDenyListEntriesMetadata.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            if (message.errorSamples != null && message.hasOwnProperty("errorSamples")) {
-                                if (!Array.isArray(message.errorSamples))
-                                    return "errorSamples: array expected";
-                                for (var i = 0; i < message.errorSamples.length; ++i) {
-                                    var error = $root.google.rpc.Status.verify(message.errorSamples[i]);
-                                    if (error)
-                                        return "errorSamples." + error;
-                                }
+                            if (message.createTime != null && message.hasOwnProperty("createTime")) {
+                                var error = $root.google.protobuf.Timestamp.verify(message.createTime);
+                                if (error)
+                                    return "createTime." + error;
                             }
-                            if (message.errorConfig != null && message.hasOwnProperty("errorConfig")) {
-                                var error = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.verify(message.errorConfig);
+                            if (message.updateTime != null && message.hasOwnProperty("updateTime")) {
+                                var error = $root.google.protobuf.Timestamp.verify(message.updateTime);
                                 if (error)
-                                    return "errorConfig." + error;
+                                    return "updateTime." + error;
                             }
                             return null;
                         };
     
                         /**
-                         * Creates an ImportDocumentsResponse message from a plain object. Also converts values to their respective internal types.
+                         * Creates an ImportSuggestionDenyListEntriesMetadata message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.ImportDocumentsResponse} ImportDocumentsResponse
+                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata} ImportSuggestionDenyListEntriesMetadata
                          */
-                        ImportDocumentsResponse.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.ImportDocumentsResponse)
+                        ImportSuggestionDenyListEntriesMetadata.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.ImportDocumentsResponse();
-                            if (object.errorSamples) {
-                                if (!Array.isArray(object.errorSamples))
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsResponse.errorSamples: array expected");
-                                message.errorSamples = [];
-                                for (var i = 0; i < object.errorSamples.length; ++i) {
-                                    if (typeof object.errorSamples[i] !== "object")
-                                        throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsResponse.errorSamples: object expected");
-                                    message.errorSamples[i] = $root.google.rpc.Status.fromObject(object.errorSamples[i]);
-                                }
+                            var message = new $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata();
+                            if (object.createTime != null) {
+                                if (typeof object.createTime !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata.createTime: object expected");
+                                message.createTime = $root.google.protobuf.Timestamp.fromObject(object.createTime);
                             }
-                            if (object.errorConfig != null) {
-                                if (typeof object.errorConfig !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportDocumentsResponse.errorConfig: object expected");
-                                message.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.fromObject(object.errorConfig);
+                            if (object.updateTime != null) {
+                                if (typeof object.updateTime !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata.updateTime: object expected");
+                                message.updateTime = $root.google.protobuf.Timestamp.fromObject(object.updateTime);
                             }
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from an ImportDocumentsResponse message. Also converts values to other types if specified.
+                         * Creates a plain object from an ImportSuggestionDenyListEntriesMetadata message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ImportDocumentsResponse} message ImportDocumentsResponse
+                         * @param {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata} message ImportSuggestionDenyListEntriesMetadata
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        ImportDocumentsResponse.toObject = function toObject(message, options) {
+                        ImportSuggestionDenyListEntriesMetadata.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
-                            if (options.arrays || options.defaults)
-                                object.errorSamples = [];
-                            if (options.defaults)
-                                object.errorConfig = null;
-                            if (message.errorSamples && message.errorSamples.length) {
-                                object.errorSamples = [];
-                                for (var j = 0; j < message.errorSamples.length; ++j)
-                                    object.errorSamples[j] = $root.google.rpc.Status.toObject(message.errorSamples[j], options);
+                            if (options.defaults) {
+                                object.createTime = null;
+                                object.updateTime = null;
                             }
-                            if (message.errorConfig != null && message.hasOwnProperty("errorConfig"))
-                                object.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.toObject(message.errorConfig, options);
+                            if (message.createTime != null && message.hasOwnProperty("createTime"))
+                                object.createTime = $root.google.protobuf.Timestamp.toObject(message.createTime, options);
+                            if (message.updateTime != null && message.hasOwnProperty("updateTime"))
+                                object.updateTime = $root.google.protobuf.Timestamp.toObject(message.updateTime, options);
                             return object;
                         };
     
                         /**
-                         * Converts this ImportDocumentsResponse to JSON.
+                         * Converts this ImportSuggestionDenyListEntriesMetadata to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        ImportDocumentsResponse.prototype.toJSON = function toJSON() {
+                        ImportSuggestionDenyListEntriesMetadata.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for ImportDocumentsResponse
+                         * Gets the default type url for ImportSuggestionDenyListEntriesMetadata
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.ImportDocumentsResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        ImportDocumentsResponse.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        ImportSuggestionDenyListEntriesMetadata.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportDocumentsResponse";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata";
                         };
     
-                        return ImportDocumentsResponse;
+                        return ImportSuggestionDenyListEntriesMetadata;
                     })();
     
-                    v1.ImportSuggestionDenyListEntriesRequest = (function() {
+                    v1.ImportCompletionSuggestionsRequest = (function() {
     
                         /**
-                         * Properties of an ImportSuggestionDenyListEntriesRequest.
+                         * Properties of an ImportCompletionSuggestionsRequest.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IImportSuggestionDenyListEntriesRequest
-                         * @property {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource|null} [inlineSource] ImportSuggestionDenyListEntriesRequest inlineSource
-                         * @property {google.cloud.discoveryengine.v1.IGcsSource|null} [gcsSource] ImportSuggestionDenyListEntriesRequest gcsSource
-                         * @property {string|null} [parent] ImportSuggestionDenyListEntriesRequest parent
+                         * @interface IImportCompletionSuggestionsRequest
+                         * @property {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.IInlineSource|null} [inlineSource] ImportCompletionSuggestionsRequest inlineSource
+                         * @property {google.cloud.discoveryengine.v1.IGcsSource|null} [gcsSource] ImportCompletionSuggestionsRequest gcsSource
+                         * @property {google.cloud.discoveryengine.v1.IBigQuerySource|null} [bigquerySource] ImportCompletionSuggestionsRequest bigquerySource
+                         * @property {string|null} [parent] ImportCompletionSuggestionsRequest parent
+                         * @property {google.cloud.discoveryengine.v1.IImportErrorConfig|null} [errorConfig] ImportCompletionSuggestionsRequest errorConfig
                          */
     
                         /**
-                         * Constructs a new ImportSuggestionDenyListEntriesRequest.
+                         * Constructs a new ImportCompletionSuggestionsRequest.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents an ImportSuggestionDenyListEntriesRequest.
-                         * @implements IImportSuggestionDenyListEntriesRequest
+                         * @classdesc Represents an ImportCompletionSuggestionsRequest.
+                         * @implements IImportCompletionSuggestionsRequest
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesRequest=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IImportCompletionSuggestionsRequest=} [properties] Properties to set
                          */
-                        function ImportSuggestionDenyListEntriesRequest(properties) {
+                        function ImportCompletionSuggestionsRequest(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -13031,119 +16084,147 @@
                         }
     
                         /**
-                         * ImportSuggestionDenyListEntriesRequest inlineSource.
-                         * @member {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource|null|undefined} inlineSource
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
+                         * ImportCompletionSuggestionsRequest inlineSource.
+                         * @member {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.IInlineSource|null|undefined} inlineSource
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest
                          * @instance
                          */
-                        ImportSuggestionDenyListEntriesRequest.prototype.inlineSource = null;
+                        ImportCompletionSuggestionsRequest.prototype.inlineSource = null;
     
                         /**
-                         * ImportSuggestionDenyListEntriesRequest gcsSource.
+                         * ImportCompletionSuggestionsRequest gcsSource.
                          * @member {google.cloud.discoveryengine.v1.IGcsSource|null|undefined} gcsSource
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest
                          * @instance
                          */
-                        ImportSuggestionDenyListEntriesRequest.prototype.gcsSource = null;
+                        ImportCompletionSuggestionsRequest.prototype.gcsSource = null;
     
                         /**
-                         * ImportSuggestionDenyListEntriesRequest parent.
+                         * ImportCompletionSuggestionsRequest bigquerySource.
+                         * @member {google.cloud.discoveryengine.v1.IBigQuerySource|null|undefined} bigquerySource
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest
+                         * @instance
+                         */
+                        ImportCompletionSuggestionsRequest.prototype.bigquerySource = null;
+    
+                        /**
+                         * ImportCompletionSuggestionsRequest parent.
                          * @member {string} parent
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest
                          * @instance
                          */
-                        ImportSuggestionDenyListEntriesRequest.prototype.parent = "";
+                        ImportCompletionSuggestionsRequest.prototype.parent = "";
+    
+                        /**
+                         * ImportCompletionSuggestionsRequest errorConfig.
+                         * @member {google.cloud.discoveryengine.v1.IImportErrorConfig|null|undefined} errorConfig
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest
+                         * @instance
+                         */
+                        ImportCompletionSuggestionsRequest.prototype.errorConfig = null;
     
                         // OneOf field names bound to virtual getters and setters
                         var $oneOfFields;
     
                         /**
-                         * ImportSuggestionDenyListEntriesRequest source.
-                         * @member {"inlineSource"|"gcsSource"|undefined} source
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
+                         * ImportCompletionSuggestionsRequest source.
+                         * @member {"inlineSource"|"gcsSource"|"bigquerySource"|undefined} source
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest
                          * @instance
                          */
-                        Object.defineProperty(ImportSuggestionDenyListEntriesRequest.prototype, "source", {
-                            get: $util.oneOfGetter($oneOfFields = ["inlineSource", "gcsSource"]),
+                        Object.defineProperty(ImportCompletionSuggestionsRequest.prototype, "source", {
+                            get: $util.oneOfGetter($oneOfFields = ["inlineSource", "gcsSource", "bigquerySource"]),
                             set: $util.oneOfSetter($oneOfFields)
                         });
     
                         /**
-                         * Creates a new ImportSuggestionDenyListEntriesRequest instance using the specified properties.
+                         * Creates a new ImportCompletionSuggestionsRequest instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesRequest=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest} ImportSuggestionDenyListEntriesRequest instance
+                         * @param {google.cloud.discoveryengine.v1.IImportCompletionSuggestionsRequest=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest} ImportCompletionSuggestionsRequest instance
                          */
-                        ImportSuggestionDenyListEntriesRequest.create = function create(properties) {
-                            return new ImportSuggestionDenyListEntriesRequest(properties);
+                        ImportCompletionSuggestionsRequest.create = function create(properties) {
+                            return new ImportCompletionSuggestionsRequest(properties);
                         };
     
                         /**
-                         * Encodes the specified ImportSuggestionDenyListEntriesRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.verify|verify} messages.
+                         * Encodes the specified ImportCompletionSuggestionsRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesRequest} message ImportSuggestionDenyListEntriesRequest message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IImportCompletionSuggestionsRequest} message ImportCompletionSuggestionsRequest message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        ImportSuggestionDenyListEntriesRequest.encode = function encode(message, writer) {
+                        ImportCompletionSuggestionsRequest.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
                             if (message.parent != null && Object.hasOwnProperty.call(message, "parent"))
                                 writer.uint32(/* id 1, wireType 2 =*/10).string(message.parent);
                             if (message.inlineSource != null && Object.hasOwnProperty.call(message, "inlineSource"))
-                                $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource.encode(message.inlineSource, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                                $root.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource.encode(message.inlineSource, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
                             if (message.gcsSource != null && Object.hasOwnProperty.call(message, "gcsSource"))
                                 $root.google.cloud.discoveryengine.v1.GcsSource.encode(message.gcsSource, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
+                            if (message.bigquerySource != null && Object.hasOwnProperty.call(message, "bigquerySource"))
+                                $root.google.cloud.discoveryengine.v1.BigQuerySource.encode(message.bigquerySource, writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
+                            if (message.errorConfig != null && Object.hasOwnProperty.call(message, "errorConfig"))
+                                $root.google.cloud.discoveryengine.v1.ImportErrorConfig.encode(message.errorConfig, writer.uint32(/* id 5, wireType 2 =*/42).fork()).ldelim();
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified ImportSuggestionDenyListEntriesRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.verify|verify} messages.
+                         * Encodes the specified ImportCompletionSuggestionsRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesRequest} message ImportSuggestionDenyListEntriesRequest message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IImportCompletionSuggestionsRequest} message ImportCompletionSuggestionsRequest message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        ImportSuggestionDenyListEntriesRequest.encodeDelimited = function encodeDelimited(message, writer) {
+                        ImportCompletionSuggestionsRequest.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes an ImportSuggestionDenyListEntriesRequest message from the specified reader or buffer.
+                         * Decodes an ImportCompletionSuggestionsRequest message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest} ImportSuggestionDenyListEntriesRequest
+                         * @returns {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest} ImportCompletionSuggestionsRequest
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        ImportSuggestionDenyListEntriesRequest.decode = function decode(reader, length) {
+                        ImportCompletionSuggestionsRequest.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 2: {
-                                        message.inlineSource = $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource.decode(reader, reader.uint32());
+                                        message.inlineSource = $root.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource.decode(reader, reader.uint32());
                                         break;
                                     }
                                 case 3: {
                                         message.gcsSource = $root.google.cloud.discoveryengine.v1.GcsSource.decode(reader, reader.uint32());
                                         break;
                                     }
+                                case 4: {
+                                        message.bigquerySource = $root.google.cloud.discoveryengine.v1.BigQuerySource.decode(reader, reader.uint32());
+                                        break;
+                                    }
                                 case 1: {
                                         message.parent = reader.string();
                                         break;
                                     }
+                                case 5: {
+                                        message.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.decode(reader, reader.uint32());
+                                        break;
+                                    }
                                 default:
                                     reader.skipType(tag & 7);
                                     break;
@@ -13153,37 +16234,37 @@
                         };
     
                         /**
-                         * Decodes an ImportSuggestionDenyListEntriesRequest message from the specified reader or buffer, length delimited.
+                         * Decodes an ImportCompletionSuggestionsRequest message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest} ImportSuggestionDenyListEntriesRequest
+                         * @returns {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest} ImportCompletionSuggestionsRequest
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        ImportSuggestionDenyListEntriesRequest.decodeDelimited = function decodeDelimited(reader) {
+                        ImportCompletionSuggestionsRequest.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies an ImportSuggestionDenyListEntriesRequest message.
+                         * Verifies an ImportCompletionSuggestionsRequest message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        ImportSuggestionDenyListEntriesRequest.verify = function verify(message) {
+                        ImportCompletionSuggestionsRequest.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
                             var properties = {};
                             if (message.inlineSource != null && message.hasOwnProperty("inlineSource")) {
                                 properties.source = 1;
                                 {
-                                    var error = $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource.verify(message.inlineSource);
+                                    var error = $root.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource.verify(message.inlineSource);
                                     if (error)
                                         return "inlineSource." + error;
                                 }
@@ -13198,58 +16279,85 @@
                                         return "gcsSource." + error;
                                 }
                             }
+                            if (message.bigquerySource != null && message.hasOwnProperty("bigquerySource")) {
+                                if (properties.source === 1)
+                                    return "source: multiple values";
+                                properties.source = 1;
+                                {
+                                    var error = $root.google.cloud.discoveryengine.v1.BigQuerySource.verify(message.bigquerySource);
+                                    if (error)
+                                        return "bigquerySource." + error;
+                                }
+                            }
                             if (message.parent != null && message.hasOwnProperty("parent"))
                                 if (!$util.isString(message.parent))
                                     return "parent: string expected";
+                            if (message.errorConfig != null && message.hasOwnProperty("errorConfig")) {
+                                var error = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.verify(message.errorConfig);
+                                if (error)
+                                    return "errorConfig." + error;
+                            }
                             return null;
                         };
     
                         /**
-                         * Creates an ImportSuggestionDenyListEntriesRequest message from a plain object. Also converts values to their respective internal types.
+                         * Creates an ImportCompletionSuggestionsRequest message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest} ImportSuggestionDenyListEntriesRequest
+                         * @returns {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest} ImportCompletionSuggestionsRequest
                          */
-                        ImportSuggestionDenyListEntriesRequest.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest)
+                        ImportCompletionSuggestionsRequest.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest();
+                            var message = new $root.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest();
                             if (object.inlineSource != null) {
                                 if (typeof object.inlineSource !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.inlineSource: object expected");
-                                message.inlineSource = $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource.fromObject(object.inlineSource);
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.inlineSource: object expected");
+                                message.inlineSource = $root.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource.fromObject(object.inlineSource);
                             }
                             if (object.gcsSource != null) {
                                 if (typeof object.gcsSource !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.gcsSource: object expected");
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.gcsSource: object expected");
                                 message.gcsSource = $root.google.cloud.discoveryengine.v1.GcsSource.fromObject(object.gcsSource);
                             }
+                            if (object.bigquerySource != null) {
+                                if (typeof object.bigquerySource !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.bigquerySource: object expected");
+                                message.bigquerySource = $root.google.cloud.discoveryengine.v1.BigQuerySource.fromObject(object.bigquerySource);
+                            }
                             if (object.parent != null)
                                 message.parent = String(object.parent);
+                            if (object.errorConfig != null) {
+                                if (typeof object.errorConfig !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.errorConfig: object expected");
+                                message.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.fromObject(object.errorConfig);
+                            }
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from an ImportSuggestionDenyListEntriesRequest message. Also converts values to other types if specified.
+                         * Creates a plain object from an ImportCompletionSuggestionsRequest message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest} message ImportSuggestionDenyListEntriesRequest
+                         * @param {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest} message ImportCompletionSuggestionsRequest
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        ImportSuggestionDenyListEntriesRequest.toObject = function toObject(message, options) {
+                        ImportCompletionSuggestionsRequest.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
-                            if (options.defaults)
+                            if (options.defaults) {
                                 object.parent = "";
+                                object.errorConfig = null;
+                            }
                             if (message.parent != null && message.hasOwnProperty("parent"))
                                 object.parent = message.parent;
                             if (message.inlineSource != null && message.hasOwnProperty("inlineSource")) {
-                                object.inlineSource = $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource.toObject(message.inlineSource, options);
+                                object.inlineSource = $root.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource.toObject(message.inlineSource, options);
                                 if (options.oneofs)
                                     object.source = "inlineSource";
                             }
@@ -13258,54 +16366,61 @@
                                 if (options.oneofs)
                                     object.source = "gcsSource";
                             }
+                            if (message.bigquerySource != null && message.hasOwnProperty("bigquerySource")) {
+                                object.bigquerySource = $root.google.cloud.discoveryengine.v1.BigQuerySource.toObject(message.bigquerySource, options);
+                                if (options.oneofs)
+                                    object.source = "bigquerySource";
+                            }
+                            if (message.errorConfig != null && message.hasOwnProperty("errorConfig"))
+                                object.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.toObject(message.errorConfig, options);
                             return object;
                         };
     
                         /**
-                         * Converts this ImportSuggestionDenyListEntriesRequest to JSON.
+                         * Converts this ImportCompletionSuggestionsRequest to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        ImportSuggestionDenyListEntriesRequest.prototype.toJSON = function toJSON() {
+                        ImportCompletionSuggestionsRequest.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for ImportSuggestionDenyListEntriesRequest
+                         * Gets the default type url for ImportCompletionSuggestionsRequest
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        ImportSuggestionDenyListEntriesRequest.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        ImportCompletionSuggestionsRequest.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest";
                         };
     
-                        ImportSuggestionDenyListEntriesRequest.InlineSource = (function() {
+                        ImportCompletionSuggestionsRequest.InlineSource = (function() {
     
                             /**
                              * Properties of an InlineSource.
-                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
+                             * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest
                              * @interface IInlineSource
-                             * @property {Array.<google.cloud.discoveryengine.v1.ISuggestionDenyListEntry>|null} [entries] InlineSource entries
+                             * @property {Array.<google.cloud.discoveryengine.v1.ICompletionSuggestion>|null} [suggestions] InlineSource suggestions
                              */
     
                             /**
                              * Constructs a new InlineSource.
-                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest
+                             * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest
                              * @classdesc Represents an InlineSource.
                              * @implements IInlineSource
                              * @constructor
-                             * @param {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource=} [properties] Properties to set
+                             * @param {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.IInlineSource=} [properties] Properties to set
                              */
                             function InlineSource(properties) {
-                                this.entries = [];
+                                this.suggestions = [];
                                 if (properties)
                                     for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                         if (properties[keys[i]] != null)
@@ -13313,49 +16428,49 @@
                             }
     
                             /**
-                             * InlineSource entries.
-                             * @member {Array.<google.cloud.discoveryengine.v1.ISuggestionDenyListEntry>} entries
-                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource
+                             * InlineSource suggestions.
+                             * @member {Array.<google.cloud.discoveryengine.v1.ICompletionSuggestion>} suggestions
+                             * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource
                              * @instance
                              */
-                            InlineSource.prototype.entries = $util.emptyArray;
+                            InlineSource.prototype.suggestions = $util.emptyArray;
     
                             /**
                              * Creates a new InlineSource instance using the specified properties.
                              * @function create
-                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource
+                             * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource
                              * @static
-                             * @param {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource=} [properties] Properties to set
-                             * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource} InlineSource instance
+                             * @param {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.IInlineSource=} [properties] Properties to set
+                             * @returns {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource} InlineSource instance
                              */
                             InlineSource.create = function create(properties) {
                                 return new InlineSource(properties);
                             };
     
                             /**
-                             * Encodes the specified InlineSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource.verify|verify} messages.
+                             * Encodes the specified InlineSource message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource.verify|verify} messages.
                              * @function encode
-                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource
+                             * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource
                              * @static
-                             * @param {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource} message InlineSource message or plain object to encode
+                             * @param {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.IInlineSource} message InlineSource message or plain object to encode
                              * @param {$protobuf.Writer} [writer] Writer to encode to
                              * @returns {$protobuf.Writer} Writer
                              */
                             InlineSource.encode = function encode(message, writer) {
                                 if (!writer)
                                     writer = $Writer.create();
-                                if (message.entries != null && message.entries.length)
-                                    for (var i = 0; i < message.entries.length; ++i)
-                                        $root.google.cloud.discoveryengine.v1.SuggestionDenyListEntry.encode(message.entries[i], writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                                if (message.suggestions != null && message.suggestions.length)
+                                    for (var i = 0; i < message.suggestions.length; ++i)
+                                        $root.google.cloud.discoveryengine.v1.CompletionSuggestion.encode(message.suggestions[i], writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
                                 return writer;
                             };
     
                             /**
-                             * Encodes the specified InlineSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource.verify|verify} messages.
+                             * Encodes the specified InlineSource message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource.verify|verify} messages.
                              * @function encodeDelimited
-                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource
+                             * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource
                              * @static
-                             * @param {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.IInlineSource} message InlineSource message or plain object to encode
+                             * @param {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.IInlineSource} message InlineSource message or plain object to encode
                              * @param {$protobuf.Writer} [writer] Writer to encode to
                              * @returns {$protobuf.Writer} Writer
                              */
@@ -13366,25 +16481,25 @@
                             /**
                              * Decodes an InlineSource message from the specified reader or buffer.
                              * @function decode
-                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource
+                             * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource
                              * @static
                              * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                              * @param {number} [length] Message length if known beforehand
-                             * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource} InlineSource
+                             * @returns {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource} InlineSource
                              * @throws {Error} If the payload is not a reader or valid buffer
                              * @throws {$protobuf.util.ProtocolError} If required fields are missing
                              */
                             InlineSource.decode = function decode(reader, length) {
                                 if (!(reader instanceof $Reader))
                                     reader = $Reader.create(reader);
-                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource();
+                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource();
                                 while (reader.pos < end) {
                                     var tag = reader.uint32();
                                     switch (tag >>> 3) {
                                     case 1: {
-                                            if (!(message.entries && message.entries.length))
-                                                message.entries = [];
-                                            message.entries.push($root.google.cloud.discoveryengine.v1.SuggestionDenyListEntry.decode(reader, reader.uint32()));
+                                            if (!(message.suggestions && message.suggestions.length))
+                                                message.suggestions = [];
+                                            message.suggestions.push($root.google.cloud.discoveryengine.v1.CompletionSuggestion.decode(reader, reader.uint32()));
                                             break;
                                         }
                                     default:
@@ -13398,10 +16513,10 @@
                             /**
                              * Decodes an InlineSource message from the specified reader or buffer, length delimited.
                              * @function decodeDelimited
-                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource
+                             * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource
                              * @static
                              * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                             * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource} InlineSource
+                             * @returns {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource} InlineSource
                              * @throws {Error} If the payload is not a reader or valid buffer
                              * @throws {$protobuf.util.ProtocolError} If required fields are missing
                              */
@@ -13414,7 +16529,7 @@
                             /**
                              * Verifies an InlineSource message.
                              * @function verify
-                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource
+                             * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource
                              * @static
                              * @param {Object.<string,*>} message Plain object to verify
                              * @returns {string|null} `null` if valid, otherwise the reason why it is not
@@ -13422,13 +16537,13 @@
                             InlineSource.verify = function verify(message) {
                                 if (typeof message !== "object" || message === null)
                                     return "object expected";
-                                if (message.entries != null && message.hasOwnProperty("entries")) {
-                                    if (!Array.isArray(message.entries))
-                                        return "entries: array expected";
-                                    for (var i = 0; i < message.entries.length; ++i) {
-                                        var error = $root.google.cloud.discoveryengine.v1.SuggestionDenyListEntry.verify(message.entries[i]);
+                                if (message.suggestions != null && message.hasOwnProperty("suggestions")) {
+                                    if (!Array.isArray(message.suggestions))
+                                        return "suggestions: array expected";
+                                    for (var i = 0; i < message.suggestions.length; ++i) {
+                                        var error = $root.google.cloud.discoveryengine.v1.CompletionSuggestion.verify(message.suggestions[i]);
                                         if (error)
-                                            return "entries." + error;
+                                            return "suggestions." + error;
                                     }
                                 }
                                 return null;
@@ -13437,23 +16552,23 @@
                             /**
                              * Creates an InlineSource message from a plain object. Also converts values to their respective internal types.
                              * @function fromObject
-                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource
+                             * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource
                              * @static
                              * @param {Object.<string,*>} object Plain object
-                             * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource} InlineSource
+                             * @returns {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource} InlineSource
                              */
                             InlineSource.fromObject = function fromObject(object) {
-                                if (object instanceof $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource)
+                                if (object instanceof $root.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource)
                                     return object;
-                                var message = new $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource();
-                                if (object.entries) {
-                                    if (!Array.isArray(object.entries))
-                                        throw TypeError(".google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource.entries: array expected");
-                                    message.entries = [];
-                                    for (var i = 0; i < object.entries.length; ++i) {
-                                        if (typeof object.entries[i] !== "object")
-                                            throw TypeError(".google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource.entries: object expected");
-                                        message.entries[i] = $root.google.cloud.discoveryengine.v1.SuggestionDenyListEntry.fromObject(object.entries[i]);
+                                var message = new $root.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource();
+                                if (object.suggestions) {
+                                    if (!Array.isArray(object.suggestions))
+                                        throw TypeError(".google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource.suggestions: array expected");
+                                    message.suggestions = [];
+                                    for (var i = 0; i < object.suggestions.length; ++i) {
+                                        if (typeof object.suggestions[i] !== "object")
+                                            throw TypeError(".google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource.suggestions: object expected");
+                                        message.suggestions[i] = $root.google.cloud.discoveryengine.v1.CompletionSuggestion.fromObject(object.suggestions[i]);
                                     }
                                 }
                                 return message;
@@ -13462,9 +16577,9 @@
                             /**
                              * Creates a plain object from an InlineSource message. Also converts values to other types if specified.
                              * @function toObject
-                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource
+                             * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource
                              * @static
-                             * @param {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource} message InlineSource
+                             * @param {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource} message InlineSource
                              * @param {$protobuf.IConversionOptions} [options] Conversion options
                              * @returns {Object.<string,*>} Plain object
                              */
@@ -13473,11 +16588,11 @@
                                     options = {};
                                 var object = {};
                                 if (options.arrays || options.defaults)
-                                    object.entries = [];
-                                if (message.entries && message.entries.length) {
-                                    object.entries = [];
-                                    for (var j = 0; j < message.entries.length; ++j)
-                                        object.entries[j] = $root.google.cloud.discoveryengine.v1.SuggestionDenyListEntry.toObject(message.entries[j], options);
+                                    object.suggestions = [];
+                                if (message.suggestions && message.suggestions.length) {
+                                    object.suggestions = [];
+                                    for (var j = 0; j < message.suggestions.length; ++j)
+                                        object.suggestions[j] = $root.google.cloud.discoveryengine.v1.CompletionSuggestion.toObject(message.suggestions[j], options);
                                 }
                                 return object;
                             };
@@ -13485,7 +16600,7 @@
                             /**
                              * Converts this InlineSource to JSON.
                              * @function toJSON
-                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource
+                             * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource
                              * @instance
                              * @returns {Object.<string,*>} JSON object
                              */
@@ -13493,48 +16608,301 @@
                                 return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                             };
     
-                            /**
-                             * Gets the default type url for InlineSource
-                             * @function getTypeUrl
-                             * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource
-                             * @static
-                             * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                             * @returns {string} The default type url
-                             */
-                            InlineSource.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
-                                if (typeUrlPrefix === undefined) {
-                                    typeUrlPrefix = "type.googleapis.com";
-                                }
-                                return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesRequest.InlineSource";
-                            };
+                            /**
+                             * Gets the default type url for InlineSource
+                             * @function getTypeUrl
+                             * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource
+                             * @static
+                             * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                             * @returns {string} The default type url
+                             */
+                            InlineSource.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                                if (typeUrlPrefix === undefined) {
+                                    typeUrlPrefix = "type.googleapis.com";
+                                }
+                                return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource";
+                            };
+    
+                            return InlineSource;
+                        })();
+    
+                        return ImportCompletionSuggestionsRequest;
+                    })();
+    
+                    v1.ImportCompletionSuggestionsResponse = (function() {
+    
+                        /**
+                         * Properties of an ImportCompletionSuggestionsResponse.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @interface IImportCompletionSuggestionsResponse
+                         * @property {Array.<google.rpc.IStatus>|null} [errorSamples] ImportCompletionSuggestionsResponse errorSamples
+                         * @property {google.cloud.discoveryengine.v1.IImportErrorConfig|null} [errorConfig] ImportCompletionSuggestionsResponse errorConfig
+                         */
+    
+                        /**
+                         * Constructs a new ImportCompletionSuggestionsResponse.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @classdesc Represents an ImportCompletionSuggestionsResponse.
+                         * @implements IImportCompletionSuggestionsResponse
+                         * @constructor
+                         * @param {google.cloud.discoveryengine.v1.IImportCompletionSuggestionsResponse=} [properties] Properties to set
+                         */
+                        function ImportCompletionSuggestionsResponse(properties) {
+                            this.errorSamples = [];
+                            if (properties)
+                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                    if (properties[keys[i]] != null)
+                                        this[keys[i]] = properties[keys[i]];
+                        }
+    
+                        /**
+                         * ImportCompletionSuggestionsResponse errorSamples.
+                         * @member {Array.<google.rpc.IStatus>} errorSamples
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse
+                         * @instance
+                         */
+                        ImportCompletionSuggestionsResponse.prototype.errorSamples = $util.emptyArray;
+    
+                        /**
+                         * ImportCompletionSuggestionsResponse errorConfig.
+                         * @member {google.cloud.discoveryengine.v1.IImportErrorConfig|null|undefined} errorConfig
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse
+                         * @instance
+                         */
+                        ImportCompletionSuggestionsResponse.prototype.errorConfig = null;
+    
+                        /**
+                         * Creates a new ImportCompletionSuggestionsResponse instance using the specified properties.
+                         * @function create
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.IImportCompletionSuggestionsResponse=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse} ImportCompletionSuggestionsResponse instance
+                         */
+                        ImportCompletionSuggestionsResponse.create = function create(properties) {
+                            return new ImportCompletionSuggestionsResponse(properties);
+                        };
+    
+                        /**
+                         * Encodes the specified ImportCompletionSuggestionsResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse.verify|verify} messages.
+                         * @function encode
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.IImportCompletionSuggestionsResponse} message ImportCompletionSuggestionsResponse message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        ImportCompletionSuggestionsResponse.encode = function encode(message, writer) {
+                            if (!writer)
+                                writer = $Writer.create();
+                            if (message.errorSamples != null && message.errorSamples.length)
+                                for (var i = 0; i < message.errorSamples.length; ++i)
+                                    $root.google.rpc.Status.encode(message.errorSamples[i], writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                            if (message.errorConfig != null && Object.hasOwnProperty.call(message, "errorConfig"))
+                                $root.google.cloud.discoveryengine.v1.ImportErrorConfig.encode(message.errorConfig, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                            return writer;
+                        };
+    
+                        /**
+                         * Encodes the specified ImportCompletionSuggestionsResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse.verify|verify} messages.
+                         * @function encodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.IImportCompletionSuggestionsResponse} message ImportCompletionSuggestionsResponse message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        ImportCompletionSuggestionsResponse.encodeDelimited = function encodeDelimited(message, writer) {
+                            return this.encode(message, writer).ldelim();
+                        };
+    
+                        /**
+                         * Decodes an ImportCompletionSuggestionsResponse message from the specified reader or buffer.
+                         * @function decode
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @param {number} [length] Message length if known beforehand
+                         * @returns {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse} ImportCompletionSuggestionsResponse
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        ImportCompletionSuggestionsResponse.decode = function decode(reader, length) {
+                            if (!(reader instanceof $Reader))
+                                reader = $Reader.create(reader);
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse();
+                            while (reader.pos < end) {
+                                var tag = reader.uint32();
+                                switch (tag >>> 3) {
+                                case 1: {
+                                        if (!(message.errorSamples && message.errorSamples.length))
+                                            message.errorSamples = [];
+                                        message.errorSamples.push($root.google.rpc.Status.decode(reader, reader.uint32()));
+                                        break;
+                                    }
+                                case 2: {
+                                        message.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                default:
+                                    reader.skipType(tag & 7);
+                                    break;
+                                }
+                            }
+                            return message;
+                        };
+    
+                        /**
+                         * Decodes an ImportCompletionSuggestionsResponse message from the specified reader or buffer, length delimited.
+                         * @function decodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @returns {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse} ImportCompletionSuggestionsResponse
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        ImportCompletionSuggestionsResponse.decodeDelimited = function decodeDelimited(reader) {
+                            if (!(reader instanceof $Reader))
+                                reader = new $Reader(reader);
+                            return this.decode(reader, reader.uint32());
+                        };
+    
+                        /**
+                         * Verifies an ImportCompletionSuggestionsResponse message.
+                         * @function verify
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse
+                         * @static
+                         * @param {Object.<string,*>} message Plain object to verify
+                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                         */
+                        ImportCompletionSuggestionsResponse.verify = function verify(message) {
+                            if (typeof message !== "object" || message === null)
+                                return "object expected";
+                            if (message.errorSamples != null && message.hasOwnProperty("errorSamples")) {
+                                if (!Array.isArray(message.errorSamples))
+                                    return "errorSamples: array expected";
+                                for (var i = 0; i < message.errorSamples.length; ++i) {
+                                    var error = $root.google.rpc.Status.verify(message.errorSamples[i]);
+                                    if (error)
+                                        return "errorSamples." + error;
+                                }
+                            }
+                            if (message.errorConfig != null && message.hasOwnProperty("errorConfig")) {
+                                var error = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.verify(message.errorConfig);
+                                if (error)
+                                    return "errorConfig." + error;
+                            }
+                            return null;
+                        };
+    
+                        /**
+                         * Creates an ImportCompletionSuggestionsResponse message from a plain object. Also converts values to their respective internal types.
+                         * @function fromObject
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse
+                         * @static
+                         * @param {Object.<string,*>} object Plain object
+                         * @returns {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse} ImportCompletionSuggestionsResponse
+                         */
+                        ImportCompletionSuggestionsResponse.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse)
+                                return object;
+                            var message = new $root.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse();
+                            if (object.errorSamples) {
+                                if (!Array.isArray(object.errorSamples))
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse.errorSamples: array expected");
+                                message.errorSamples = [];
+                                for (var i = 0; i < object.errorSamples.length; ++i) {
+                                    if (typeof object.errorSamples[i] !== "object")
+                                        throw TypeError(".google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse.errorSamples: object expected");
+                                    message.errorSamples[i] = $root.google.rpc.Status.fromObject(object.errorSamples[i]);
+                                }
+                            }
+                            if (object.errorConfig != null) {
+                                if (typeof object.errorConfig !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse.errorConfig: object expected");
+                                message.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.fromObject(object.errorConfig);
+                            }
+                            return message;
+                        };
+    
+                        /**
+                         * Creates a plain object from an ImportCompletionSuggestionsResponse message. Also converts values to other types if specified.
+                         * @function toObject
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse} message ImportCompletionSuggestionsResponse
+                         * @param {$protobuf.IConversionOptions} [options] Conversion options
+                         * @returns {Object.<string,*>} Plain object
+                         */
+                        ImportCompletionSuggestionsResponse.toObject = function toObject(message, options) {
+                            if (!options)
+                                options = {};
+                            var object = {};
+                            if (options.arrays || options.defaults)
+                                object.errorSamples = [];
+                            if (options.defaults)
+                                object.errorConfig = null;
+                            if (message.errorSamples && message.errorSamples.length) {
+                                object.errorSamples = [];
+                                for (var j = 0; j < message.errorSamples.length; ++j)
+                                    object.errorSamples[j] = $root.google.rpc.Status.toObject(message.errorSamples[j], options);
+                            }
+                            if (message.errorConfig != null && message.hasOwnProperty("errorConfig"))
+                                object.errorConfig = $root.google.cloud.discoveryengine.v1.ImportErrorConfig.toObject(message.errorConfig, options);
+                            return object;
+                        };
+    
+                        /**
+                         * Converts this ImportCompletionSuggestionsResponse to JSON.
+                         * @function toJSON
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse
+                         * @instance
+                         * @returns {Object.<string,*>} JSON object
+                         */
+                        ImportCompletionSuggestionsResponse.prototype.toJSON = function toJSON() {
+                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                        };
     
-                            return InlineSource;
-                        })();
+                        /**
+                         * Gets the default type url for ImportCompletionSuggestionsResponse
+                         * @function getTypeUrl
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse
+                         * @static
+                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns {string} The default type url
+                         */
+                        ImportCompletionSuggestionsResponse.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                            if (typeUrlPrefix === undefined) {
+                                typeUrlPrefix = "type.googleapis.com";
+                            }
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse";
+                        };
     
-                        return ImportSuggestionDenyListEntriesRequest;
+                        return ImportCompletionSuggestionsResponse;
                     })();
     
-                    v1.ImportSuggestionDenyListEntriesResponse = (function() {
+                    v1.ImportCompletionSuggestionsMetadata = (function() {
     
                         /**
-                         * Properties of an ImportSuggestionDenyListEntriesResponse.
+                         * Properties of an ImportCompletionSuggestionsMetadata.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IImportSuggestionDenyListEntriesResponse
-                         * @property {Array.<google.rpc.IStatus>|null} [errorSamples] ImportSuggestionDenyListEntriesResponse errorSamples
-                         * @property {number|Long|null} [importedEntriesCount] ImportSuggestionDenyListEntriesResponse importedEntriesCount
-                         * @property {number|Long|null} [failedEntriesCount] ImportSuggestionDenyListEntriesResponse failedEntriesCount
+                         * @interface IImportCompletionSuggestionsMetadata
+                         * @property {google.protobuf.ITimestamp|null} [createTime] ImportCompletionSuggestionsMetadata createTime
+                         * @property {google.protobuf.ITimestamp|null} [updateTime] ImportCompletionSuggestionsMetadata updateTime
+                         * @property {number|Long|null} [successCount] ImportCompletionSuggestionsMetadata successCount
+                         * @property {number|Long|null} [failureCount] ImportCompletionSuggestionsMetadata failureCount
                          */
     
                         /**
-                         * Constructs a new ImportSuggestionDenyListEntriesResponse.
+                         * Constructs a new ImportCompletionSuggestionsMetadata.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents an ImportSuggestionDenyListEntriesResponse.
-                         * @implements IImportSuggestionDenyListEntriesResponse
+                         * @classdesc Represents an ImportCompletionSuggestionsMetadata.
+                         * @implements IImportCompletionSuggestionsMetadata
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesResponse=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IImportCompletionSuggestionsMetadata=} [properties] Properties to set
                          */
-                        function ImportSuggestionDenyListEntriesResponse(properties) {
-                            this.errorSamples = [];
+                        function ImportCompletionSuggestionsMetadata(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -13542,106 +16910,117 @@
                         }
     
                         /**
-                         * ImportSuggestionDenyListEntriesResponse errorSamples.
-                         * @member {Array.<google.rpc.IStatus>} errorSamples
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
+                         * ImportCompletionSuggestionsMetadata createTime.
+                         * @member {google.protobuf.ITimestamp|null|undefined} createTime
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata
                          * @instance
                          */
-                        ImportSuggestionDenyListEntriesResponse.prototype.errorSamples = $util.emptyArray;
+                        ImportCompletionSuggestionsMetadata.prototype.createTime = null;
     
                         /**
-                         * ImportSuggestionDenyListEntriesResponse importedEntriesCount.
-                         * @member {number|Long} importedEntriesCount
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
+                         * ImportCompletionSuggestionsMetadata updateTime.
+                         * @member {google.protobuf.ITimestamp|null|undefined} updateTime
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata
                          * @instance
                          */
-                        ImportSuggestionDenyListEntriesResponse.prototype.importedEntriesCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
+                        ImportCompletionSuggestionsMetadata.prototype.updateTime = null;
     
                         /**
-                         * ImportSuggestionDenyListEntriesResponse failedEntriesCount.
-                         * @member {number|Long} failedEntriesCount
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
+                         * ImportCompletionSuggestionsMetadata successCount.
+                         * @member {number|Long} successCount
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata
                          * @instance
                          */
-                        ImportSuggestionDenyListEntriesResponse.prototype.failedEntriesCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
+                        ImportCompletionSuggestionsMetadata.prototype.successCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
     
                         /**
-                         * Creates a new ImportSuggestionDenyListEntriesResponse instance using the specified properties.
+                         * ImportCompletionSuggestionsMetadata failureCount.
+                         * @member {number|Long} failureCount
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata
+                         * @instance
+                         */
+                        ImportCompletionSuggestionsMetadata.prototype.failureCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
+    
+                        /**
+                         * Creates a new ImportCompletionSuggestionsMetadata instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesResponse=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse} ImportSuggestionDenyListEntriesResponse instance
+                         * @param {google.cloud.discoveryengine.v1.IImportCompletionSuggestionsMetadata=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata} ImportCompletionSuggestionsMetadata instance
                          */
-                        ImportSuggestionDenyListEntriesResponse.create = function create(properties) {
-                            return new ImportSuggestionDenyListEntriesResponse(properties);
+                        ImportCompletionSuggestionsMetadata.create = function create(properties) {
+                            return new ImportCompletionSuggestionsMetadata(properties);
                         };
     
                         /**
-                         * Encodes the specified ImportSuggestionDenyListEntriesResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse.verify|verify} messages.
+                         * Encodes the specified ImportCompletionSuggestionsMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesResponse} message ImportSuggestionDenyListEntriesResponse message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IImportCompletionSuggestionsMetadata} message ImportCompletionSuggestionsMetadata message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        ImportSuggestionDenyListEntriesResponse.encode = function encode(message, writer) {
+                        ImportCompletionSuggestionsMetadata.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.errorSamples != null && message.errorSamples.length)
-                                for (var i = 0; i < message.errorSamples.length; ++i)
-                                    $root.google.rpc.Status.encode(message.errorSamples[i], writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
-                            if (message.importedEntriesCount != null && Object.hasOwnProperty.call(message, "importedEntriesCount"))
-                                writer.uint32(/* id 2, wireType 0 =*/16).int64(message.importedEntriesCount);
-                            if (message.failedEntriesCount != null && Object.hasOwnProperty.call(message, "failedEntriesCount"))
-                                writer.uint32(/* id 3, wireType 0 =*/24).int64(message.failedEntriesCount);
+                            if (message.createTime != null && Object.hasOwnProperty.call(message, "createTime"))
+                                $root.google.protobuf.Timestamp.encode(message.createTime, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                            if (message.updateTime != null && Object.hasOwnProperty.call(message, "updateTime"))
+                                $root.google.protobuf.Timestamp.encode(message.updateTime, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                            if (message.successCount != null && Object.hasOwnProperty.call(message, "successCount"))
+                                writer.uint32(/* id 3, wireType 0 =*/24).int64(message.successCount);
+                            if (message.failureCount != null && Object.hasOwnProperty.call(message, "failureCount"))
+                                writer.uint32(/* id 4, wireType 0 =*/32).int64(message.failureCount);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified ImportSuggestionDenyListEntriesResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse.verify|verify} messages.
+                         * Encodes the specified ImportCompletionSuggestionsMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesResponse} message ImportSuggestionDenyListEntriesResponse message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IImportCompletionSuggestionsMetadata} message ImportCompletionSuggestionsMetadata message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        ImportSuggestionDenyListEntriesResponse.encodeDelimited = function encodeDelimited(message, writer) {
+                        ImportCompletionSuggestionsMetadata.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes an ImportSuggestionDenyListEntriesResponse message from the specified reader or buffer.
+                         * Decodes an ImportCompletionSuggestionsMetadata message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse} ImportSuggestionDenyListEntriesResponse
+                         * @returns {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata} ImportCompletionSuggestionsMetadata
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        ImportSuggestionDenyListEntriesResponse.decode = function decode(reader, length) {
+                        ImportCompletionSuggestionsMetadata.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 1: {
-                                        if (!(message.errorSamples && message.errorSamples.length))
-                                            message.errorSamples = [];
-                                        message.errorSamples.push($root.google.rpc.Status.decode(reader, reader.uint32()));
+                                        message.createTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
                                         break;
                                     }
                                 case 2: {
-                                        message.importedEntriesCount = reader.int64();
+                                        message.updateTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
                                         break;
                                     }
                                 case 3: {
-                                        message.failedEntriesCount = reader.int64();
+                                        message.successCount = reader.int64();
+                                        break;
+                                    }
+                                case 4: {
+                                        message.failureCount = reader.int64();
                                         break;
                                     }
                                 default:
@@ -13653,186 +17032,193 @@
                         };
     
                         /**
-                         * Decodes an ImportSuggestionDenyListEntriesResponse message from the specified reader or buffer, length delimited.
+                         * Decodes an ImportCompletionSuggestionsMetadata message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse} ImportSuggestionDenyListEntriesResponse
+                         * @returns {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata} ImportCompletionSuggestionsMetadata
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        ImportSuggestionDenyListEntriesResponse.decodeDelimited = function decodeDelimited(reader) {
+                        ImportCompletionSuggestionsMetadata.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies an ImportSuggestionDenyListEntriesResponse message.
+                         * Verifies an ImportCompletionSuggestionsMetadata message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        ImportSuggestionDenyListEntriesResponse.verify = function verify(message) {
+                        ImportCompletionSuggestionsMetadata.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            if (message.errorSamples != null && message.hasOwnProperty("errorSamples")) {
-                                if (!Array.isArray(message.errorSamples))
-                                    return "errorSamples: array expected";
-                                for (var i = 0; i < message.errorSamples.length; ++i) {
-                                    var error = $root.google.rpc.Status.verify(message.errorSamples[i]);
-                                    if (error)
-                                        return "errorSamples." + error;
-                                }
+                            if (message.createTime != null && message.hasOwnProperty("createTime")) {
+                                var error = $root.google.protobuf.Timestamp.verify(message.createTime);
+                                if (error)
+                                    return "createTime." + error;
                             }
-                            if (message.importedEntriesCount != null && message.hasOwnProperty("importedEntriesCount"))
-                                if (!$util.isInteger(message.importedEntriesCount) && !(message.importedEntriesCount && $util.isInteger(message.importedEntriesCount.low) && $util.isInteger(message.importedEntriesCount.high)))
-                                    return "importedEntriesCount: integer|Long expected";
-                            if (message.failedEntriesCount != null && message.hasOwnProperty("failedEntriesCount"))
-                                if (!$util.isInteger(message.failedEntriesCount) && !(message.failedEntriesCount && $util.isInteger(message.failedEntriesCount.low) && $util.isInteger(message.failedEntriesCount.high)))
-                                    return "failedEntriesCount: integer|Long expected";
+                            if (message.updateTime != null && message.hasOwnProperty("updateTime")) {
+                                var error = $root.google.protobuf.Timestamp.verify(message.updateTime);
+                                if (error)
+                                    return "updateTime." + error;
+                            }
+                            if (message.successCount != null && message.hasOwnProperty("successCount"))
+                                if (!$util.isInteger(message.successCount) && !(message.successCount && $util.isInteger(message.successCount.low) && $util.isInteger(message.successCount.high)))
+                                    return "successCount: integer|Long expected";
+                            if (message.failureCount != null && message.hasOwnProperty("failureCount"))
+                                if (!$util.isInteger(message.failureCount) && !(message.failureCount && $util.isInteger(message.failureCount.low) && $util.isInteger(message.failureCount.high)))
+                                    return "failureCount: integer|Long expected";
                             return null;
                         };
     
                         /**
-                         * Creates an ImportSuggestionDenyListEntriesResponse message from a plain object. Also converts values to their respective internal types.
+                         * Creates an ImportCompletionSuggestionsMetadata message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse} ImportSuggestionDenyListEntriesResponse
+                         * @returns {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata} ImportCompletionSuggestionsMetadata
                          */
-                        ImportSuggestionDenyListEntriesResponse.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse)
+                        ImportCompletionSuggestionsMetadata.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse();
-                            if (object.errorSamples) {
-                                if (!Array.isArray(object.errorSamples))
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse.errorSamples: array expected");
-                                message.errorSamples = [];
-                                for (var i = 0; i < object.errorSamples.length; ++i) {
-                                    if (typeof object.errorSamples[i] !== "object")
-                                        throw TypeError(".google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse.errorSamples: object expected");
-                                    message.errorSamples[i] = $root.google.rpc.Status.fromObject(object.errorSamples[i]);
-                                }
+                            var message = new $root.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata();
+                            if (object.createTime != null) {
+                                if (typeof object.createTime !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata.createTime: object expected");
+                                message.createTime = $root.google.protobuf.Timestamp.fromObject(object.createTime);
                             }
-                            if (object.importedEntriesCount != null)
+                            if (object.updateTime != null) {
+                                if (typeof object.updateTime !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata.updateTime: object expected");
+                                message.updateTime = $root.google.protobuf.Timestamp.fromObject(object.updateTime);
+                            }
+                            if (object.successCount != null)
                                 if ($util.Long)
-                                    (message.importedEntriesCount = $util.Long.fromValue(object.importedEntriesCount)).unsigned = false;
-                                else if (typeof object.importedEntriesCount === "string")
-                                    message.importedEntriesCount = parseInt(object.importedEntriesCount, 10);
-                                else if (typeof object.importedEntriesCount === "number")
-                                    message.importedEntriesCount = object.importedEntriesCount;
-                                else if (typeof object.importedEntriesCount === "object")
-                                    message.importedEntriesCount = new $util.LongBits(object.importedEntriesCount.low >>> 0, object.importedEntriesCount.high >>> 0).toNumber();
-                            if (object.failedEntriesCount != null)
+                                    (message.successCount = $util.Long.fromValue(object.successCount)).unsigned = false;
+                                else if (typeof object.successCount === "string")
+                                    message.successCount = parseInt(object.successCount, 10);
+                                else if (typeof object.successCount === "number")
+                                    message.successCount = object.successCount;
+                                else if (typeof object.successCount === "object")
+                                    message.successCount = new $util.LongBits(object.successCount.low >>> 0, object.successCount.high >>> 0).toNumber();
+                            if (object.failureCount != null)
                                 if ($util.Long)
-                                    (message.failedEntriesCount = $util.Long.fromValue(object.failedEntriesCount)).unsigned = false;
-                                else if (typeof object.failedEntriesCount === "string")
-                                    message.failedEntriesCount = parseInt(object.failedEntriesCount, 10);
-                                else if (typeof object.failedEntriesCount === "number")
-                                    message.failedEntriesCount = object.failedEntriesCount;
-                                else if (typeof object.failedEntriesCount === "object")
-                                    message.failedEntriesCount = new $util.LongBits(object.failedEntriesCount.low >>> 0, object.failedEntriesCount.high >>> 0).toNumber();
+                                    (message.failureCount = $util.Long.fromValue(object.failureCount)).unsigned = false;
+                                else if (typeof object.failureCount === "string")
+                                    message.failureCount = parseInt(object.failureCount, 10);
+                                else if (typeof object.failureCount === "number")
+                                    message.failureCount = object.failureCount;
+                                else if (typeof object.failureCount === "object")
+                                    message.failureCount = new $util.LongBits(object.failureCount.low >>> 0, object.failureCount.high >>> 0).toNumber();
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from an ImportSuggestionDenyListEntriesResponse message. Also converts values to other types if specified.
+                         * Creates a plain object from an ImportCompletionSuggestionsMetadata message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse} message ImportSuggestionDenyListEntriesResponse
+                         * @param {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata} message ImportCompletionSuggestionsMetadata
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        ImportSuggestionDenyListEntriesResponse.toObject = function toObject(message, options) {
+                        ImportCompletionSuggestionsMetadata.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
-                            if (options.arrays || options.defaults)
-                                object.errorSamples = [];
                             if (options.defaults) {
+                                object.createTime = null;
+                                object.updateTime = null;
                                 if ($util.Long) {
                                     var long = new $util.Long(0, 0, false);
-                                    object.importedEntriesCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
+                                    object.successCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
                                 } else
-                                    object.importedEntriesCount = options.longs === String ? "0" : 0;
+                                    object.successCount = options.longs === String ? "0" : 0;
                                 if ($util.Long) {
                                     var long = new $util.Long(0, 0, false);
-                                    object.failedEntriesCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
+                                    object.failureCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
                                 } else
-                                    object.failedEntriesCount = options.longs === String ? "0" : 0;
-                            }
-                            if (message.errorSamples && message.errorSamples.length) {
-                                object.errorSamples = [];
-                                for (var j = 0; j < message.errorSamples.length; ++j)
-                                    object.errorSamples[j] = $root.google.rpc.Status.toObject(message.errorSamples[j], options);
+                                    object.failureCount = options.longs === String ? "0" : 0;
                             }
-                            if (message.importedEntriesCount != null && message.hasOwnProperty("importedEntriesCount"))
-                                if (typeof message.importedEntriesCount === "number")
-                                    object.importedEntriesCount = options.longs === String ? String(message.importedEntriesCount) : message.importedEntriesCount;
+                            if (message.createTime != null && message.hasOwnProperty("createTime"))
+                                object.createTime = $root.google.protobuf.Timestamp.toObject(message.createTime, options);
+                            if (message.updateTime != null && message.hasOwnProperty("updateTime"))
+                                object.updateTime = $root.google.protobuf.Timestamp.toObject(message.updateTime, options);
+                            if (message.successCount != null && message.hasOwnProperty("successCount"))
+                                if (typeof message.successCount === "number")
+                                    object.successCount = options.longs === String ? String(message.successCount) : message.successCount;
                                 else
-                                    object.importedEntriesCount = options.longs === String ? $util.Long.prototype.toString.call(message.importedEntriesCount) : options.longs === Number ? new $util.LongBits(message.importedEntriesCount.low >>> 0, message.importedEntriesCount.high >>> 0).toNumber() : message.importedEntriesCount;
-                            if (message.failedEntriesCount != null && message.hasOwnProperty("failedEntriesCount"))
-                                if (typeof message.failedEntriesCount === "number")
-                                    object.failedEntriesCount = options.longs === String ? String(message.failedEntriesCount) : message.failedEntriesCount;
+                                    object.successCount = options.longs === String ? $util.Long.prototype.toString.call(message.successCount) : options.longs === Number ? new $util.LongBits(message.successCount.low >>> 0, message.successCount.high >>> 0).toNumber() : message.successCount;
+                            if (message.failureCount != null && message.hasOwnProperty("failureCount"))
+                                if (typeof message.failureCount === "number")
+                                    object.failureCount = options.longs === String ? String(message.failureCount) : message.failureCount;
                                 else
-                                    object.failedEntriesCount = options.longs === String ? $util.Long.prototype.toString.call(message.failedEntriesCount) : options.longs === Number ? new $util.LongBits(message.failedEntriesCount.low >>> 0, message.failedEntriesCount.high >>> 0).toNumber() : message.failedEntriesCount;
+                                    object.failureCount = options.longs === String ? $util.Long.prototype.toString.call(message.failureCount) : options.longs === Number ? new $util.LongBits(message.failureCount.low >>> 0, message.failureCount.high >>> 0).toNumber() : message.failureCount;
                             return object;
                         };
     
                         /**
-                         * Converts this ImportSuggestionDenyListEntriesResponse to JSON.
+                         * Converts this ImportCompletionSuggestionsMetadata to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        ImportSuggestionDenyListEntriesResponse.prototype.toJSON = function toJSON() {
+                        ImportCompletionSuggestionsMetadata.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for ImportSuggestionDenyListEntriesResponse
+                         * Gets the default type url for ImportCompletionSuggestionsMetadata
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse
+                         * @memberof google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        ImportSuggestionDenyListEntriesResponse.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        ImportCompletionSuggestionsMetadata.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesResponse";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata";
                         };
     
-                        return ImportSuggestionDenyListEntriesResponse;
+                        return ImportCompletionSuggestionsMetadata;
                     })();
     
-                    v1.ImportSuggestionDenyListEntriesMetadata = (function() {
+                    v1.Document = (function() {
     
                         /**
-                         * Properties of an ImportSuggestionDenyListEntriesMetadata.
+                         * Properties of a Document.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IImportSuggestionDenyListEntriesMetadata
-                         * @property {google.protobuf.ITimestamp|null} [createTime] ImportSuggestionDenyListEntriesMetadata createTime
-                         * @property {google.protobuf.ITimestamp|null} [updateTime] ImportSuggestionDenyListEntriesMetadata updateTime
+                         * @interface IDocument
+                         * @property {google.protobuf.IStruct|null} [structData] Document structData
+                         * @property {string|null} [jsonData] Document jsonData
+                         * @property {string|null} [name] Document name
+                         * @property {string|null} [id] Document id
+                         * @property {string|null} [schemaId] Document schemaId
+                         * @property {google.cloud.discoveryengine.v1.Document.IContent|null} [content] Document content
+                         * @property {string|null} [parentDocumentId] Document parentDocumentId
+                         * @property {google.protobuf.IStruct|null} [derivedStructData] Document derivedStructData
+                         * @property {google.protobuf.ITimestamp|null} [indexTime] Document indexTime
                          */
     
                         /**
-                         * Constructs a new ImportSuggestionDenyListEntriesMetadata.
+                         * Constructs a new Document.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents an ImportSuggestionDenyListEntriesMetadata.
-                         * @implements IImportSuggestionDenyListEntriesMetadata
+                         * @classdesc Represents a Document.
+                         * @implements IDocument
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesMetadata=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IDocument=} [properties] Properties to set
                          */
-                        function ImportSuggestionDenyListEntriesMetadata(properties) {
+                        function Document(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -13840,89 +17226,201 @@
                         }
     
                         /**
-                         * ImportSuggestionDenyListEntriesMetadata createTime.
-                         * @member {google.protobuf.ITimestamp|null|undefined} createTime
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
+                         * Document structData.
+                         * @member {google.protobuf.IStruct|null|undefined} structData
+                         * @memberof google.cloud.discoveryengine.v1.Document
                          * @instance
                          */
-                        ImportSuggestionDenyListEntriesMetadata.prototype.createTime = null;
+                        Document.prototype.structData = null;
     
                         /**
-                         * ImportSuggestionDenyListEntriesMetadata updateTime.
-                         * @member {google.protobuf.ITimestamp|null|undefined} updateTime
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
+                         * Document jsonData.
+                         * @member {string|null|undefined} jsonData
+                         * @memberof google.cloud.discoveryengine.v1.Document
                          * @instance
                          */
-                        ImportSuggestionDenyListEntriesMetadata.prototype.updateTime = null;
+                        Document.prototype.jsonData = null;
     
                         /**
-                         * Creates a new ImportSuggestionDenyListEntriesMetadata instance using the specified properties.
+                         * Document name.
+                         * @member {string} name
+                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * @instance
+                         */
+                        Document.prototype.name = "";
+    
+                        /**
+                         * Document id.
+                         * @member {string} id
+                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * @instance
+                         */
+                        Document.prototype.id = "";
+    
+                        /**
+                         * Document schemaId.
+                         * @member {string} schemaId
+                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * @instance
+                         */
+                        Document.prototype.schemaId = "";
+    
+                        /**
+                         * Document content.
+                         * @member {google.cloud.discoveryengine.v1.Document.IContent|null|undefined} content
+                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * @instance
+                         */
+                        Document.prototype.content = null;
+    
+                        /**
+                         * Document parentDocumentId.
+                         * @member {string} parentDocumentId
+                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * @instance
+                         */
+                        Document.prototype.parentDocumentId = "";
+    
+                        /**
+                         * Document derivedStructData.
+                         * @member {google.protobuf.IStruct|null|undefined} derivedStructData
+                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * @instance
+                         */
+                        Document.prototype.derivedStructData = null;
+    
+                        /**
+                         * Document indexTime.
+                         * @member {google.protobuf.ITimestamp|null|undefined} indexTime
+                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * @instance
+                         */
+                        Document.prototype.indexTime = null;
+    
+                        // OneOf field names bound to virtual getters and setters
+                        var $oneOfFields;
+    
+                        /**
+                         * Document data.
+                         * @member {"structData"|"jsonData"|undefined} data
+                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * @instance
+                         */
+                        Object.defineProperty(Document.prototype, "data", {
+                            get: $util.oneOfGetter($oneOfFields = ["structData", "jsonData"]),
+                            set: $util.oneOfSetter($oneOfFields)
+                        });
+    
+                        /**
+                         * Creates a new Document instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
+                         * @memberof google.cloud.discoveryengine.v1.Document
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesMetadata=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata} ImportSuggestionDenyListEntriesMetadata instance
+                         * @param {google.cloud.discoveryengine.v1.IDocument=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.Document} Document instance
                          */
-                        ImportSuggestionDenyListEntriesMetadata.create = function create(properties) {
-                            return new ImportSuggestionDenyListEntriesMetadata(properties);
+                        Document.create = function create(properties) {
+                            return new Document(properties);
                         };
     
                         /**
-                         * Encodes the specified ImportSuggestionDenyListEntriesMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata.verify|verify} messages.
+                         * Encodes the specified Document message. Does not implicitly {@link google.cloud.discoveryengine.v1.Document.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
+                         * @memberof google.cloud.discoveryengine.v1.Document
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesMetadata} message ImportSuggestionDenyListEntriesMetadata message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IDocument} message Document message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        ImportSuggestionDenyListEntriesMetadata.encode = function encode(message, writer) {
+                        Document.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.createTime != null && Object.hasOwnProperty.call(message, "createTime"))
-                                $root.google.protobuf.Timestamp.encode(message.createTime, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
-                            if (message.updateTime != null && Object.hasOwnProperty.call(message, "updateTime"))
-                                $root.google.protobuf.Timestamp.encode(message.updateTime, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                            if (message.name != null && Object.hasOwnProperty.call(message, "name"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.name);
+                            if (message.id != null && Object.hasOwnProperty.call(message, "id"))
+                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.id);
+                            if (message.schemaId != null && Object.hasOwnProperty.call(message, "schemaId"))
+                                writer.uint32(/* id 3, wireType 2 =*/26).string(message.schemaId);
+                            if (message.structData != null && Object.hasOwnProperty.call(message, "structData"))
+                                $root.google.protobuf.Struct.encode(message.structData, writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
+                            if (message.jsonData != null && Object.hasOwnProperty.call(message, "jsonData"))
+                                writer.uint32(/* id 5, wireType 2 =*/42).string(message.jsonData);
+                            if (message.derivedStructData != null && Object.hasOwnProperty.call(message, "derivedStructData"))
+                                $root.google.protobuf.Struct.encode(message.derivedStructData, writer.uint32(/* id 6, wireType 2 =*/50).fork()).ldelim();
+                            if (message.parentDocumentId != null && Object.hasOwnProperty.call(message, "parentDocumentId"))
+                                writer.uint32(/* id 7, wireType 2 =*/58).string(message.parentDocumentId);
+                            if (message.content != null && Object.hasOwnProperty.call(message, "content"))
+                                $root.google.cloud.discoveryengine.v1.Document.Content.encode(message.content, writer.uint32(/* id 10, wireType 2 =*/82).fork()).ldelim();
+                            if (message.indexTime != null && Object.hasOwnProperty.call(message, "indexTime"))
+                                $root.google.protobuf.Timestamp.encode(message.indexTime, writer.uint32(/* id 13, wireType 2 =*/106).fork()).ldelim();
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified ImportSuggestionDenyListEntriesMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata.verify|verify} messages.
+                         * Encodes the specified Document message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.Document.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
+                         * @memberof google.cloud.discoveryengine.v1.Document
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IImportSuggestionDenyListEntriesMetadata} message ImportSuggestionDenyListEntriesMetadata message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IDocument} message Document message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        ImportSuggestionDenyListEntriesMetadata.encodeDelimited = function encodeDelimited(message, writer) {
+                        Document.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes an ImportSuggestionDenyListEntriesMetadata message from the specified reader or buffer.
+                         * Decodes a Document message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
+                         * @memberof google.cloud.discoveryengine.v1.Document
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata} ImportSuggestionDenyListEntriesMetadata
+                         * @returns {google.cloud.discoveryengine.v1.Document} Document
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        ImportSuggestionDenyListEntriesMetadata.decode = function decode(reader, length) {
+                        Document.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.Document();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
+                                case 4: {
+                                        message.structData = $root.google.protobuf.Struct.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 5: {
+                                        message.jsonData = reader.string();
+                                        break;
+                                    }
                                 case 1: {
-                                        message.createTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
+                                        message.name = reader.string();
                                         break;
                                     }
                                 case 2: {
-                                        message.updateTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
+                                        message.id = reader.string();
+                                        break;
+                                    }
+                                case 3: {
+                                        message.schemaId = reader.string();
+                                        break;
+                                    }
+                                case 10: {
+                                        message.content = $root.google.cloud.discoveryengine.v1.Document.Content.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 7: {
+                                        message.parentDocumentId = reader.string();
+                                        break;
+                                    }
+                                case 6: {
+                                        message.derivedStructData = $root.google.protobuf.Struct.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 13: {
+                                        message.indexTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
                                         break;
                                     }
                                 default:
@@ -13934,149 +17432,519 @@
                         };
     
                         /**
-                         * Decodes an ImportSuggestionDenyListEntriesMetadata message from the specified reader or buffer, length delimited.
+                         * Decodes a Document message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
+                         * @memberof google.cloud.discoveryengine.v1.Document
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata} ImportSuggestionDenyListEntriesMetadata
+                         * @returns {google.cloud.discoveryengine.v1.Document} Document
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        ImportSuggestionDenyListEntriesMetadata.decodeDelimited = function decodeDelimited(reader) {
+                        Document.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies an ImportSuggestionDenyListEntriesMetadata message.
+                         * Verifies a Document message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
+                         * @memberof google.cloud.discoveryengine.v1.Document
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        ImportSuggestionDenyListEntriesMetadata.verify = function verify(message) {
+                        Document.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            if (message.createTime != null && message.hasOwnProperty("createTime")) {
-                                var error = $root.google.protobuf.Timestamp.verify(message.createTime);
+                            var properties = {};
+                            if (message.structData != null && message.hasOwnProperty("structData")) {
+                                properties.data = 1;
+                                {
+                                    var error = $root.google.protobuf.Struct.verify(message.structData);
+                                    if (error)
+                                        return "structData." + error;
+                                }
+                            }
+                            if (message.jsonData != null && message.hasOwnProperty("jsonData")) {
+                                if (properties.data === 1)
+                                    return "data: multiple values";
+                                properties.data = 1;
+                                if (!$util.isString(message.jsonData))
+                                    return "jsonData: string expected";
+                            }
+                            if (message.name != null && message.hasOwnProperty("name"))
+                                if (!$util.isString(message.name))
+                                    return "name: string expected";
+                            if (message.id != null && message.hasOwnProperty("id"))
+                                if (!$util.isString(message.id))
+                                    return "id: string expected";
+                            if (message.schemaId != null && message.hasOwnProperty("schemaId"))
+                                if (!$util.isString(message.schemaId))
+                                    return "schemaId: string expected";
+                            if (message.content != null && message.hasOwnProperty("content")) {
+                                var error = $root.google.cloud.discoveryengine.v1.Document.Content.verify(message.content);
                                 if (error)
-                                    return "createTime." + error;
+                                    return "content." + error;
                             }
-                            if (message.updateTime != null && message.hasOwnProperty("updateTime")) {
-                                var error = $root.google.protobuf.Timestamp.verify(message.updateTime);
+                            if (message.parentDocumentId != null && message.hasOwnProperty("parentDocumentId"))
+                                if (!$util.isString(message.parentDocumentId))
+                                    return "parentDocumentId: string expected";
+                            if (message.derivedStructData != null && message.hasOwnProperty("derivedStructData")) {
+                                var error = $root.google.protobuf.Struct.verify(message.derivedStructData);
+                                if (error)
+                                    return "derivedStructData." + error;
+                            }
+                            if (message.indexTime != null && message.hasOwnProperty("indexTime")) {
+                                var error = $root.google.protobuf.Timestamp.verify(message.indexTime);
                                 if (error)
-                                    return "updateTime." + error;
+                                    return "indexTime." + error;
                             }
                             return null;
                         };
     
                         /**
-                         * Creates an ImportSuggestionDenyListEntriesMetadata message from a plain object. Also converts values to their respective internal types.
+                         * Creates a Document message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
+                         * @memberof google.cloud.discoveryengine.v1.Document
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata} ImportSuggestionDenyListEntriesMetadata
+                         * @returns {google.cloud.discoveryengine.v1.Document} Document
                          */
-                        ImportSuggestionDenyListEntriesMetadata.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata)
+                        Document.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.Document)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata();
-                            if (object.createTime != null) {
-                                if (typeof object.createTime !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata.createTime: object expected");
-                                message.createTime = $root.google.protobuf.Timestamp.fromObject(object.createTime);
+                            var message = new $root.google.cloud.discoveryengine.v1.Document();
+                            if (object.structData != null) {
+                                if (typeof object.structData !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.Document.structData: object expected");
+                                message.structData = $root.google.protobuf.Struct.fromObject(object.structData);
                             }
-                            if (object.updateTime != null) {
-                                if (typeof object.updateTime !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata.updateTime: object expected");
-                                message.updateTime = $root.google.protobuf.Timestamp.fromObject(object.updateTime);
+                            if (object.jsonData != null)
+                                message.jsonData = String(object.jsonData);
+                            if (object.name != null)
+                                message.name = String(object.name);
+                            if (object.id != null)
+                                message.id = String(object.id);
+                            if (object.schemaId != null)
+                                message.schemaId = String(object.schemaId);
+                            if (object.content != null) {
+                                if (typeof object.content !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.Document.content: object expected");
+                                message.content = $root.google.cloud.discoveryengine.v1.Document.Content.fromObject(object.content);
+                            }
+                            if (object.parentDocumentId != null)
+                                message.parentDocumentId = String(object.parentDocumentId);
+                            if (object.derivedStructData != null) {
+                                if (typeof object.derivedStructData !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.Document.derivedStructData: object expected");
+                                message.derivedStructData = $root.google.protobuf.Struct.fromObject(object.derivedStructData);
+                            }
+                            if (object.indexTime != null) {
+                                if (typeof object.indexTime !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.Document.indexTime: object expected");
+                                message.indexTime = $root.google.protobuf.Timestamp.fromObject(object.indexTime);
                             }
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from an ImportSuggestionDenyListEntriesMetadata message. Also converts values to other types if specified.
+                         * Creates a plain object from a Document message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
+                         * @memberof google.cloud.discoveryengine.v1.Document
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata} message ImportSuggestionDenyListEntriesMetadata
+                         * @param {google.cloud.discoveryengine.v1.Document} message Document
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        ImportSuggestionDenyListEntriesMetadata.toObject = function toObject(message, options) {
+                        Document.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
                             if (options.defaults) {
-                                object.createTime = null;
-                                object.updateTime = null;
+                                object.name = "";
+                                object.id = "";
+                                object.schemaId = "";
+                                object.derivedStructData = null;
+                                object.parentDocumentId = "";
+                                object.content = null;
+                                object.indexTime = null;
                             }
-                            if (message.createTime != null && message.hasOwnProperty("createTime"))
-                                object.createTime = $root.google.protobuf.Timestamp.toObject(message.createTime, options);
-                            if (message.updateTime != null && message.hasOwnProperty("updateTime"))
-                                object.updateTime = $root.google.protobuf.Timestamp.toObject(message.updateTime, options);
+                            if (message.name != null && message.hasOwnProperty("name"))
+                                object.name = message.name;
+                            if (message.id != null && message.hasOwnProperty("id"))
+                                object.id = message.id;
+                            if (message.schemaId != null && message.hasOwnProperty("schemaId"))
+                                object.schemaId = message.schemaId;
+                            if (message.structData != null && message.hasOwnProperty("structData")) {
+                                object.structData = $root.google.protobuf.Struct.toObject(message.structData, options);
+                                if (options.oneofs)
+                                    object.data = "structData";
+                            }
+                            if (message.jsonData != null && message.hasOwnProperty("jsonData")) {
+                                object.jsonData = message.jsonData;
+                                if (options.oneofs)
+                                    object.data = "jsonData";
+                            }
+                            if (message.derivedStructData != null && message.hasOwnProperty("derivedStructData"))
+                                object.derivedStructData = $root.google.protobuf.Struct.toObject(message.derivedStructData, options);
+                            if (message.parentDocumentId != null && message.hasOwnProperty("parentDocumentId"))
+                                object.parentDocumentId = message.parentDocumentId;
+                            if (message.content != null && message.hasOwnProperty("content"))
+                                object.content = $root.google.cloud.discoveryengine.v1.Document.Content.toObject(message.content, options);
+                            if (message.indexTime != null && message.hasOwnProperty("indexTime"))
+                                object.indexTime = $root.google.protobuf.Timestamp.toObject(message.indexTime, options);
                             return object;
                         };
     
                         /**
-                         * Converts this ImportSuggestionDenyListEntriesMetadata to JSON.
+                         * Converts this Document to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
+                         * @memberof google.cloud.discoveryengine.v1.Document
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        ImportSuggestionDenyListEntriesMetadata.prototype.toJSON = function toJSON() {
+                        Document.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for ImportSuggestionDenyListEntriesMetadata
+                         * Gets the default type url for Document
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata
+                         * @memberof google.cloud.discoveryengine.v1.Document
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        ImportSuggestionDenyListEntriesMetadata.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        Document.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.ImportSuggestionDenyListEntriesMetadata";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.Document";
                         };
     
-                        return ImportSuggestionDenyListEntriesMetadata;
+                        Document.Content = (function() {
+    
+                            /**
+                             * Properties of a Content.
+                             * @memberof google.cloud.discoveryengine.v1.Document
+                             * @interface IContent
+                             * @property {Uint8Array|null} [rawBytes] Content rawBytes
+                             * @property {string|null} [uri] Content uri
+                             * @property {string|null} [mimeType] Content mimeType
+                             */
+    
+                            /**
+                             * Constructs a new Content.
+                             * @memberof google.cloud.discoveryengine.v1.Document
+                             * @classdesc Represents a Content.
+                             * @implements IContent
+                             * @constructor
+                             * @param {google.cloud.discoveryengine.v1.Document.IContent=} [properties] Properties to set
+                             */
+                            function Content(properties) {
+                                if (properties)
+                                    for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                        if (properties[keys[i]] != null)
+                                            this[keys[i]] = properties[keys[i]];
+                            }
+    
+                            /**
+                             * Content rawBytes.
+                             * @member {Uint8Array|null|undefined} rawBytes
+                             * @memberof google.cloud.discoveryengine.v1.Document.Content
+                             * @instance
+                             */
+                            Content.prototype.rawBytes = null;
+    
+                            /**
+                             * Content uri.
+                             * @member {string|null|undefined} uri
+                             * @memberof google.cloud.discoveryengine.v1.Document.Content
+                             * @instance
+                             */
+                            Content.prototype.uri = null;
+    
+                            /**
+                             * Content mimeType.
+                             * @member {string} mimeType
+                             * @memberof google.cloud.discoveryengine.v1.Document.Content
+                             * @instance
+                             */
+                            Content.prototype.mimeType = "";
+    
+                            // OneOf field names bound to virtual getters and setters
+                            var $oneOfFields;
+    
+                            /**
+                             * Content content.
+                             * @member {"rawBytes"|"uri"|undefined} content
+                             * @memberof google.cloud.discoveryengine.v1.Document.Content
+                             * @instance
+                             */
+                            Object.defineProperty(Content.prototype, "content", {
+                                get: $util.oneOfGetter($oneOfFields = ["rawBytes", "uri"]),
+                                set: $util.oneOfSetter($oneOfFields)
+                            });
+    
+                            /**
+                             * Creates a new Content instance using the specified properties.
+                             * @function create
+                             * @memberof google.cloud.discoveryengine.v1.Document.Content
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.Document.IContent=} [properties] Properties to set
+                             * @returns {google.cloud.discoveryengine.v1.Document.Content} Content instance
+                             */
+                            Content.create = function create(properties) {
+                                return new Content(properties);
+                            };
+    
+                            /**
+                             * Encodes the specified Content message. Does not implicitly {@link google.cloud.discoveryengine.v1.Document.Content.verify|verify} messages.
+                             * @function encode
+                             * @memberof google.cloud.discoveryengine.v1.Document.Content
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.Document.IContent} message Content message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            Content.encode = function encode(message, writer) {
+                                if (!writer)
+                                    writer = $Writer.create();
+                                if (message.mimeType != null && Object.hasOwnProperty.call(message, "mimeType"))
+                                    writer.uint32(/* id 1, wireType 2 =*/10).string(message.mimeType);
+                                if (message.rawBytes != null && Object.hasOwnProperty.call(message, "rawBytes"))
+                                    writer.uint32(/* id 2, wireType 2 =*/18).bytes(message.rawBytes);
+                                if (message.uri != null && Object.hasOwnProperty.call(message, "uri"))
+                                    writer.uint32(/* id 3, wireType 2 =*/26).string(message.uri);
+                                return writer;
+                            };
+    
+                            /**
+                             * Encodes the specified Content message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.Document.Content.verify|verify} messages.
+                             * @function encodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.Document.Content
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.Document.IContent} message Content message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            Content.encodeDelimited = function encodeDelimited(message, writer) {
+                                return this.encode(message, writer).ldelim();
+                            };
+    
+                            /**
+                             * Decodes a Content message from the specified reader or buffer.
+                             * @function decode
+                             * @memberof google.cloud.discoveryengine.v1.Document.Content
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @param {number} [length] Message length if known beforehand
+                             * @returns {google.cloud.discoveryengine.v1.Document.Content} Content
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            Content.decode = function decode(reader, length) {
+                                if (!(reader instanceof $Reader))
+                                    reader = $Reader.create(reader);
+                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.Document.Content();
+                                while (reader.pos < end) {
+                                    var tag = reader.uint32();
+                                    switch (tag >>> 3) {
+                                    case 2: {
+                                            message.rawBytes = reader.bytes();
+                                            break;
+                                        }
+                                    case 3: {
+                                            message.uri = reader.string();
+                                            break;
+                                        }
+                                    case 1: {
+                                            message.mimeType = reader.string();
+                                            break;
+                                        }
+                                    default:
+                                        reader.skipType(tag & 7);
+                                        break;
+                                    }
+                                }
+                                return message;
+                            };
+    
+                            /**
+                             * Decodes a Content message from the specified reader or buffer, length delimited.
+                             * @function decodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.Document.Content
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @returns {google.cloud.discoveryengine.v1.Document.Content} Content
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            Content.decodeDelimited = function decodeDelimited(reader) {
+                                if (!(reader instanceof $Reader))
+                                    reader = new $Reader(reader);
+                                return this.decode(reader, reader.uint32());
+                            };
+    
+                            /**
+                             * Verifies a Content message.
+                             * @function verify
+                             * @memberof google.cloud.discoveryengine.v1.Document.Content
+                             * @static
+                             * @param {Object.<string,*>} message Plain object to verify
+                             * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                             */
+                            Content.verify = function verify(message) {
+                                if (typeof message !== "object" || message === null)
+                                    return "object expected";
+                                var properties = {};
+                                if (message.rawBytes != null && message.hasOwnProperty("rawBytes")) {
+                                    properties.content = 1;
+                                    if (!(message.rawBytes && typeof message.rawBytes.length === "number" || $util.isString(message.rawBytes)))
+                                        return "rawBytes: buffer expected";
+                                }
+                                if (message.uri != null && message.hasOwnProperty("uri")) {
+                                    if (properties.content === 1)
+                                        return "content: multiple values";
+                                    properties.content = 1;
+                                    if (!$util.isString(message.uri))
+                                        return "uri: string expected";
+                                }
+                                if (message.mimeType != null && message.hasOwnProperty("mimeType"))
+                                    if (!$util.isString(message.mimeType))
+                                        return "mimeType: string expected";
+                                return null;
+                            };
+    
+                            /**
+                             * Creates a Content message from a plain object. Also converts values to their respective internal types.
+                             * @function fromObject
+                             * @memberof google.cloud.discoveryengine.v1.Document.Content
+                             * @static
+                             * @param {Object.<string,*>} object Plain object
+                             * @returns {google.cloud.discoveryengine.v1.Document.Content} Content
+                             */
+                            Content.fromObject = function fromObject(object) {
+                                if (object instanceof $root.google.cloud.discoveryengine.v1.Document.Content)
+                                    return object;
+                                var message = new $root.google.cloud.discoveryengine.v1.Document.Content();
+                                if (object.rawBytes != null)
+                                    if (typeof object.rawBytes === "string")
+                                        $util.base64.decode(object.rawBytes, message.rawBytes = $util.newBuffer($util.base64.length(object.rawBytes)), 0);
+                                    else if (object.rawBytes.length >= 0)
+                                        message.rawBytes = object.rawBytes;
+                                if (object.uri != null)
+                                    message.uri = String(object.uri);
+                                if (object.mimeType != null)
+                                    message.mimeType = String(object.mimeType);
+                                return message;
+                            };
+    
+                            /**
+                             * Creates a plain object from a Content message. Also converts values to other types if specified.
+                             * @function toObject
+                             * @memberof google.cloud.discoveryengine.v1.Document.Content
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.Document.Content} message Content
+                             * @param {$protobuf.IConversionOptions} [options] Conversion options
+                             * @returns {Object.<string,*>} Plain object
+                             */
+                            Content.toObject = function toObject(message, options) {
+                                if (!options)
+                                    options = {};
+                                var object = {};
+                                if (options.defaults)
+                                    object.mimeType = "";
+                                if (message.mimeType != null && message.hasOwnProperty("mimeType"))
+                                    object.mimeType = message.mimeType;
+                                if (message.rawBytes != null && message.hasOwnProperty("rawBytes")) {
+                                    object.rawBytes = options.bytes === String ? $util.base64.encode(message.rawBytes, 0, message.rawBytes.length) : options.bytes === Array ? Array.prototype.slice.call(message.rawBytes) : message.rawBytes;
+                                    if (options.oneofs)
+                                        object.content = "rawBytes";
+                                }
+                                if (message.uri != null && message.hasOwnProperty("uri")) {
+                                    object.uri = message.uri;
+                                    if (options.oneofs)
+                                        object.content = "uri";
+                                }
+                                return object;
+                            };
+    
+                            /**
+                             * Converts this Content to JSON.
+                             * @function toJSON
+                             * @memberof google.cloud.discoveryengine.v1.Document.Content
+                             * @instance
+                             * @returns {Object.<string,*>} JSON object
+                             */
+                            Content.prototype.toJSON = function toJSON() {
+                                return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                            };
+    
+                            /**
+                             * Gets the default type url for Content
+                             * @function getTypeUrl
+                             * @memberof google.cloud.discoveryengine.v1.Document.Content
+                             * @static
+                             * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                             * @returns {string} The default type url
+                             */
+                            Content.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                                if (typeUrlPrefix === undefined) {
+                                    typeUrlPrefix = "type.googleapis.com";
+                                }
+                                return typeUrlPrefix + "/google.cloud.discoveryengine.v1.Document.Content";
+                            };
+    
+                            return Content;
+                        })();
+    
+                        return Document;
                     })();
     
-                    v1.Document = (function() {
+                    v1.UserEvent = (function() {
     
                         /**
-                         * Properties of a Document.
+                         * Properties of a UserEvent.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IDocument
-                         * @property {google.protobuf.IStruct|null} [structData] Document structData
-                         * @property {string|null} [jsonData] Document jsonData
-                         * @property {string|null} [name] Document name
-                         * @property {string|null} [id] Document id
-                         * @property {string|null} [schemaId] Document schemaId
-                         * @property {google.cloud.discoveryengine.v1.Document.IContent|null} [content] Document content
-                         * @property {string|null} [parentDocumentId] Document parentDocumentId
-                         * @property {google.protobuf.IStruct|null} [derivedStructData] Document derivedStructData
-                         * @property {google.protobuf.ITimestamp|null} [indexTime] Document indexTime
+                         * @interface IUserEvent
+                         * @property {string|null} [eventType] UserEvent eventType
+                         * @property {string|null} [userPseudoId] UserEvent userPseudoId
+                         * @property {string|null} [engine] UserEvent engine
+                         * @property {string|null} [dataStore] UserEvent dataStore
+                         * @property {google.protobuf.ITimestamp|null} [eventTime] UserEvent eventTime
+                         * @property {google.cloud.discoveryengine.v1.IUserInfo|null} [userInfo] UserEvent userInfo
+                         * @property {boolean|null} [directUserRequest] UserEvent directUserRequest
+                         * @property {string|null} [sessionId] UserEvent sessionId
+                         * @property {google.cloud.discoveryengine.v1.IPageInfo|null} [pageInfo] UserEvent pageInfo
+                         * @property {string|null} [attributionToken] UserEvent attributionToken
+                         * @property {string|null} [filter] UserEvent filter
+                         * @property {Array.<google.cloud.discoveryengine.v1.IDocumentInfo>|null} [documents] UserEvent documents
+                         * @property {google.cloud.discoveryengine.v1.IPanelInfo|null} [panel] UserEvent panel
+                         * @property {google.cloud.discoveryengine.v1.ISearchInfo|null} [searchInfo] UserEvent searchInfo
+                         * @property {google.cloud.discoveryengine.v1.ICompletionInfo|null} [completionInfo] UserEvent completionInfo
+                         * @property {google.cloud.discoveryengine.v1.ITransactionInfo|null} [transactionInfo] UserEvent transactionInfo
+                         * @property {Array.<string>|null} [tagIds] UserEvent tagIds
+                         * @property {Array.<string>|null} [promotionIds] UserEvent promotionIds
+                         * @property {Object.<string,google.cloud.discoveryengine.v1.ICustomAttribute>|null} [attributes] UserEvent attributes
+                         * @property {google.cloud.discoveryengine.v1.IMediaInfo|null} [mediaInfo] UserEvent mediaInfo
                          */
     
                         /**
-                         * Constructs a new Document.
+                         * Constructs a new UserEvent.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a Document.
-                         * @implements IDocument
+                         * @classdesc Represents a UserEvent.
+                         * @implements IUserEvent
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IDocument=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IUserEvent=} [properties] Properties to set
                          */
-                        function Document(properties) {
+                        function UserEvent(properties) {
+                            this.documents = [];
+                            this.tagIds = [];
+                            this.promotionIds = [];
+                            this.attributes = {};
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -14084,201 +17952,372 @@
                         }
     
                         /**
-                         * Document structData.
-                         * @member {google.protobuf.IStruct|null|undefined} structData
-                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * UserEvent eventType.
+                         * @member {string} eventType
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * @instance
+                         */
+                        UserEvent.prototype.eventType = "";
+    
+                        /**
+                         * UserEvent userPseudoId.
+                         * @member {string} userPseudoId
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * @instance
+                         */
+                        UserEvent.prototype.userPseudoId = "";
+    
+                        /**
+                         * UserEvent engine.
+                         * @member {string} engine
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * @instance
+                         */
+                        UserEvent.prototype.engine = "";
+    
+                        /**
+                         * UserEvent dataStore.
+                         * @member {string} dataStore
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * @instance
+                         */
+                        UserEvent.prototype.dataStore = "";
+    
+                        /**
+                         * UserEvent eventTime.
+                         * @member {google.protobuf.ITimestamp|null|undefined} eventTime
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * @instance
+                         */
+                        UserEvent.prototype.eventTime = null;
+    
+                        /**
+                         * UserEvent userInfo.
+                         * @member {google.cloud.discoveryengine.v1.IUserInfo|null|undefined} userInfo
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * @instance
+                         */
+                        UserEvent.prototype.userInfo = null;
+    
+                        /**
+                         * UserEvent directUserRequest.
+                         * @member {boolean} directUserRequest
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * @instance
+                         */
+                        UserEvent.prototype.directUserRequest = false;
+    
+                        /**
+                         * UserEvent sessionId.
+                         * @member {string} sessionId
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * @instance
+                         */
+                        UserEvent.prototype.sessionId = "";
+    
+                        /**
+                         * UserEvent pageInfo.
+                         * @member {google.cloud.discoveryengine.v1.IPageInfo|null|undefined} pageInfo
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * @instance
+                         */
+                        UserEvent.prototype.pageInfo = null;
+    
+                        /**
+                         * UserEvent attributionToken.
+                         * @member {string} attributionToken
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
                          * @instance
                          */
-                        Document.prototype.structData = null;
+                        UserEvent.prototype.attributionToken = "";
     
                         /**
-                         * Document jsonData.
-                         * @member {string|null|undefined} jsonData
-                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * UserEvent filter.
+                         * @member {string} filter
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
                          * @instance
                          */
-                        Document.prototype.jsonData = null;
+                        UserEvent.prototype.filter = "";
     
                         /**
-                         * Document name.
-                         * @member {string} name
-                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * UserEvent documents.
+                         * @member {Array.<google.cloud.discoveryengine.v1.IDocumentInfo>} documents
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
                          * @instance
                          */
-                        Document.prototype.name = "";
+                        UserEvent.prototype.documents = $util.emptyArray;
     
                         /**
-                         * Document id.
-                         * @member {string} id
-                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * UserEvent panel.
+                         * @member {google.cloud.discoveryengine.v1.IPanelInfo|null|undefined} panel
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
                          * @instance
                          */
-                        Document.prototype.id = "";
+                        UserEvent.prototype.panel = null;
     
                         /**
-                         * Document schemaId.
-                         * @member {string} schemaId
-                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * UserEvent searchInfo.
+                         * @member {google.cloud.discoveryengine.v1.ISearchInfo|null|undefined} searchInfo
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
                          * @instance
                          */
-                        Document.prototype.schemaId = "";
+                        UserEvent.prototype.searchInfo = null;
     
                         /**
-                         * Document content.
-                         * @member {google.cloud.discoveryengine.v1.Document.IContent|null|undefined} content
-                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * UserEvent completionInfo.
+                         * @member {google.cloud.discoveryengine.v1.ICompletionInfo|null|undefined} completionInfo
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
                          * @instance
                          */
-                        Document.prototype.content = null;
+                        UserEvent.prototype.completionInfo = null;
     
                         /**
-                         * Document parentDocumentId.
-                         * @member {string} parentDocumentId
-                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * UserEvent transactionInfo.
+                         * @member {google.cloud.discoveryengine.v1.ITransactionInfo|null|undefined} transactionInfo
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
                          * @instance
                          */
-                        Document.prototype.parentDocumentId = "";
+                        UserEvent.prototype.transactionInfo = null;
     
                         /**
-                         * Document derivedStructData.
-                         * @member {google.protobuf.IStruct|null|undefined} derivedStructData
-                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * UserEvent tagIds.
+                         * @member {Array.<string>} tagIds
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
                          * @instance
                          */
-                        Document.prototype.derivedStructData = null;
+                        UserEvent.prototype.tagIds = $util.emptyArray;
     
                         /**
-                         * Document indexTime.
-                         * @member {google.protobuf.ITimestamp|null|undefined} indexTime
-                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * UserEvent promotionIds.
+                         * @member {Array.<string>} promotionIds
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
                          * @instance
                          */
-                        Document.prototype.indexTime = null;
+                        UserEvent.prototype.promotionIds = $util.emptyArray;
     
-                        // OneOf field names bound to virtual getters and setters
-                        var $oneOfFields;
+                        /**
+                         * UserEvent attributes.
+                         * @member {Object.<string,google.cloud.discoveryengine.v1.ICustomAttribute>} attributes
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * @instance
+                         */
+                        UserEvent.prototype.attributes = $util.emptyObject;
     
                         /**
-                         * Document data.
-                         * @member {"structData"|"jsonData"|undefined} data
-                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * UserEvent mediaInfo.
+                         * @member {google.cloud.discoveryengine.v1.IMediaInfo|null|undefined} mediaInfo
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
                          * @instance
                          */
-                        Object.defineProperty(Document.prototype, "data", {
-                            get: $util.oneOfGetter($oneOfFields = ["structData", "jsonData"]),
-                            set: $util.oneOfSetter($oneOfFields)
-                        });
+                        UserEvent.prototype.mediaInfo = null;
     
                         /**
-                         * Creates a new Document instance using the specified properties.
+                         * Creates a new UserEvent instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IDocument=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.Document} Document instance
+                         * @param {google.cloud.discoveryengine.v1.IUserEvent=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.UserEvent} UserEvent instance
                          */
-                        Document.create = function create(properties) {
-                            return new Document(properties);
+                        UserEvent.create = function create(properties) {
+                            return new UserEvent(properties);
                         };
     
                         /**
-                         * Encodes the specified Document message. Does not implicitly {@link google.cloud.discoveryengine.v1.Document.verify|verify} messages.
+                         * Encodes the specified UserEvent message. Does not implicitly {@link google.cloud.discoveryengine.v1.UserEvent.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IDocument} message Document message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IUserEvent} message UserEvent message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        Document.encode = function encode(message, writer) {
+                        UserEvent.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.name != null && Object.hasOwnProperty.call(message, "name"))
-                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.name);
-                            if (message.id != null && Object.hasOwnProperty.call(message, "id"))
-                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.id);
-                            if (message.schemaId != null && Object.hasOwnProperty.call(message, "schemaId"))
-                                writer.uint32(/* id 3, wireType 2 =*/26).string(message.schemaId);
-                            if (message.structData != null && Object.hasOwnProperty.call(message, "structData"))
-                                $root.google.protobuf.Struct.encode(message.structData, writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
-                            if (message.jsonData != null && Object.hasOwnProperty.call(message, "jsonData"))
-                                writer.uint32(/* id 5, wireType 2 =*/42).string(message.jsonData);
-                            if (message.derivedStructData != null && Object.hasOwnProperty.call(message, "derivedStructData"))
-                                $root.google.protobuf.Struct.encode(message.derivedStructData, writer.uint32(/* id 6, wireType 2 =*/50).fork()).ldelim();
-                            if (message.parentDocumentId != null && Object.hasOwnProperty.call(message, "parentDocumentId"))
-                                writer.uint32(/* id 7, wireType 2 =*/58).string(message.parentDocumentId);
-                            if (message.content != null && Object.hasOwnProperty.call(message, "content"))
-                                $root.google.cloud.discoveryengine.v1.Document.Content.encode(message.content, writer.uint32(/* id 10, wireType 2 =*/82).fork()).ldelim();
-                            if (message.indexTime != null && Object.hasOwnProperty.call(message, "indexTime"))
-                                $root.google.protobuf.Timestamp.encode(message.indexTime, writer.uint32(/* id 13, wireType 2 =*/106).fork()).ldelim();
+                            if (message.eventType != null && Object.hasOwnProperty.call(message, "eventType"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.eventType);
+                            if (message.userPseudoId != null && Object.hasOwnProperty.call(message, "userPseudoId"))
+                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.userPseudoId);
+                            if (message.eventTime != null && Object.hasOwnProperty.call(message, "eventTime"))
+                                $root.google.protobuf.Timestamp.encode(message.eventTime, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
+                            if (message.userInfo != null && Object.hasOwnProperty.call(message, "userInfo"))
+                                $root.google.cloud.discoveryengine.v1.UserInfo.encode(message.userInfo, writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
+                            if (message.directUserRequest != null && Object.hasOwnProperty.call(message, "directUserRequest"))
+                                writer.uint32(/* id 5, wireType 0 =*/40).bool(message.directUserRequest);
+                            if (message.sessionId != null && Object.hasOwnProperty.call(message, "sessionId"))
+                                writer.uint32(/* id 6, wireType 2 =*/50).string(message.sessionId);
+                            if (message.pageInfo != null && Object.hasOwnProperty.call(message, "pageInfo"))
+                                $root.google.cloud.discoveryengine.v1.PageInfo.encode(message.pageInfo, writer.uint32(/* id 7, wireType 2 =*/58).fork()).ldelim();
+                            if (message.attributionToken != null && Object.hasOwnProperty.call(message, "attributionToken"))
+                                writer.uint32(/* id 8, wireType 2 =*/66).string(message.attributionToken);
+                            if (message.filter != null && Object.hasOwnProperty.call(message, "filter"))
+                                writer.uint32(/* id 9, wireType 2 =*/74).string(message.filter);
+                            if (message.documents != null && message.documents.length)
+                                for (var i = 0; i < message.documents.length; ++i)
+                                    $root.google.cloud.discoveryengine.v1.DocumentInfo.encode(message.documents[i], writer.uint32(/* id 10, wireType 2 =*/82).fork()).ldelim();
+                            if (message.panel != null && Object.hasOwnProperty.call(message, "panel"))
+                                $root.google.cloud.discoveryengine.v1.PanelInfo.encode(message.panel, writer.uint32(/* id 11, wireType 2 =*/90).fork()).ldelim();
+                            if (message.searchInfo != null && Object.hasOwnProperty.call(message, "searchInfo"))
+                                $root.google.cloud.discoveryengine.v1.SearchInfo.encode(message.searchInfo, writer.uint32(/* id 12, wireType 2 =*/98).fork()).ldelim();
+                            if (message.completionInfo != null && Object.hasOwnProperty.call(message, "completionInfo"))
+                                $root.google.cloud.discoveryengine.v1.CompletionInfo.encode(message.completionInfo, writer.uint32(/* id 13, wireType 2 =*/106).fork()).ldelim();
+                            if (message.transactionInfo != null && Object.hasOwnProperty.call(message, "transactionInfo"))
+                                $root.google.cloud.discoveryengine.v1.TransactionInfo.encode(message.transactionInfo, writer.uint32(/* id 14, wireType 2 =*/114).fork()).ldelim();
+                            if (message.tagIds != null && message.tagIds.length)
+                                for (var i = 0; i < message.tagIds.length; ++i)
+                                    writer.uint32(/* id 15, wireType 2 =*/122).string(message.tagIds[i]);
+                            if (message.promotionIds != null && message.promotionIds.length)
+                                for (var i = 0; i < message.promotionIds.length; ++i)
+                                    writer.uint32(/* id 16, wireType 2 =*/130).string(message.promotionIds[i]);
+                            if (message.attributes != null && Object.hasOwnProperty.call(message, "attributes"))
+                                for (var keys = Object.keys(message.attributes), i = 0; i < keys.length; ++i) {
+                                    writer.uint32(/* id 17, wireType 2 =*/138).fork().uint32(/* id 1, wireType 2 =*/10).string(keys[i]);
+                                    $root.google.cloud.discoveryengine.v1.CustomAttribute.encode(message.attributes[keys[i]], writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim().ldelim();
+                                }
+                            if (message.mediaInfo != null && Object.hasOwnProperty.call(message, "mediaInfo"))
+                                $root.google.cloud.discoveryengine.v1.MediaInfo.encode(message.mediaInfo, writer.uint32(/* id 18, wireType 2 =*/146).fork()).ldelim();
+                            if (message.engine != null && Object.hasOwnProperty.call(message, "engine"))
+                                writer.uint32(/* id 19, wireType 2 =*/154).string(message.engine);
+                            if (message.dataStore != null && Object.hasOwnProperty.call(message, "dataStore"))
+                                writer.uint32(/* id 20, wireType 2 =*/162).string(message.dataStore);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified Document message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.Document.verify|verify} messages.
+                         * Encodes the specified UserEvent message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.UserEvent.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IDocument} message Document message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IUserEvent} message UserEvent message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        Document.encodeDelimited = function encodeDelimited(message, writer) {
+                        UserEvent.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a Document message from the specified reader or buffer.
+                         * Decodes a UserEvent message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.Document} Document
+                         * @returns {google.cloud.discoveryengine.v1.UserEvent} UserEvent
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        Document.decode = function decode(reader, length) {
+                        UserEvent.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.Document();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.UserEvent(), key, value;
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
+                                case 1: {
+                                        message.eventType = reader.string();
+                                        break;
+                                    }
+                                case 2: {
+                                        message.userPseudoId = reader.string();
+                                        break;
+                                    }
+                                case 19: {
+                                        message.engine = reader.string();
+                                        break;
+                                    }
+                                case 20: {
+                                        message.dataStore = reader.string();
+                                        break;
+                                    }
+                                case 3: {
+                                        message.eventTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
+                                        break;
+                                    }
                                 case 4: {
-                                        message.structData = $root.google.protobuf.Struct.decode(reader, reader.uint32());
+                                        message.userInfo = $root.google.cloud.discoveryengine.v1.UserInfo.decode(reader, reader.uint32());
                                         break;
                                     }
                                 case 5: {
-                                        message.jsonData = reader.string();
+                                        message.directUserRequest = reader.bool();
                                         break;
                                     }
-                                case 1: {
-                                        message.name = reader.string();
+                                case 6: {
+                                        message.sessionId = reader.string();
                                         break;
                                     }
-                                case 2: {
-                                        message.id = reader.string();
+                                case 7: {
+                                        message.pageInfo = $root.google.cloud.discoveryengine.v1.PageInfo.decode(reader, reader.uint32());
                                         break;
                                     }
-                                case 3: {
-                                        message.schemaId = reader.string();
+                                case 8: {
+                                        message.attributionToken = reader.string();
+                                        break;
+                                    }
+                                case 9: {
+                                        message.filter = reader.string();
                                         break;
                                     }
                                 case 10: {
-                                        message.content = $root.google.cloud.discoveryengine.v1.Document.Content.decode(reader, reader.uint32());
+                                        if (!(message.documents && message.documents.length))
+                                            message.documents = [];
+                                        message.documents.push($root.google.cloud.discoveryengine.v1.DocumentInfo.decode(reader, reader.uint32()));
                                         break;
                                     }
-                                case 7: {
-                                        message.parentDocumentId = reader.string();
+                                case 11: {
+                                        message.panel = $root.google.cloud.discoveryengine.v1.PanelInfo.decode(reader, reader.uint32());
                                         break;
                                     }
-                                case 6: {
-                                        message.derivedStructData = $root.google.protobuf.Struct.decode(reader, reader.uint32());
+                                case 12: {
+                                        message.searchInfo = $root.google.cloud.discoveryengine.v1.SearchInfo.decode(reader, reader.uint32());
                                         break;
                                     }
                                 case 13: {
-                                        message.indexTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
+                                        message.completionInfo = $root.google.cloud.discoveryengine.v1.CompletionInfo.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 14: {
+                                        message.transactionInfo = $root.google.cloud.discoveryengine.v1.TransactionInfo.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 15: {
+                                        if (!(message.tagIds && message.tagIds.length))
+                                            message.tagIds = [];
+                                        message.tagIds.push(reader.string());
+                                        break;
+                                    }
+                                case 16: {
+                                        if (!(message.promotionIds && message.promotionIds.length))
+                                            message.promotionIds = [];
+                                        message.promotionIds.push(reader.string());
+                                        break;
+                                    }
+                                case 17: {
+                                        if (message.attributes === $util.emptyObject)
+                                            message.attributes = {};
+                                        var end2 = reader.uint32() + reader.pos;
+                                        key = "";
+                                        value = null;
+                                        while (reader.pos < end2) {
+                                            var tag2 = reader.uint32();
+                                            switch (tag2 >>> 3) {
+                                            case 1:
+                                                key = reader.string();
+                                                break;
+                                            case 2:
+                                                value = $root.google.cloud.discoveryengine.v1.CustomAttribute.decode(reader, reader.uint32());
+                                                break;
+                                            default:
+                                                reader.skipType(tag2 & 7);
+                                                break;
+                                            }
+                                        }
+                                        message.attributes[key] = value;
+                                        break;
+                                    }
+                                case 18: {
+                                        message.mediaInfo = $root.google.cloud.discoveryengine.v1.MediaInfo.decode(reader, reader.uint32());
                                         break;
                                     }
                                 default:
@@ -14290,519 +18329,653 @@
                         };
     
                         /**
-                         * Decodes a Document message from the specified reader or buffer, length delimited.
+                         * Decodes a UserEvent message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.Document} Document
+                         * @returns {google.cloud.discoveryengine.v1.UserEvent} UserEvent
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        Document.decodeDelimited = function decodeDelimited(reader) {
+                        UserEvent.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a Document message.
+                         * Verifies a UserEvent message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        Document.verify = function verify(message) {
+                        UserEvent.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            var properties = {};
-                            if (message.structData != null && message.hasOwnProperty("structData")) {
-                                properties.data = 1;
-                                {
-                                    var error = $root.google.protobuf.Struct.verify(message.structData);
+                            if (message.eventType != null && message.hasOwnProperty("eventType"))
+                                if (!$util.isString(message.eventType))
+                                    return "eventType: string expected";
+                            if (message.userPseudoId != null && message.hasOwnProperty("userPseudoId"))
+                                if (!$util.isString(message.userPseudoId))
+                                    return "userPseudoId: string expected";
+                            if (message.engine != null && message.hasOwnProperty("engine"))
+                                if (!$util.isString(message.engine))
+                                    return "engine: string expected";
+                            if (message.dataStore != null && message.hasOwnProperty("dataStore"))
+                                if (!$util.isString(message.dataStore))
+                                    return "dataStore: string expected";
+                            if (message.eventTime != null && message.hasOwnProperty("eventTime")) {
+                                var error = $root.google.protobuf.Timestamp.verify(message.eventTime);
+                                if (error)
+                                    return "eventTime." + error;
+                            }
+                            if (message.userInfo != null && message.hasOwnProperty("userInfo")) {
+                                var error = $root.google.cloud.discoveryengine.v1.UserInfo.verify(message.userInfo);
+                                if (error)
+                                    return "userInfo." + error;
+                            }
+                            if (message.directUserRequest != null && message.hasOwnProperty("directUserRequest"))
+                                if (typeof message.directUserRequest !== "boolean")
+                                    return "directUserRequest: boolean expected";
+                            if (message.sessionId != null && message.hasOwnProperty("sessionId"))
+                                if (!$util.isString(message.sessionId))
+                                    return "sessionId: string expected";
+                            if (message.pageInfo != null && message.hasOwnProperty("pageInfo")) {
+                                var error = $root.google.cloud.discoveryengine.v1.PageInfo.verify(message.pageInfo);
+                                if (error)
+                                    return "pageInfo." + error;
+                            }
+                            if (message.attributionToken != null && message.hasOwnProperty("attributionToken"))
+                                if (!$util.isString(message.attributionToken))
+                                    return "attributionToken: string expected";
+                            if (message.filter != null && message.hasOwnProperty("filter"))
+                                if (!$util.isString(message.filter))
+                                    return "filter: string expected";
+                            if (message.documents != null && message.hasOwnProperty("documents")) {
+                                if (!Array.isArray(message.documents))
+                                    return "documents: array expected";
+                                for (var i = 0; i < message.documents.length; ++i) {
+                                    var error = $root.google.cloud.discoveryengine.v1.DocumentInfo.verify(message.documents[i]);
                                     if (error)
-                                        return "structData." + error;
+                                        return "documents." + error;
                                 }
                             }
-                            if (message.jsonData != null && message.hasOwnProperty("jsonData")) {
-                                if (properties.data === 1)
-                                    return "data: multiple values";
-                                properties.data = 1;
-                                if (!$util.isString(message.jsonData))
-                                    return "jsonData: string expected";
+                            if (message.panel != null && message.hasOwnProperty("panel")) {
+                                var error = $root.google.cloud.discoveryengine.v1.PanelInfo.verify(message.panel);
+                                if (error)
+                                    return "panel." + error;
                             }
-                            if (message.name != null && message.hasOwnProperty("name"))
-                                if (!$util.isString(message.name))
-                                    return "name: string expected";
-                            if (message.id != null && message.hasOwnProperty("id"))
-                                if (!$util.isString(message.id))
-                                    return "id: string expected";
-                            if (message.schemaId != null && message.hasOwnProperty("schemaId"))
-                                if (!$util.isString(message.schemaId))
-                                    return "schemaId: string expected";
-                            if (message.content != null && message.hasOwnProperty("content")) {
-                                var error = $root.google.cloud.discoveryengine.v1.Document.Content.verify(message.content);
+                            if (message.searchInfo != null && message.hasOwnProperty("searchInfo")) {
+                                var error = $root.google.cloud.discoveryengine.v1.SearchInfo.verify(message.searchInfo);
                                 if (error)
-                                    return "content." + error;
+                                    return "searchInfo." + error;
                             }
-                            if (message.parentDocumentId != null && message.hasOwnProperty("parentDocumentId"))
-                                if (!$util.isString(message.parentDocumentId))
-                                    return "parentDocumentId: string expected";
-                            if (message.derivedStructData != null && message.hasOwnProperty("derivedStructData")) {
-                                var error = $root.google.protobuf.Struct.verify(message.derivedStructData);
+                            if (message.completionInfo != null && message.hasOwnProperty("completionInfo")) {
+                                var error = $root.google.cloud.discoveryengine.v1.CompletionInfo.verify(message.completionInfo);
                                 if (error)
-                                    return "derivedStructData." + error;
+                                    return "completionInfo." + error;
                             }
-                            if (message.indexTime != null && message.hasOwnProperty("indexTime")) {
-                                var error = $root.google.protobuf.Timestamp.verify(message.indexTime);
+                            if (message.transactionInfo != null && message.hasOwnProperty("transactionInfo")) {
+                                var error = $root.google.cloud.discoveryengine.v1.TransactionInfo.verify(message.transactionInfo);
                                 if (error)
-                                    return "indexTime." + error;
+                                    return "transactionInfo." + error;
+                            }
+                            if (message.tagIds != null && message.hasOwnProperty("tagIds")) {
+                                if (!Array.isArray(message.tagIds))
+                                    return "tagIds: array expected";
+                                for (var i = 0; i < message.tagIds.length; ++i)
+                                    if (!$util.isString(message.tagIds[i]))
+                                        return "tagIds: string[] expected";
+                            }
+                            if (message.promotionIds != null && message.hasOwnProperty("promotionIds")) {
+                                if (!Array.isArray(message.promotionIds))
+                                    return "promotionIds: array expected";
+                                for (var i = 0; i < message.promotionIds.length; ++i)
+                                    if (!$util.isString(message.promotionIds[i]))
+                                        return "promotionIds: string[] expected";
+                            }
+                            if (message.attributes != null && message.hasOwnProperty("attributes")) {
+                                if (!$util.isObject(message.attributes))
+                                    return "attributes: object expected";
+                                var key = Object.keys(message.attributes);
+                                for (var i = 0; i < key.length; ++i) {
+                                    var error = $root.google.cloud.discoveryengine.v1.CustomAttribute.verify(message.attributes[key[i]]);
+                                    if (error)
+                                        return "attributes." + error;
+                                }
+                            }
+                            if (message.mediaInfo != null && message.hasOwnProperty("mediaInfo")) {
+                                var error = $root.google.cloud.discoveryengine.v1.MediaInfo.verify(message.mediaInfo);
+                                if (error)
+                                    return "mediaInfo." + error;
                             }
                             return null;
                         };
     
                         /**
-                         * Creates a Document message from a plain object. Also converts values to their respective internal types.
+                         * Creates a UserEvent message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.Document} Document
+                         * @returns {google.cloud.discoveryengine.v1.UserEvent} UserEvent
                          */
-                        Document.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.Document)
+                        UserEvent.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.UserEvent)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.Document();
-                            if (object.structData != null) {
-                                if (typeof object.structData !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.Document.structData: object expected");
-                                message.structData = $root.google.protobuf.Struct.fromObject(object.structData);
+                            var message = new $root.google.cloud.discoveryengine.v1.UserEvent();
+                            if (object.eventType != null)
+                                message.eventType = String(object.eventType);
+                            if (object.userPseudoId != null)
+                                message.userPseudoId = String(object.userPseudoId);
+                            if (object.engine != null)
+                                message.engine = String(object.engine);
+                            if (object.dataStore != null)
+                                message.dataStore = String(object.dataStore);
+                            if (object.eventTime != null) {
+                                if (typeof object.eventTime !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.eventTime: object expected");
+                                message.eventTime = $root.google.protobuf.Timestamp.fromObject(object.eventTime);
                             }
-                            if (object.jsonData != null)
-                                message.jsonData = String(object.jsonData);
-                            if (object.name != null)
-                                message.name = String(object.name);
-                            if (object.id != null)
-                                message.id = String(object.id);
-                            if (object.schemaId != null)
-                                message.schemaId = String(object.schemaId);
-                            if (object.content != null) {
-                                if (typeof object.content !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.Document.content: object expected");
-                                message.content = $root.google.cloud.discoveryengine.v1.Document.Content.fromObject(object.content);
+                            if (object.userInfo != null) {
+                                if (typeof object.userInfo !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.userInfo: object expected");
+                                message.userInfo = $root.google.cloud.discoveryengine.v1.UserInfo.fromObject(object.userInfo);
+                            }
+                            if (object.directUserRequest != null)
+                                message.directUserRequest = Boolean(object.directUserRequest);
+                            if (object.sessionId != null)
+                                message.sessionId = String(object.sessionId);
+                            if (object.pageInfo != null) {
+                                if (typeof object.pageInfo !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.pageInfo: object expected");
+                                message.pageInfo = $root.google.cloud.discoveryengine.v1.PageInfo.fromObject(object.pageInfo);
+                            }
+                            if (object.attributionToken != null)
+                                message.attributionToken = String(object.attributionToken);
+                            if (object.filter != null)
+                                message.filter = String(object.filter);
+                            if (object.documents) {
+                                if (!Array.isArray(object.documents))
+                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.documents: array expected");
+                                message.documents = [];
+                                for (var i = 0; i < object.documents.length; ++i) {
+                                    if (typeof object.documents[i] !== "object")
+                                        throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.documents: object expected");
+                                    message.documents[i] = $root.google.cloud.discoveryengine.v1.DocumentInfo.fromObject(object.documents[i]);
+                                }
+                            }
+                            if (object.panel != null) {
+                                if (typeof object.panel !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.panel: object expected");
+                                message.panel = $root.google.cloud.discoveryengine.v1.PanelInfo.fromObject(object.panel);
+                            }
+                            if (object.searchInfo != null) {
+                                if (typeof object.searchInfo !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.searchInfo: object expected");
+                                message.searchInfo = $root.google.cloud.discoveryengine.v1.SearchInfo.fromObject(object.searchInfo);
+                            }
+                            if (object.completionInfo != null) {
+                                if (typeof object.completionInfo !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.completionInfo: object expected");
+                                message.completionInfo = $root.google.cloud.discoveryengine.v1.CompletionInfo.fromObject(object.completionInfo);
+                            }
+                            if (object.transactionInfo != null) {
+                                if (typeof object.transactionInfo !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.transactionInfo: object expected");
+                                message.transactionInfo = $root.google.cloud.discoveryengine.v1.TransactionInfo.fromObject(object.transactionInfo);
                             }
-                            if (object.parentDocumentId != null)
-                                message.parentDocumentId = String(object.parentDocumentId);
-                            if (object.derivedStructData != null) {
-                                if (typeof object.derivedStructData !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.Document.derivedStructData: object expected");
-                                message.derivedStructData = $root.google.protobuf.Struct.fromObject(object.derivedStructData);
+                            if (object.tagIds) {
+                                if (!Array.isArray(object.tagIds))
+                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.tagIds: array expected");
+                                message.tagIds = [];
+                                for (var i = 0; i < object.tagIds.length; ++i)
+                                    message.tagIds[i] = String(object.tagIds[i]);
                             }
-                            if (object.indexTime != null) {
-                                if (typeof object.indexTime !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.Document.indexTime: object expected");
-                                message.indexTime = $root.google.protobuf.Timestamp.fromObject(object.indexTime);
+                            if (object.promotionIds) {
+                                if (!Array.isArray(object.promotionIds))
+                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.promotionIds: array expected");
+                                message.promotionIds = [];
+                                for (var i = 0; i < object.promotionIds.length; ++i)
+                                    message.promotionIds[i] = String(object.promotionIds[i]);
+                            }
+                            if (object.attributes) {
+                                if (typeof object.attributes !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.attributes: object expected");
+                                message.attributes = {};
+                                for (var keys = Object.keys(object.attributes), i = 0; i < keys.length; ++i) {
+                                    if (typeof object.attributes[keys[i]] !== "object")
+                                        throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.attributes: object expected");
+                                    message.attributes[keys[i]] = $root.google.cloud.discoveryengine.v1.CustomAttribute.fromObject(object.attributes[keys[i]]);
+                                }
+                            }
+                            if (object.mediaInfo != null) {
+                                if (typeof object.mediaInfo !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.mediaInfo: object expected");
+                                message.mediaInfo = $root.google.cloud.discoveryengine.v1.MediaInfo.fromObject(object.mediaInfo);
                             }
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a Document message. Also converts values to other types if specified.
+                         * Creates a plain object from a UserEvent message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.Document} message Document
+                         * @param {google.cloud.discoveryengine.v1.UserEvent} message UserEvent
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        Document.toObject = function toObject(message, options) {
+                        UserEvent.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
+                            if (options.arrays || options.defaults) {
+                                object.documents = [];
+                                object.tagIds = [];
+                                object.promotionIds = [];
+                            }
+                            if (options.objects || options.defaults)
+                                object.attributes = {};
                             if (options.defaults) {
-                                object.name = "";
-                                object.id = "";
-                                object.schemaId = "";
-                                object.derivedStructData = null;
-                                object.parentDocumentId = "";
-                                object.content = null;
-                                object.indexTime = null;
+                                object.eventType = "";
+                                object.userPseudoId = "";
+                                object.eventTime = null;
+                                object.userInfo = null;
+                                object.directUserRequest = false;
+                                object.sessionId = "";
+                                object.pageInfo = null;
+                                object.attributionToken = "";
+                                object.filter = "";
+                                object.panel = null;
+                                object.searchInfo = null;
+                                object.completionInfo = null;
+                                object.transactionInfo = null;
+                                object.mediaInfo = null;
+                                object.engine = "";
+                                object.dataStore = "";
                             }
-                            if (message.name != null && message.hasOwnProperty("name"))
-                                object.name = message.name;
-                            if (message.id != null && message.hasOwnProperty("id"))
-                                object.id = message.id;
-                            if (message.schemaId != null && message.hasOwnProperty("schemaId"))
-                                object.schemaId = message.schemaId;
-                            if (message.structData != null && message.hasOwnProperty("structData")) {
-                                object.structData = $root.google.protobuf.Struct.toObject(message.structData, options);
-                                if (options.oneofs)
-                                    object.data = "structData";
+                            if (message.eventType != null && message.hasOwnProperty("eventType"))
+                                object.eventType = message.eventType;
+                            if (message.userPseudoId != null && message.hasOwnProperty("userPseudoId"))
+                                object.userPseudoId = message.userPseudoId;
+                            if (message.eventTime != null && message.hasOwnProperty("eventTime"))
+                                object.eventTime = $root.google.protobuf.Timestamp.toObject(message.eventTime, options);
+                            if (message.userInfo != null && message.hasOwnProperty("userInfo"))
+                                object.userInfo = $root.google.cloud.discoveryengine.v1.UserInfo.toObject(message.userInfo, options);
+                            if (message.directUserRequest != null && message.hasOwnProperty("directUserRequest"))
+                                object.directUserRequest = message.directUserRequest;
+                            if (message.sessionId != null && message.hasOwnProperty("sessionId"))
+                                object.sessionId = message.sessionId;
+                            if (message.pageInfo != null && message.hasOwnProperty("pageInfo"))
+                                object.pageInfo = $root.google.cloud.discoveryengine.v1.PageInfo.toObject(message.pageInfo, options);
+                            if (message.attributionToken != null && message.hasOwnProperty("attributionToken"))
+                                object.attributionToken = message.attributionToken;
+                            if (message.filter != null && message.hasOwnProperty("filter"))
+                                object.filter = message.filter;
+                            if (message.documents && message.documents.length) {
+                                object.documents = [];
+                                for (var j = 0; j < message.documents.length; ++j)
+                                    object.documents[j] = $root.google.cloud.discoveryengine.v1.DocumentInfo.toObject(message.documents[j], options);
                             }
-                            if (message.jsonData != null && message.hasOwnProperty("jsonData")) {
-                                object.jsonData = message.jsonData;
-                                if (options.oneofs)
-                                    object.data = "jsonData";
+                            if (message.panel != null && message.hasOwnProperty("panel"))
+                                object.panel = $root.google.cloud.discoveryengine.v1.PanelInfo.toObject(message.panel, options);
+                            if (message.searchInfo != null && message.hasOwnProperty("searchInfo"))
+                                object.searchInfo = $root.google.cloud.discoveryengine.v1.SearchInfo.toObject(message.searchInfo, options);
+                            if (message.completionInfo != null && message.hasOwnProperty("completionInfo"))
+                                object.completionInfo = $root.google.cloud.discoveryengine.v1.CompletionInfo.toObject(message.completionInfo, options);
+                            if (message.transactionInfo != null && message.hasOwnProperty("transactionInfo"))
+                                object.transactionInfo = $root.google.cloud.discoveryengine.v1.TransactionInfo.toObject(message.transactionInfo, options);
+                            if (message.tagIds && message.tagIds.length) {
+                                object.tagIds = [];
+                                for (var j = 0; j < message.tagIds.length; ++j)
+                                    object.tagIds[j] = message.tagIds[j];
                             }
-                            if (message.derivedStructData != null && message.hasOwnProperty("derivedStructData"))
-                                object.derivedStructData = $root.google.protobuf.Struct.toObject(message.derivedStructData, options);
-                            if (message.parentDocumentId != null && message.hasOwnProperty("parentDocumentId"))
-                                object.parentDocumentId = message.parentDocumentId;
-                            if (message.content != null && message.hasOwnProperty("content"))
-                                object.content = $root.google.cloud.discoveryengine.v1.Document.Content.toObject(message.content, options);
-                            if (message.indexTime != null && message.hasOwnProperty("indexTime"))
-                                object.indexTime = $root.google.protobuf.Timestamp.toObject(message.indexTime, options);
+                            if (message.promotionIds && message.promotionIds.length) {
+                                object.promotionIds = [];
+                                for (var j = 0; j < message.promotionIds.length; ++j)
+                                    object.promotionIds[j] = message.promotionIds[j];
+                            }
+                            var keys2;
+                            if (message.attributes && (keys2 = Object.keys(message.attributes)).length) {
+                                object.attributes = {};
+                                for (var j = 0; j < keys2.length; ++j)
+                                    object.attributes[keys2[j]] = $root.google.cloud.discoveryengine.v1.CustomAttribute.toObject(message.attributes[keys2[j]], options);
+                            }
+                            if (message.mediaInfo != null && message.hasOwnProperty("mediaInfo"))
+                                object.mediaInfo = $root.google.cloud.discoveryengine.v1.MediaInfo.toObject(message.mediaInfo, options);
+                            if (message.engine != null && message.hasOwnProperty("engine"))
+                                object.engine = message.engine;
+                            if (message.dataStore != null && message.hasOwnProperty("dataStore"))
+                                object.dataStore = message.dataStore;
                             return object;
                         };
     
                         /**
-                         * Converts this Document to JSON.
+                         * Converts this UserEvent to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        Document.prototype.toJSON = function toJSON() {
+                        UserEvent.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for Document
+                         * Gets the default type url for UserEvent
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.Document
+                         * @memberof google.cloud.discoveryengine.v1.UserEvent
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        Document.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        UserEvent.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.Document";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.UserEvent";
                         };
     
-                        Document.Content = (function() {
-    
-                            /**
-                             * Properties of a Content.
-                             * @memberof google.cloud.discoveryengine.v1.Document
-                             * @interface IContent
-                             * @property {Uint8Array|null} [rawBytes] Content rawBytes
-                             * @property {string|null} [uri] Content uri
-                             * @property {string|null} [mimeType] Content mimeType
-                             */
-    
-                            /**
-                             * Constructs a new Content.
-                             * @memberof google.cloud.discoveryengine.v1.Document
-                             * @classdesc Represents a Content.
-                             * @implements IContent
-                             * @constructor
-                             * @param {google.cloud.discoveryengine.v1.Document.IContent=} [properties] Properties to set
-                             */
-                            function Content(properties) {
-                                if (properties)
-                                    for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
-                                        if (properties[keys[i]] != null)
-                                            this[keys[i]] = properties[keys[i]];
-                            }
-    
-                            /**
-                             * Content rawBytes.
-                             * @member {Uint8Array|null|undefined} rawBytes
-                             * @memberof google.cloud.discoveryengine.v1.Document.Content
-                             * @instance
-                             */
-                            Content.prototype.rawBytes = null;
-    
-                            /**
-                             * Content uri.
-                             * @member {string|null|undefined} uri
-                             * @memberof google.cloud.discoveryengine.v1.Document.Content
-                             * @instance
-                             */
-                            Content.prototype.uri = null;
+                        return UserEvent;
+                    })();
     
-                            /**
-                             * Content mimeType.
-                             * @member {string} mimeType
-                             * @memberof google.cloud.discoveryengine.v1.Document.Content
-                             * @instance
-                             */
-                            Content.prototype.mimeType = "";
+                    v1.PageInfo = (function() {
     
-                            // OneOf field names bound to virtual getters and setters
-                            var $oneOfFields;
+                        /**
+                         * Properties of a PageInfo.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @interface IPageInfo
+                         * @property {string|null} [pageviewId] PageInfo pageviewId
+                         * @property {string|null} [pageCategory] PageInfo pageCategory
+                         * @property {string|null} [uri] PageInfo uri
+                         * @property {string|null} [referrerUri] PageInfo referrerUri
+                         */
     
-                            /**
-                             * Content content.
-                             * @member {"rawBytes"|"uri"|undefined} content
-                             * @memberof google.cloud.discoveryengine.v1.Document.Content
-                             * @instance
-                             */
-                            Object.defineProperty(Content.prototype, "content", {
-                                get: $util.oneOfGetter($oneOfFields = ["rawBytes", "uri"]),
-                                set: $util.oneOfSetter($oneOfFields)
-                            });
+                        /**
+                         * Constructs a new PageInfo.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @classdesc Represents a PageInfo.
+                         * @implements IPageInfo
+                         * @constructor
+                         * @param {google.cloud.discoveryengine.v1.IPageInfo=} [properties] Properties to set
+                         */
+                        function PageInfo(properties) {
+                            if (properties)
+                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                    if (properties[keys[i]] != null)
+                                        this[keys[i]] = properties[keys[i]];
+                        }
     
-                            /**
-                             * Creates a new Content instance using the specified properties.
-                             * @function create
-                             * @memberof google.cloud.discoveryengine.v1.Document.Content
-                             * @static
-                             * @param {google.cloud.discoveryengine.v1.Document.IContent=} [properties] Properties to set
-                             * @returns {google.cloud.discoveryengine.v1.Document.Content} Content instance
-                             */
-                            Content.create = function create(properties) {
-                                return new Content(properties);
-                            };
+                        /**
+                         * PageInfo pageviewId.
+                         * @member {string} pageviewId
+                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @instance
+                         */
+                        PageInfo.prototype.pageviewId = "";
     
-                            /**
-                             * Encodes the specified Content message. Does not implicitly {@link google.cloud.discoveryengine.v1.Document.Content.verify|verify} messages.
-                             * @function encode
-                             * @memberof google.cloud.discoveryengine.v1.Document.Content
-                             * @static
-                             * @param {google.cloud.discoveryengine.v1.Document.IContent} message Content message or plain object to encode
-                             * @param {$protobuf.Writer} [writer] Writer to encode to
-                             * @returns {$protobuf.Writer} Writer
-                             */
-                            Content.encode = function encode(message, writer) {
-                                if (!writer)
-                                    writer = $Writer.create();
-                                if (message.mimeType != null && Object.hasOwnProperty.call(message, "mimeType"))
-                                    writer.uint32(/* id 1, wireType 2 =*/10).string(message.mimeType);
-                                if (message.rawBytes != null && Object.hasOwnProperty.call(message, "rawBytes"))
-                                    writer.uint32(/* id 2, wireType 2 =*/18).bytes(message.rawBytes);
-                                if (message.uri != null && Object.hasOwnProperty.call(message, "uri"))
-                                    writer.uint32(/* id 3, wireType 2 =*/26).string(message.uri);
-                                return writer;
-                            };
+                        /**
+                         * PageInfo pageCategory.
+                         * @member {string} pageCategory
+                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @instance
+                         */
+                        PageInfo.prototype.pageCategory = "";
     
-                            /**
-                             * Encodes the specified Content message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.Document.Content.verify|verify} messages.
-                             * @function encodeDelimited
-                             * @memberof google.cloud.discoveryengine.v1.Document.Content
-                             * @static
-                             * @param {google.cloud.discoveryengine.v1.Document.IContent} message Content message or plain object to encode
-                             * @param {$protobuf.Writer} [writer] Writer to encode to
-                             * @returns {$protobuf.Writer} Writer
-                             */
-                            Content.encodeDelimited = function encodeDelimited(message, writer) {
-                                return this.encode(message, writer).ldelim();
-                            };
+                        /**
+                         * PageInfo uri.
+                         * @member {string} uri
+                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @instance
+                         */
+                        PageInfo.prototype.uri = "";
     
-                            /**
-                             * Decodes a Content message from the specified reader or buffer.
-                             * @function decode
-                             * @memberof google.cloud.discoveryengine.v1.Document.Content
-                             * @static
-                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                             * @param {number} [length] Message length if known beforehand
-                             * @returns {google.cloud.discoveryengine.v1.Document.Content} Content
-                             * @throws {Error} If the payload is not a reader or valid buffer
-                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                             */
-                            Content.decode = function decode(reader, length) {
-                                if (!(reader instanceof $Reader))
-                                    reader = $Reader.create(reader);
-                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.Document.Content();
-                                while (reader.pos < end) {
-                                    var tag = reader.uint32();
-                                    switch (tag >>> 3) {
-                                    case 2: {
-                                            message.rawBytes = reader.bytes();
-                                            break;
-                                        }
-                                    case 3: {
-                                            message.uri = reader.string();
-                                            break;
-                                        }
-                                    case 1: {
-                                            message.mimeType = reader.string();
-                                            break;
-                                        }
-                                    default:
-                                        reader.skipType(tag & 7);
-                                        break;
-                                    }
-                                }
-                                return message;
-                            };
+                        /**
+                         * PageInfo referrerUri.
+                         * @member {string} referrerUri
+                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @instance
+                         */
+                        PageInfo.prototype.referrerUri = "";
     
-                            /**
-                             * Decodes a Content message from the specified reader or buffer, length delimited.
-                             * @function decodeDelimited
-                             * @memberof google.cloud.discoveryengine.v1.Document.Content
-                             * @static
-                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                             * @returns {google.cloud.discoveryengine.v1.Document.Content} Content
-                             * @throws {Error} If the payload is not a reader or valid buffer
-                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                             */
-                            Content.decodeDelimited = function decodeDelimited(reader) {
-                                if (!(reader instanceof $Reader))
-                                    reader = new $Reader(reader);
-                                return this.decode(reader, reader.uint32());
-                            };
+                        /**
+                         * Creates a new PageInfo instance using the specified properties.
+                         * @function create
+                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.IPageInfo=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.PageInfo} PageInfo instance
+                         */
+                        PageInfo.create = function create(properties) {
+                            return new PageInfo(properties);
+                        };
     
-                            /**
-                             * Verifies a Content message.
-                             * @function verify
-                             * @memberof google.cloud.discoveryengine.v1.Document.Content
-                             * @static
-                             * @param {Object.<string,*>} message Plain object to verify
-                             * @returns {string|null} `null` if valid, otherwise the reason why it is not
-                             */
-                            Content.verify = function verify(message) {
-                                if (typeof message !== "object" || message === null)
-                                    return "object expected";
-                                var properties = {};
-                                if (message.rawBytes != null && message.hasOwnProperty("rawBytes")) {
-                                    properties.content = 1;
-                                    if (!(message.rawBytes && typeof message.rawBytes.length === "number" || $util.isString(message.rawBytes)))
-                                        return "rawBytes: buffer expected";
-                                }
-                                if (message.uri != null && message.hasOwnProperty("uri")) {
-                                    if (properties.content === 1)
-                                        return "content: multiple values";
-                                    properties.content = 1;
-                                    if (!$util.isString(message.uri))
-                                        return "uri: string expected";
-                                }
-                                if (message.mimeType != null && message.hasOwnProperty("mimeType"))
-                                    if (!$util.isString(message.mimeType))
-                                        return "mimeType: string expected";
-                                return null;
-                            };
+                        /**
+                         * Encodes the specified PageInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.PageInfo.verify|verify} messages.
+                         * @function encode
+                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.IPageInfo} message PageInfo message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        PageInfo.encode = function encode(message, writer) {
+                            if (!writer)
+                                writer = $Writer.create();
+                            if (message.pageviewId != null && Object.hasOwnProperty.call(message, "pageviewId"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.pageviewId);
+                            if (message.pageCategory != null && Object.hasOwnProperty.call(message, "pageCategory"))
+                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.pageCategory);
+                            if (message.uri != null && Object.hasOwnProperty.call(message, "uri"))
+                                writer.uint32(/* id 3, wireType 2 =*/26).string(message.uri);
+                            if (message.referrerUri != null && Object.hasOwnProperty.call(message, "referrerUri"))
+                                writer.uint32(/* id 4, wireType 2 =*/34).string(message.referrerUri);
+                            return writer;
+                        };
     
-                            /**
-                             * Creates a Content message from a plain object. Also converts values to their respective internal types.
-                             * @function fromObject
-                             * @memberof google.cloud.discoveryengine.v1.Document.Content
-                             * @static
-                             * @param {Object.<string,*>} object Plain object
-                             * @returns {google.cloud.discoveryengine.v1.Document.Content} Content
-                             */
-                            Content.fromObject = function fromObject(object) {
-                                if (object instanceof $root.google.cloud.discoveryengine.v1.Document.Content)
-                                    return object;
-                                var message = new $root.google.cloud.discoveryengine.v1.Document.Content();
-                                if (object.rawBytes != null)
-                                    if (typeof object.rawBytes === "string")
-                                        $util.base64.decode(object.rawBytes, message.rawBytes = $util.newBuffer($util.base64.length(object.rawBytes)), 0);
-                                    else if (object.rawBytes.length >= 0)
-                                        message.rawBytes = object.rawBytes;
-                                if (object.uri != null)
-                                    message.uri = String(object.uri);
-                                if (object.mimeType != null)
-                                    message.mimeType = String(object.mimeType);
-                                return message;
-                            };
+                        /**
+                         * Encodes the specified PageInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PageInfo.verify|verify} messages.
+                         * @function encodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.IPageInfo} message PageInfo message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        PageInfo.encodeDelimited = function encodeDelimited(message, writer) {
+                            return this.encode(message, writer).ldelim();
+                        };
     
-                            /**
-                             * Creates a plain object from a Content message. Also converts values to other types if specified.
-                             * @function toObject
-                             * @memberof google.cloud.discoveryengine.v1.Document.Content
-                             * @static
-                             * @param {google.cloud.discoveryengine.v1.Document.Content} message Content
-                             * @param {$protobuf.IConversionOptions} [options] Conversion options
-                             * @returns {Object.<string,*>} Plain object
-                             */
-                            Content.toObject = function toObject(message, options) {
-                                if (!options)
-                                    options = {};
-                                var object = {};
-                                if (options.defaults)
-                                    object.mimeType = "";
-                                if (message.mimeType != null && message.hasOwnProperty("mimeType"))
-                                    object.mimeType = message.mimeType;
-                                if (message.rawBytes != null && message.hasOwnProperty("rawBytes")) {
-                                    object.rawBytes = options.bytes === String ? $util.base64.encode(message.rawBytes, 0, message.rawBytes.length) : options.bytes === Array ? Array.prototype.slice.call(message.rawBytes) : message.rawBytes;
-                                    if (options.oneofs)
-                                        object.content = "rawBytes";
-                                }
-                                if (message.uri != null && message.hasOwnProperty("uri")) {
-                                    object.uri = message.uri;
-                                    if (options.oneofs)
-                                        object.content = "uri";
+                        /**
+                         * Decodes a PageInfo message from the specified reader or buffer.
+                         * @function decode
+                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @param {number} [length] Message length if known beforehand
+                         * @returns {google.cloud.discoveryengine.v1.PageInfo} PageInfo
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        PageInfo.decode = function decode(reader, length) {
+                            if (!(reader instanceof $Reader))
+                                reader = $Reader.create(reader);
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.PageInfo();
+                            while (reader.pos < end) {
+                                var tag = reader.uint32();
+                                switch (tag >>> 3) {
+                                case 1: {
+                                        message.pageviewId = reader.string();
+                                        break;
+                                    }
+                                case 2: {
+                                        message.pageCategory = reader.string();
+                                        break;
+                                    }
+                                case 3: {
+                                        message.uri = reader.string();
+                                        break;
+                                    }
+                                case 4: {
+                                        message.referrerUri = reader.string();
+                                        break;
+                                    }
+                                default:
+                                    reader.skipType(tag & 7);
+                                    break;
                                 }
+                            }
+                            return message;
+                        };
+    
+                        /**
+                         * Decodes a PageInfo message from the specified reader or buffer, length delimited.
+                         * @function decodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @returns {google.cloud.discoveryengine.v1.PageInfo} PageInfo
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        PageInfo.decodeDelimited = function decodeDelimited(reader) {
+                            if (!(reader instanceof $Reader))
+                                reader = new $Reader(reader);
+                            return this.decode(reader, reader.uint32());
+                        };
+    
+                        /**
+                         * Verifies a PageInfo message.
+                         * @function verify
+                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @static
+                         * @param {Object.<string,*>} message Plain object to verify
+                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                         */
+                        PageInfo.verify = function verify(message) {
+                            if (typeof message !== "object" || message === null)
+                                return "object expected";
+                            if (message.pageviewId != null && message.hasOwnProperty("pageviewId"))
+                                if (!$util.isString(message.pageviewId))
+                                    return "pageviewId: string expected";
+                            if (message.pageCategory != null && message.hasOwnProperty("pageCategory"))
+                                if (!$util.isString(message.pageCategory))
+                                    return "pageCategory: string expected";
+                            if (message.uri != null && message.hasOwnProperty("uri"))
+                                if (!$util.isString(message.uri))
+                                    return "uri: string expected";
+                            if (message.referrerUri != null && message.hasOwnProperty("referrerUri"))
+                                if (!$util.isString(message.referrerUri))
+                                    return "referrerUri: string expected";
+                            return null;
+                        };
+    
+                        /**
+                         * Creates a PageInfo message from a plain object. Also converts values to their respective internal types.
+                         * @function fromObject
+                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @static
+                         * @param {Object.<string,*>} object Plain object
+                         * @returns {google.cloud.discoveryengine.v1.PageInfo} PageInfo
+                         */
+                        PageInfo.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.PageInfo)
                                 return object;
-                            };
+                            var message = new $root.google.cloud.discoveryengine.v1.PageInfo();
+                            if (object.pageviewId != null)
+                                message.pageviewId = String(object.pageviewId);
+                            if (object.pageCategory != null)
+                                message.pageCategory = String(object.pageCategory);
+                            if (object.uri != null)
+                                message.uri = String(object.uri);
+                            if (object.referrerUri != null)
+                                message.referrerUri = String(object.referrerUri);
+                            return message;
+                        };
     
-                            /**
-                             * Converts this Content to JSON.
-                             * @function toJSON
-                             * @memberof google.cloud.discoveryengine.v1.Document.Content
-                             * @instance
-                             * @returns {Object.<string,*>} JSON object
-                             */
-                            Content.prototype.toJSON = function toJSON() {
-                                return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
-                            };
+                        /**
+                         * Creates a plain object from a PageInfo message. Also converts values to other types if specified.
+                         * @function toObject
+                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.PageInfo} message PageInfo
+                         * @param {$protobuf.IConversionOptions} [options] Conversion options
+                         * @returns {Object.<string,*>} Plain object
+                         */
+                        PageInfo.toObject = function toObject(message, options) {
+                            if (!options)
+                                options = {};
+                            var object = {};
+                            if (options.defaults) {
+                                object.pageviewId = "";
+                                object.pageCategory = "";
+                                object.uri = "";
+                                object.referrerUri = "";
+                            }
+                            if (message.pageviewId != null && message.hasOwnProperty("pageviewId"))
+                                object.pageviewId = message.pageviewId;
+                            if (message.pageCategory != null && message.hasOwnProperty("pageCategory"))
+                                object.pageCategory = message.pageCategory;
+                            if (message.uri != null && message.hasOwnProperty("uri"))
+                                object.uri = message.uri;
+                            if (message.referrerUri != null && message.hasOwnProperty("referrerUri"))
+                                object.referrerUri = message.referrerUri;
+                            return object;
+                        };
     
-                            /**
-                             * Gets the default type url for Content
-                             * @function getTypeUrl
-                             * @memberof google.cloud.discoveryengine.v1.Document.Content
-                             * @static
-                             * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                             * @returns {string} The default type url
-                             */
-                            Content.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
-                                if (typeUrlPrefix === undefined) {
-                                    typeUrlPrefix = "type.googleapis.com";
-                                }
-                                return typeUrlPrefix + "/google.cloud.discoveryengine.v1.Document.Content";
-                            };
+                        /**
+                         * Converts this PageInfo to JSON.
+                         * @function toJSON
+                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @instance
+                         * @returns {Object.<string,*>} JSON object
+                         */
+                        PageInfo.prototype.toJSON = function toJSON() {
+                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                        };
     
-                            return Content;
-                        })();
+                        /**
+                         * Gets the default type url for PageInfo
+                         * @function getTypeUrl
+                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @static
+                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns {string} The default type url
+                         */
+                        PageInfo.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                            if (typeUrlPrefix === undefined) {
+                                typeUrlPrefix = "type.googleapis.com";
+                            }
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.PageInfo";
+                        };
     
-                        return Document;
+                        return PageInfo;
                     })();
     
-                    v1.UserEvent = (function() {
+                    v1.SearchInfo = (function() {
     
                         /**
-                         * Properties of a UserEvent.
+                         * Properties of a SearchInfo.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IUserEvent
-                         * @property {string|null} [eventType] UserEvent eventType
-                         * @property {string|null} [userPseudoId] UserEvent userPseudoId
-                         * @property {string|null} [engine] UserEvent engine
-                         * @property {string|null} [dataStore] UserEvent dataStore
-                         * @property {google.protobuf.ITimestamp|null} [eventTime] UserEvent eventTime
-                         * @property {google.cloud.discoveryengine.v1.IUserInfo|null} [userInfo] UserEvent userInfo
-                         * @property {boolean|null} [directUserRequest] UserEvent directUserRequest
-                         * @property {string|null} [sessionId] UserEvent sessionId
-                         * @property {google.cloud.discoveryengine.v1.IPageInfo|null} [pageInfo] UserEvent pageInfo
-                         * @property {string|null} [attributionToken] UserEvent attributionToken
-                         * @property {string|null} [filter] UserEvent filter
-                         * @property {Array.<google.cloud.discoveryengine.v1.IDocumentInfo>|null} [documents] UserEvent documents
-                         * @property {google.cloud.discoveryengine.v1.IPanelInfo|null} [panel] UserEvent panel
-                         * @property {google.cloud.discoveryengine.v1.ISearchInfo|null} [searchInfo] UserEvent searchInfo
-                         * @property {google.cloud.discoveryengine.v1.ICompletionInfo|null} [completionInfo] UserEvent completionInfo
-                         * @property {google.cloud.discoveryengine.v1.ITransactionInfo|null} [transactionInfo] UserEvent transactionInfo
-                         * @property {Array.<string>|null} [tagIds] UserEvent tagIds
-                         * @property {Array.<string>|null} [promotionIds] UserEvent promotionIds
-                         * @property {Object.<string,google.cloud.discoveryengine.v1.ICustomAttribute>|null} [attributes] UserEvent attributes
-                         * @property {google.cloud.discoveryengine.v1.IMediaInfo|null} [mediaInfo] UserEvent mediaInfo
+                         * @interface ISearchInfo
+                         * @property {string|null} [searchQuery] SearchInfo searchQuery
+                         * @property {string|null} [orderBy] SearchInfo orderBy
+                         * @property {number|null} [offset] SearchInfo offset
                          */
     
                         /**
-                         * Constructs a new UserEvent.
+                         * Constructs a new SearchInfo.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a UserEvent.
-                         * @implements IUserEvent
+                         * @classdesc Represents a SearchInfo.
+                         * @implements ISearchInfo
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IUserEvent=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.ISearchInfo=} [properties] Properties to set
                          */
-                        function UserEvent(properties) {
-                            this.documents = [];
-                            this.tagIds = [];
-                            this.promotionIds = [];
-                            this.attributes = {};
+                        function SearchInfo(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -14810,372 +18983,357 @@
                         }
     
                         /**
-                         * UserEvent eventType.
-                         * @member {string} eventType
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * SearchInfo searchQuery.
+                         * @member {string} searchQuery
+                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
                          * @instance
                          */
-                        UserEvent.prototype.eventType = "";
+                        SearchInfo.prototype.searchQuery = "";
     
                         /**
-                         * UserEvent userPseudoId.
-                         * @member {string} userPseudoId
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * SearchInfo orderBy.
+                         * @member {string} orderBy
+                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
                          * @instance
                          */
-                        UserEvent.prototype.userPseudoId = "";
+                        SearchInfo.prototype.orderBy = "";
     
                         /**
-                         * UserEvent engine.
-                         * @member {string} engine
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * SearchInfo offset.
+                         * @member {number|null|undefined} offset
+                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
                          * @instance
                          */
-                        UserEvent.prototype.engine = "";
+                        SearchInfo.prototype.offset = null;
     
-                        /**
-                         * UserEvent dataStore.
-                         * @member {string} dataStore
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
-                         * @instance
-                         */
-                        UserEvent.prototype.dataStore = "";
+                        // OneOf field names bound to virtual getters and setters
+                        var $oneOfFields;
     
                         /**
-                         * UserEvent eventTime.
-                         * @member {google.protobuf.ITimestamp|null|undefined} eventTime
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * SearchInfo _offset.
+                         * @member {"offset"|undefined} _offset
+                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
                          * @instance
                          */
-                        UserEvent.prototype.eventTime = null;
+                        Object.defineProperty(SearchInfo.prototype, "_offset", {
+                            get: $util.oneOfGetter($oneOfFields = ["offset"]),
+                            set: $util.oneOfSetter($oneOfFields)
+                        });
     
                         /**
-                         * UserEvent userInfo.
-                         * @member {google.cloud.discoveryengine.v1.IUserInfo|null|undefined} userInfo
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
-                         * @instance
+                         * Creates a new SearchInfo instance using the specified properties.
+                         * @function create
+                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.ISearchInfo=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.SearchInfo} SearchInfo instance
                          */
-                        UserEvent.prototype.userInfo = null;
+                        SearchInfo.create = function create(properties) {
+                            return new SearchInfo(properties);
+                        };
     
                         /**
-                         * UserEvent directUserRequest.
-                         * @member {boolean} directUserRequest
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
-                         * @instance
+                         * Encodes the specified SearchInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchInfo.verify|verify} messages.
+                         * @function encode
+                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.ISearchInfo} message SearchInfo message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
                          */
-                        UserEvent.prototype.directUserRequest = false;
+                        SearchInfo.encode = function encode(message, writer) {
+                            if (!writer)
+                                writer = $Writer.create();
+                            if (message.searchQuery != null && Object.hasOwnProperty.call(message, "searchQuery"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.searchQuery);
+                            if (message.orderBy != null && Object.hasOwnProperty.call(message, "orderBy"))
+                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.orderBy);
+                            if (message.offset != null && Object.hasOwnProperty.call(message, "offset"))
+                                writer.uint32(/* id 3, wireType 0 =*/24).int32(message.offset);
+                            return writer;
+                        };
     
                         /**
-                         * UserEvent sessionId.
-                         * @member {string} sessionId
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
-                         * @instance
+                         * Encodes the specified SearchInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchInfo.verify|verify} messages.
+                         * @function encodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.ISearchInfo} message SearchInfo message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
                          */
-                        UserEvent.prototype.sessionId = "";
+                        SearchInfo.encodeDelimited = function encodeDelimited(message, writer) {
+                            return this.encode(message, writer).ldelim();
+                        };
     
                         /**
-                         * UserEvent pageInfo.
-                         * @member {google.cloud.discoveryengine.v1.IPageInfo|null|undefined} pageInfo
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
-                         * @instance
+                         * Decodes a SearchInfo message from the specified reader or buffer.
+                         * @function decode
+                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @param {number} [length] Message length if known beforehand
+                         * @returns {google.cloud.discoveryengine.v1.SearchInfo} SearchInfo
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        UserEvent.prototype.pageInfo = null;
+                        SearchInfo.decode = function decode(reader, length) {
+                            if (!(reader instanceof $Reader))
+                                reader = $Reader.create(reader);
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.SearchInfo();
+                            while (reader.pos < end) {
+                                var tag = reader.uint32();
+                                switch (tag >>> 3) {
+                                case 1: {
+                                        message.searchQuery = reader.string();
+                                        break;
+                                    }
+                                case 2: {
+                                        message.orderBy = reader.string();
+                                        break;
+                                    }
+                                case 3: {
+                                        message.offset = reader.int32();
+                                        break;
+                                    }
+                                default:
+                                    reader.skipType(tag & 7);
+                                    break;
+                                }
+                            }
+                            return message;
+                        };
     
                         /**
-                         * UserEvent attributionToken.
-                         * @member {string} attributionToken
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
-                         * @instance
+                         * Decodes a SearchInfo message from the specified reader or buffer, length delimited.
+                         * @function decodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @returns {google.cloud.discoveryengine.v1.SearchInfo} SearchInfo
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        UserEvent.prototype.attributionToken = "";
+                        SearchInfo.decodeDelimited = function decodeDelimited(reader) {
+                            if (!(reader instanceof $Reader))
+                                reader = new $Reader(reader);
+                            return this.decode(reader, reader.uint32());
+                        };
     
                         /**
-                         * UserEvent filter.
-                         * @member {string} filter
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
-                         * @instance
+                         * Verifies a SearchInfo message.
+                         * @function verify
+                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
+                         * @static
+                         * @param {Object.<string,*>} message Plain object to verify
+                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        UserEvent.prototype.filter = "";
+                        SearchInfo.verify = function verify(message) {
+                            if (typeof message !== "object" || message === null)
+                                return "object expected";
+                            var properties = {};
+                            if (message.searchQuery != null && message.hasOwnProperty("searchQuery"))
+                                if (!$util.isString(message.searchQuery))
+                                    return "searchQuery: string expected";
+                            if (message.orderBy != null && message.hasOwnProperty("orderBy"))
+                                if (!$util.isString(message.orderBy))
+                                    return "orderBy: string expected";
+                            if (message.offset != null && message.hasOwnProperty("offset")) {
+                                properties._offset = 1;
+                                if (!$util.isInteger(message.offset))
+                                    return "offset: integer expected";
+                            }
+                            return null;
+                        };
     
                         /**
-                         * UserEvent documents.
-                         * @member {Array.<google.cloud.discoveryengine.v1.IDocumentInfo>} documents
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
-                         * @instance
+                         * Creates a SearchInfo message from a plain object. Also converts values to their respective internal types.
+                         * @function fromObject
+                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
+                         * @static
+                         * @param {Object.<string,*>} object Plain object
+                         * @returns {google.cloud.discoveryengine.v1.SearchInfo} SearchInfo
                          */
-                        UserEvent.prototype.documents = $util.emptyArray;
+                        SearchInfo.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.SearchInfo)
+                                return object;
+                            var message = new $root.google.cloud.discoveryengine.v1.SearchInfo();
+                            if (object.searchQuery != null)
+                                message.searchQuery = String(object.searchQuery);
+                            if (object.orderBy != null)
+                                message.orderBy = String(object.orderBy);
+                            if (object.offset != null)
+                                message.offset = object.offset | 0;
+                            return message;
+                        };
     
                         /**
-                         * UserEvent panel.
-                         * @member {google.cloud.discoveryengine.v1.IPanelInfo|null|undefined} panel
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
-                         * @instance
+                         * Creates a plain object from a SearchInfo message. Also converts values to other types if specified.
+                         * @function toObject
+                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.SearchInfo} message SearchInfo
+                         * @param {$protobuf.IConversionOptions} [options] Conversion options
+                         * @returns {Object.<string,*>} Plain object
                          */
-                        UserEvent.prototype.panel = null;
+                        SearchInfo.toObject = function toObject(message, options) {
+                            if (!options)
+                                options = {};
+                            var object = {};
+                            if (options.defaults) {
+                                object.searchQuery = "";
+                                object.orderBy = "";
+                            }
+                            if (message.searchQuery != null && message.hasOwnProperty("searchQuery"))
+                                object.searchQuery = message.searchQuery;
+                            if (message.orderBy != null && message.hasOwnProperty("orderBy"))
+                                object.orderBy = message.orderBy;
+                            if (message.offset != null && message.hasOwnProperty("offset")) {
+                                object.offset = message.offset;
+                                if (options.oneofs)
+                                    object._offset = "offset";
+                            }
+                            return object;
+                        };
     
                         /**
-                         * UserEvent searchInfo.
-                         * @member {google.cloud.discoveryengine.v1.ISearchInfo|null|undefined} searchInfo
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * Converts this SearchInfo to JSON.
+                         * @function toJSON
+                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
                          * @instance
+                         * @returns {Object.<string,*>} JSON object
                          */
-                        UserEvent.prototype.searchInfo = null;
+                        SearchInfo.prototype.toJSON = function toJSON() {
+                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                        };
     
                         /**
-                         * UserEvent completionInfo.
-                         * @member {google.cloud.discoveryengine.v1.ICompletionInfo|null|undefined} completionInfo
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
-                         * @instance
+                         * Gets the default type url for SearchInfo
+                         * @function getTypeUrl
+                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
+                         * @static
+                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns {string} The default type url
                          */
-                        UserEvent.prototype.completionInfo = null;
+                        SearchInfo.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                            if (typeUrlPrefix === undefined) {
+                                typeUrlPrefix = "type.googleapis.com";
+                            }
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.SearchInfo";
+                        };
     
-                        /**
-                         * UserEvent transactionInfo.
-                         * @member {google.cloud.discoveryengine.v1.ITransactionInfo|null|undefined} transactionInfo
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
-                         * @instance
-                         */
-                        UserEvent.prototype.transactionInfo = null;
+                        return SearchInfo;
+                    })();
+    
+                    v1.CompletionInfo = (function() {
     
                         /**
-                         * UserEvent tagIds.
-                         * @member {Array.<string>} tagIds
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
-                         * @instance
+                         * Properties of a CompletionInfo.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @interface ICompletionInfo
+                         * @property {string|null} [selectedSuggestion] CompletionInfo selectedSuggestion
+                         * @property {number|null} [selectedPosition] CompletionInfo selectedPosition
                          */
-                        UserEvent.prototype.tagIds = $util.emptyArray;
     
                         /**
-                         * UserEvent promotionIds.
-                         * @member {Array.<string>} promotionIds
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
-                         * @instance
+                         * Constructs a new CompletionInfo.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @classdesc Represents a CompletionInfo.
+                         * @implements ICompletionInfo
+                         * @constructor
+                         * @param {google.cloud.discoveryengine.v1.ICompletionInfo=} [properties] Properties to set
                          */
-                        UserEvent.prototype.promotionIds = $util.emptyArray;
+                        function CompletionInfo(properties) {
+                            if (properties)
+                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                    if (properties[keys[i]] != null)
+                                        this[keys[i]] = properties[keys[i]];
+                        }
     
                         /**
-                         * UserEvent attributes.
-                         * @member {Object.<string,google.cloud.discoveryengine.v1.ICustomAttribute>} attributes
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * CompletionInfo selectedSuggestion.
+                         * @member {string} selectedSuggestion
+                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
                          * @instance
                          */
-                        UserEvent.prototype.attributes = $util.emptyObject;
+                        CompletionInfo.prototype.selectedSuggestion = "";
     
                         /**
-                         * UserEvent mediaInfo.
-                         * @member {google.cloud.discoveryengine.v1.IMediaInfo|null|undefined} mediaInfo
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * CompletionInfo selectedPosition.
+                         * @member {number} selectedPosition
+                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
                          * @instance
                          */
-                        UserEvent.prototype.mediaInfo = null;
+                        CompletionInfo.prototype.selectedPosition = 0;
     
                         /**
-                         * Creates a new UserEvent instance using the specified properties.
+                         * Creates a new CompletionInfo instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IUserEvent=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.UserEvent} UserEvent instance
+                         * @param {google.cloud.discoveryengine.v1.ICompletionInfo=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.CompletionInfo} CompletionInfo instance
                          */
-                        UserEvent.create = function create(properties) {
-                            return new UserEvent(properties);
+                        CompletionInfo.create = function create(properties) {
+                            return new CompletionInfo(properties);
                         };
     
                         /**
-                         * Encodes the specified UserEvent message. Does not implicitly {@link google.cloud.discoveryengine.v1.UserEvent.verify|verify} messages.
+                         * Encodes the specified CompletionInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.CompletionInfo.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IUserEvent} message UserEvent message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.ICompletionInfo} message CompletionInfo message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        UserEvent.encode = function encode(message, writer) {
+                        CompletionInfo.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.eventType != null && Object.hasOwnProperty.call(message, "eventType"))
-                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.eventType);
-                            if (message.userPseudoId != null && Object.hasOwnProperty.call(message, "userPseudoId"))
-                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.userPseudoId);
-                            if (message.eventTime != null && Object.hasOwnProperty.call(message, "eventTime"))
-                                $root.google.protobuf.Timestamp.encode(message.eventTime, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
-                            if (message.userInfo != null && Object.hasOwnProperty.call(message, "userInfo"))
-                                $root.google.cloud.discoveryengine.v1.UserInfo.encode(message.userInfo, writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
-                            if (message.directUserRequest != null && Object.hasOwnProperty.call(message, "directUserRequest"))
-                                writer.uint32(/* id 5, wireType 0 =*/40).bool(message.directUserRequest);
-                            if (message.sessionId != null && Object.hasOwnProperty.call(message, "sessionId"))
-                                writer.uint32(/* id 6, wireType 2 =*/50).string(message.sessionId);
-                            if (message.pageInfo != null && Object.hasOwnProperty.call(message, "pageInfo"))
-                                $root.google.cloud.discoveryengine.v1.PageInfo.encode(message.pageInfo, writer.uint32(/* id 7, wireType 2 =*/58).fork()).ldelim();
-                            if (message.attributionToken != null && Object.hasOwnProperty.call(message, "attributionToken"))
-                                writer.uint32(/* id 8, wireType 2 =*/66).string(message.attributionToken);
-                            if (message.filter != null && Object.hasOwnProperty.call(message, "filter"))
-                                writer.uint32(/* id 9, wireType 2 =*/74).string(message.filter);
-                            if (message.documents != null && message.documents.length)
-                                for (var i = 0; i < message.documents.length; ++i)
-                                    $root.google.cloud.discoveryengine.v1.DocumentInfo.encode(message.documents[i], writer.uint32(/* id 10, wireType 2 =*/82).fork()).ldelim();
-                            if (message.panel != null && Object.hasOwnProperty.call(message, "panel"))
-                                $root.google.cloud.discoveryengine.v1.PanelInfo.encode(message.panel, writer.uint32(/* id 11, wireType 2 =*/90).fork()).ldelim();
-                            if (message.searchInfo != null && Object.hasOwnProperty.call(message, "searchInfo"))
-                                $root.google.cloud.discoveryengine.v1.SearchInfo.encode(message.searchInfo, writer.uint32(/* id 12, wireType 2 =*/98).fork()).ldelim();
-                            if (message.completionInfo != null && Object.hasOwnProperty.call(message, "completionInfo"))
-                                $root.google.cloud.discoveryengine.v1.CompletionInfo.encode(message.completionInfo, writer.uint32(/* id 13, wireType 2 =*/106).fork()).ldelim();
-                            if (message.transactionInfo != null && Object.hasOwnProperty.call(message, "transactionInfo"))
-                                $root.google.cloud.discoveryengine.v1.TransactionInfo.encode(message.transactionInfo, writer.uint32(/* id 14, wireType 2 =*/114).fork()).ldelim();
-                            if (message.tagIds != null && message.tagIds.length)
-                                for (var i = 0; i < message.tagIds.length; ++i)
-                                    writer.uint32(/* id 15, wireType 2 =*/122).string(message.tagIds[i]);
-                            if (message.promotionIds != null && message.promotionIds.length)
-                                for (var i = 0; i < message.promotionIds.length; ++i)
-                                    writer.uint32(/* id 16, wireType 2 =*/130).string(message.promotionIds[i]);
-                            if (message.attributes != null && Object.hasOwnProperty.call(message, "attributes"))
-                                for (var keys = Object.keys(message.attributes), i = 0; i < keys.length; ++i) {
-                                    writer.uint32(/* id 17, wireType 2 =*/138).fork().uint32(/* id 1, wireType 2 =*/10).string(keys[i]);
-                                    $root.google.cloud.discoveryengine.v1.CustomAttribute.encode(message.attributes[keys[i]], writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim().ldelim();
-                                }
-                            if (message.mediaInfo != null && Object.hasOwnProperty.call(message, "mediaInfo"))
-                                $root.google.cloud.discoveryengine.v1.MediaInfo.encode(message.mediaInfo, writer.uint32(/* id 18, wireType 2 =*/146).fork()).ldelim();
-                            if (message.engine != null && Object.hasOwnProperty.call(message, "engine"))
-                                writer.uint32(/* id 19, wireType 2 =*/154).string(message.engine);
-                            if (message.dataStore != null && Object.hasOwnProperty.call(message, "dataStore"))
-                                writer.uint32(/* id 20, wireType 2 =*/162).string(message.dataStore);
+                            if (message.selectedSuggestion != null && Object.hasOwnProperty.call(message, "selectedSuggestion"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.selectedSuggestion);
+                            if (message.selectedPosition != null && Object.hasOwnProperty.call(message, "selectedPosition"))
+                                writer.uint32(/* id 2, wireType 0 =*/16).int32(message.selectedPosition);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified UserEvent message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.UserEvent.verify|verify} messages.
+                         * Encodes the specified CompletionInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.CompletionInfo.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IUserEvent} message UserEvent message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.ICompletionInfo} message CompletionInfo message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        UserEvent.encodeDelimited = function encodeDelimited(message, writer) {
+                        CompletionInfo.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a UserEvent message from the specified reader or buffer.
+                         * Decodes a CompletionInfo message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.UserEvent} UserEvent
+                         * @returns {google.cloud.discoveryengine.v1.CompletionInfo} CompletionInfo
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        UserEvent.decode = function decode(reader, length) {
+                        CompletionInfo.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.UserEvent(), key, value;
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.CompletionInfo();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 1: {
-                                        message.eventType = reader.string();
+                                        message.selectedSuggestion = reader.string();
                                         break;
                                     }
                                 case 2: {
-                                        message.userPseudoId = reader.string();
-                                        break;
-                                    }
-                                case 19: {
-                                        message.engine = reader.string();
-                                        break;
-                                    }
-                                case 20: {
-                                        message.dataStore = reader.string();
-                                        break;
-                                    }
-                                case 3: {
-                                        message.eventTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                case 4: {
-                                        message.userInfo = $root.google.cloud.discoveryengine.v1.UserInfo.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                case 5: {
-                                        message.directUserRequest = reader.bool();
-                                        break;
-                                    }
-                                case 6: {
-                                        message.sessionId = reader.string();
-                                        break;
-                                    }
-                                case 7: {
-                                        message.pageInfo = $root.google.cloud.discoveryengine.v1.PageInfo.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                case 8: {
-                                        message.attributionToken = reader.string();
-                                        break;
-                                    }
-                                case 9: {
-                                        message.filter = reader.string();
-                                        break;
-                                    }
-                                case 10: {
-                                        if (!(message.documents && message.documents.length))
-                                            message.documents = [];
-                                        message.documents.push($root.google.cloud.discoveryengine.v1.DocumentInfo.decode(reader, reader.uint32()));
-                                        break;
-                                    }
-                                case 11: {
-                                        message.panel = $root.google.cloud.discoveryengine.v1.PanelInfo.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                case 12: {
-                                        message.searchInfo = $root.google.cloud.discoveryengine.v1.SearchInfo.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                case 13: {
-                                        message.completionInfo = $root.google.cloud.discoveryengine.v1.CompletionInfo.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                case 14: {
-                                        message.transactionInfo = $root.google.cloud.discoveryengine.v1.TransactionInfo.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                case 15: {
-                                        if (!(message.tagIds && message.tagIds.length))
-                                            message.tagIds = [];
-                                        message.tagIds.push(reader.string());
-                                        break;
-                                    }
-                                case 16: {
-                                        if (!(message.promotionIds && message.promotionIds.length))
-                                            message.promotionIds = [];
-                                        message.promotionIds.push(reader.string());
-                                        break;
-                                    }
-                                case 17: {
-                                        if (message.attributes === $util.emptyObject)
-                                            message.attributes = {};
-                                        var end2 = reader.uint32() + reader.pos;
-                                        key = "";
-                                        value = null;
-                                        while (reader.pos < end2) {
-                                            var tag2 = reader.uint32();
-                                            switch (tag2 >>> 3) {
-                                            case 1:
-                                                key = reader.string();
-                                                break;
-                                            case 2:
-                                                value = $root.google.cloud.discoveryengine.v1.CustomAttribute.decode(reader, reader.uint32());
-                                                break;
-                                            default:
-                                                reader.skipType(tag2 & 7);
-                                                break;
-                                            }
-                                        }
-                                        message.attributes[key] = value;
-                                        break;
-                                    }
-                                case 18: {
-                                        message.mediaInfo = $root.google.cloud.discoveryengine.v1.MediaInfo.decode(reader, reader.uint32());
+                                        message.selectedPosition = reader.int32();
                                         break;
                                     }
                                 default:
@@ -15187,381 +19345,136 @@
                         };
     
                         /**
-                         * Decodes a UserEvent message from the specified reader or buffer, length delimited.
+                         * Decodes a CompletionInfo message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.UserEvent} UserEvent
+                         * @returns {google.cloud.discoveryengine.v1.CompletionInfo} CompletionInfo
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        UserEvent.decodeDelimited = function decodeDelimited(reader) {
+                        CompletionInfo.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a UserEvent message.
+                         * Verifies a CompletionInfo message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        UserEvent.verify = function verify(message) {
+                        CompletionInfo.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            if (message.eventType != null && message.hasOwnProperty("eventType"))
-                                if (!$util.isString(message.eventType))
-                                    return "eventType: string expected";
-                            if (message.userPseudoId != null && message.hasOwnProperty("userPseudoId"))
-                                if (!$util.isString(message.userPseudoId))
-                                    return "userPseudoId: string expected";
-                            if (message.engine != null && message.hasOwnProperty("engine"))
-                                if (!$util.isString(message.engine))
-                                    return "engine: string expected";
-                            if (message.dataStore != null && message.hasOwnProperty("dataStore"))
-                                if (!$util.isString(message.dataStore))
-                                    return "dataStore: string expected";
-                            if (message.eventTime != null && message.hasOwnProperty("eventTime")) {
-                                var error = $root.google.protobuf.Timestamp.verify(message.eventTime);
-                                if (error)
-                                    return "eventTime." + error;
-                            }
-                            if (message.userInfo != null && message.hasOwnProperty("userInfo")) {
-                                var error = $root.google.cloud.discoveryengine.v1.UserInfo.verify(message.userInfo);
-                                if (error)
-                                    return "userInfo." + error;
-                            }
-                            if (message.directUserRequest != null && message.hasOwnProperty("directUserRequest"))
-                                if (typeof message.directUserRequest !== "boolean")
-                                    return "directUserRequest: boolean expected";
-                            if (message.sessionId != null && message.hasOwnProperty("sessionId"))
-                                if (!$util.isString(message.sessionId))
-                                    return "sessionId: string expected";
-                            if (message.pageInfo != null && message.hasOwnProperty("pageInfo")) {
-                                var error = $root.google.cloud.discoveryengine.v1.PageInfo.verify(message.pageInfo);
-                                if (error)
-                                    return "pageInfo." + error;
-                            }
-                            if (message.attributionToken != null && message.hasOwnProperty("attributionToken"))
-                                if (!$util.isString(message.attributionToken))
-                                    return "attributionToken: string expected";
-                            if (message.filter != null && message.hasOwnProperty("filter"))
-                                if (!$util.isString(message.filter))
-                                    return "filter: string expected";
-                            if (message.documents != null && message.hasOwnProperty("documents")) {
-                                if (!Array.isArray(message.documents))
-                                    return "documents: array expected";
-                                for (var i = 0; i < message.documents.length; ++i) {
-                                    var error = $root.google.cloud.discoveryengine.v1.DocumentInfo.verify(message.documents[i]);
-                                    if (error)
-                                        return "documents." + error;
-                                }
-                            }
-                            if (message.panel != null && message.hasOwnProperty("panel")) {
-                                var error = $root.google.cloud.discoveryengine.v1.PanelInfo.verify(message.panel);
-                                if (error)
-                                    return "panel." + error;
-                            }
-                            if (message.searchInfo != null && message.hasOwnProperty("searchInfo")) {
-                                var error = $root.google.cloud.discoveryengine.v1.SearchInfo.verify(message.searchInfo);
-                                if (error)
-                                    return "searchInfo." + error;
-                            }
-                            if (message.completionInfo != null && message.hasOwnProperty("completionInfo")) {
-                                var error = $root.google.cloud.discoveryengine.v1.CompletionInfo.verify(message.completionInfo);
-                                if (error)
-                                    return "completionInfo." + error;
-                            }
-                            if (message.transactionInfo != null && message.hasOwnProperty("transactionInfo")) {
-                                var error = $root.google.cloud.discoveryengine.v1.TransactionInfo.verify(message.transactionInfo);
-                                if (error)
-                                    return "transactionInfo." + error;
-                            }
-                            if (message.tagIds != null && message.hasOwnProperty("tagIds")) {
-                                if (!Array.isArray(message.tagIds))
-                                    return "tagIds: array expected";
-                                for (var i = 0; i < message.tagIds.length; ++i)
-                                    if (!$util.isString(message.tagIds[i]))
-                                        return "tagIds: string[] expected";
-                            }
-                            if (message.promotionIds != null && message.hasOwnProperty("promotionIds")) {
-                                if (!Array.isArray(message.promotionIds))
-                                    return "promotionIds: array expected";
-                                for (var i = 0; i < message.promotionIds.length; ++i)
-                                    if (!$util.isString(message.promotionIds[i]))
-                                        return "promotionIds: string[] expected";
-                            }
-                            if (message.attributes != null && message.hasOwnProperty("attributes")) {
-                                if (!$util.isObject(message.attributes))
-                                    return "attributes: object expected";
-                                var key = Object.keys(message.attributes);
-                                for (var i = 0; i < key.length; ++i) {
-                                    var error = $root.google.cloud.discoveryengine.v1.CustomAttribute.verify(message.attributes[key[i]]);
-                                    if (error)
-                                        return "attributes." + error;
-                                }
-                            }
-                            if (message.mediaInfo != null && message.hasOwnProperty("mediaInfo")) {
-                                var error = $root.google.cloud.discoveryengine.v1.MediaInfo.verify(message.mediaInfo);
-                                if (error)
-                                    return "mediaInfo." + error;
-                            }
+                            if (message.selectedSuggestion != null && message.hasOwnProperty("selectedSuggestion"))
+                                if (!$util.isString(message.selectedSuggestion))
+                                    return "selectedSuggestion: string expected";
+                            if (message.selectedPosition != null && message.hasOwnProperty("selectedPosition"))
+                                if (!$util.isInteger(message.selectedPosition))
+                                    return "selectedPosition: integer expected";
                             return null;
                         };
     
                         /**
-                         * Creates a UserEvent message from a plain object. Also converts values to their respective internal types.
+                         * Creates a CompletionInfo message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.UserEvent} UserEvent
-                         */
-                        UserEvent.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.UserEvent)
-                                return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.UserEvent();
-                            if (object.eventType != null)
-                                message.eventType = String(object.eventType);
-                            if (object.userPseudoId != null)
-                                message.userPseudoId = String(object.userPseudoId);
-                            if (object.engine != null)
-                                message.engine = String(object.engine);
-                            if (object.dataStore != null)
-                                message.dataStore = String(object.dataStore);
-                            if (object.eventTime != null) {
-                                if (typeof object.eventTime !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.eventTime: object expected");
-                                message.eventTime = $root.google.protobuf.Timestamp.fromObject(object.eventTime);
-                            }
-                            if (object.userInfo != null) {
-                                if (typeof object.userInfo !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.userInfo: object expected");
-                                message.userInfo = $root.google.cloud.discoveryengine.v1.UserInfo.fromObject(object.userInfo);
-                            }
-                            if (object.directUserRequest != null)
-                                message.directUserRequest = Boolean(object.directUserRequest);
-                            if (object.sessionId != null)
-                                message.sessionId = String(object.sessionId);
-                            if (object.pageInfo != null) {
-                                if (typeof object.pageInfo !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.pageInfo: object expected");
-                                message.pageInfo = $root.google.cloud.discoveryengine.v1.PageInfo.fromObject(object.pageInfo);
-                            }
-                            if (object.attributionToken != null)
-                                message.attributionToken = String(object.attributionToken);
-                            if (object.filter != null)
-                                message.filter = String(object.filter);
-                            if (object.documents) {
-                                if (!Array.isArray(object.documents))
-                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.documents: array expected");
-                                message.documents = [];
-                                for (var i = 0; i < object.documents.length; ++i) {
-                                    if (typeof object.documents[i] !== "object")
-                                        throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.documents: object expected");
-                                    message.documents[i] = $root.google.cloud.discoveryengine.v1.DocumentInfo.fromObject(object.documents[i]);
-                                }
-                            }
-                            if (object.panel != null) {
-                                if (typeof object.panel !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.panel: object expected");
-                                message.panel = $root.google.cloud.discoveryengine.v1.PanelInfo.fromObject(object.panel);
-                            }
-                            if (object.searchInfo != null) {
-                                if (typeof object.searchInfo !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.searchInfo: object expected");
-                                message.searchInfo = $root.google.cloud.discoveryengine.v1.SearchInfo.fromObject(object.searchInfo);
-                            }
-                            if (object.completionInfo != null) {
-                                if (typeof object.completionInfo !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.completionInfo: object expected");
-                                message.completionInfo = $root.google.cloud.discoveryengine.v1.CompletionInfo.fromObject(object.completionInfo);
-                            }
-                            if (object.transactionInfo != null) {
-                                if (typeof object.transactionInfo !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.transactionInfo: object expected");
-                                message.transactionInfo = $root.google.cloud.discoveryengine.v1.TransactionInfo.fromObject(object.transactionInfo);
-                            }
-                            if (object.tagIds) {
-                                if (!Array.isArray(object.tagIds))
-                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.tagIds: array expected");
-                                message.tagIds = [];
-                                for (var i = 0; i < object.tagIds.length; ++i)
-                                    message.tagIds[i] = String(object.tagIds[i]);
-                            }
-                            if (object.promotionIds) {
-                                if (!Array.isArray(object.promotionIds))
-                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.promotionIds: array expected");
-                                message.promotionIds = [];
-                                for (var i = 0; i < object.promotionIds.length; ++i)
-                                    message.promotionIds[i] = String(object.promotionIds[i]);
-                            }
-                            if (object.attributes) {
-                                if (typeof object.attributes !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.attributes: object expected");
-                                message.attributes = {};
-                                for (var keys = Object.keys(object.attributes), i = 0; i < keys.length; ++i) {
-                                    if (typeof object.attributes[keys[i]] !== "object")
-                                        throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.attributes: object expected");
-                                    message.attributes[keys[i]] = $root.google.cloud.discoveryengine.v1.CustomAttribute.fromObject(object.attributes[keys[i]]);
-                                }
-                            }
-                            if (object.mediaInfo != null) {
-                                if (typeof object.mediaInfo !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.UserEvent.mediaInfo: object expected");
-                                message.mediaInfo = $root.google.cloud.discoveryengine.v1.MediaInfo.fromObject(object.mediaInfo);
-                            }
-                            return message;
-                        };
-    
-                        /**
-                         * Creates a plain object from a UserEvent message. Also converts values to other types if specified.
-                         * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
-                         * @static
-                         * @param {google.cloud.discoveryengine.v1.UserEvent} message UserEvent
-                         * @param {$protobuf.IConversionOptions} [options] Conversion options
-                         * @returns {Object.<string,*>} Plain object
+                         * @returns {google.cloud.discoveryengine.v1.CompletionInfo} CompletionInfo
                          */
-                        UserEvent.toObject = function toObject(message, options) {
-                            if (!options)
-                                options = {};
-                            var object = {};
-                            if (options.arrays || options.defaults) {
-                                object.documents = [];
-                                object.tagIds = [];
-                                object.promotionIds = [];
-                            }
-                            if (options.objects || options.defaults)
-                                object.attributes = {};
-                            if (options.defaults) {
-                                object.eventType = "";
-                                object.userPseudoId = "";
-                                object.eventTime = null;
-                                object.userInfo = null;
-                                object.directUserRequest = false;
-                                object.sessionId = "";
-                                object.pageInfo = null;
-                                object.attributionToken = "";
-                                object.filter = "";
-                                object.panel = null;
-                                object.searchInfo = null;
-                                object.completionInfo = null;
-                                object.transactionInfo = null;
-                                object.mediaInfo = null;
-                                object.engine = "";
-                                object.dataStore = "";
-                            }
-                            if (message.eventType != null && message.hasOwnProperty("eventType"))
-                                object.eventType = message.eventType;
-                            if (message.userPseudoId != null && message.hasOwnProperty("userPseudoId"))
-                                object.userPseudoId = message.userPseudoId;
-                            if (message.eventTime != null && message.hasOwnProperty("eventTime"))
-                                object.eventTime = $root.google.protobuf.Timestamp.toObject(message.eventTime, options);
-                            if (message.userInfo != null && message.hasOwnProperty("userInfo"))
-                                object.userInfo = $root.google.cloud.discoveryengine.v1.UserInfo.toObject(message.userInfo, options);
-                            if (message.directUserRequest != null && message.hasOwnProperty("directUserRequest"))
-                                object.directUserRequest = message.directUserRequest;
-                            if (message.sessionId != null && message.hasOwnProperty("sessionId"))
-                                object.sessionId = message.sessionId;
-                            if (message.pageInfo != null && message.hasOwnProperty("pageInfo"))
-                                object.pageInfo = $root.google.cloud.discoveryengine.v1.PageInfo.toObject(message.pageInfo, options);
-                            if (message.attributionToken != null && message.hasOwnProperty("attributionToken"))
-                                object.attributionToken = message.attributionToken;
-                            if (message.filter != null && message.hasOwnProperty("filter"))
-                                object.filter = message.filter;
-                            if (message.documents && message.documents.length) {
-                                object.documents = [];
-                                for (var j = 0; j < message.documents.length; ++j)
-                                    object.documents[j] = $root.google.cloud.discoveryengine.v1.DocumentInfo.toObject(message.documents[j], options);
-                            }
-                            if (message.panel != null && message.hasOwnProperty("panel"))
-                                object.panel = $root.google.cloud.discoveryengine.v1.PanelInfo.toObject(message.panel, options);
-                            if (message.searchInfo != null && message.hasOwnProperty("searchInfo"))
-                                object.searchInfo = $root.google.cloud.discoveryengine.v1.SearchInfo.toObject(message.searchInfo, options);
-                            if (message.completionInfo != null && message.hasOwnProperty("completionInfo"))
-                                object.completionInfo = $root.google.cloud.discoveryengine.v1.CompletionInfo.toObject(message.completionInfo, options);
-                            if (message.transactionInfo != null && message.hasOwnProperty("transactionInfo"))
-                                object.transactionInfo = $root.google.cloud.discoveryengine.v1.TransactionInfo.toObject(message.transactionInfo, options);
-                            if (message.tagIds && message.tagIds.length) {
-                                object.tagIds = [];
-                                for (var j = 0; j < message.tagIds.length; ++j)
-                                    object.tagIds[j] = message.tagIds[j];
-                            }
-                            if (message.promotionIds && message.promotionIds.length) {
-                                object.promotionIds = [];
-                                for (var j = 0; j < message.promotionIds.length; ++j)
-                                    object.promotionIds[j] = message.promotionIds[j];
-                            }
-                            var keys2;
-                            if (message.attributes && (keys2 = Object.keys(message.attributes)).length) {
-                                object.attributes = {};
-                                for (var j = 0; j < keys2.length; ++j)
-                                    object.attributes[keys2[j]] = $root.google.cloud.discoveryengine.v1.CustomAttribute.toObject(message.attributes[keys2[j]], options);
+                        CompletionInfo.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.CompletionInfo)
+                                return object;
+                            var message = new $root.google.cloud.discoveryengine.v1.CompletionInfo();
+                            if (object.selectedSuggestion != null)
+                                message.selectedSuggestion = String(object.selectedSuggestion);
+                            if (object.selectedPosition != null)
+                                message.selectedPosition = object.selectedPosition | 0;
+                            return message;
+                        };
+    
+                        /**
+                         * Creates a plain object from a CompletionInfo message. Also converts values to other types if specified.
+                         * @function toObject
+                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.CompletionInfo} message CompletionInfo
+                         * @param {$protobuf.IConversionOptions} [options] Conversion options
+                         * @returns {Object.<string,*>} Plain object
+                         */
+                        CompletionInfo.toObject = function toObject(message, options) {
+                            if (!options)
+                                options = {};
+                            var object = {};
+                            if (options.defaults) {
+                                object.selectedSuggestion = "";
+                                object.selectedPosition = 0;
                             }
-                            if (message.mediaInfo != null && message.hasOwnProperty("mediaInfo"))
-                                object.mediaInfo = $root.google.cloud.discoveryengine.v1.MediaInfo.toObject(message.mediaInfo, options);
-                            if (message.engine != null && message.hasOwnProperty("engine"))
-                                object.engine = message.engine;
-                            if (message.dataStore != null && message.hasOwnProperty("dataStore"))
-                                object.dataStore = message.dataStore;
+                            if (message.selectedSuggestion != null && message.hasOwnProperty("selectedSuggestion"))
+                                object.selectedSuggestion = message.selectedSuggestion;
+                            if (message.selectedPosition != null && message.hasOwnProperty("selectedPosition"))
+                                object.selectedPosition = message.selectedPosition;
                             return object;
                         };
     
                         /**
-                         * Converts this UserEvent to JSON.
+                         * Converts this CompletionInfo to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        UserEvent.prototype.toJSON = function toJSON() {
+                        CompletionInfo.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for UserEvent
+                         * Gets the default type url for CompletionInfo
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.UserEvent
+                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        UserEvent.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        CompletionInfo.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.UserEvent";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.CompletionInfo";
                         };
     
-                        return UserEvent;
+                        return CompletionInfo;
                     })();
     
-                    v1.PageInfo = (function() {
+                    v1.TransactionInfo = (function() {
     
                         /**
-                         * Properties of a PageInfo.
+                         * Properties of a TransactionInfo.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IPageInfo
-                         * @property {string|null} [pageviewId] PageInfo pageviewId
-                         * @property {string|null} [pageCategory] PageInfo pageCategory
-                         * @property {string|null} [uri] PageInfo uri
-                         * @property {string|null} [referrerUri] PageInfo referrerUri
+                         * @interface ITransactionInfo
+                         * @property {number|null} [value] TransactionInfo value
+                         * @property {string|null} [currency] TransactionInfo currency
+                         * @property {string|null} [transactionId] TransactionInfo transactionId
+                         * @property {number|null} [tax] TransactionInfo tax
+                         * @property {number|null} [cost] TransactionInfo cost
+                         * @property {number|null} [discountValue] TransactionInfo discountValue
                          */
     
                         /**
-                         * Constructs a new PageInfo.
+                         * Constructs a new TransactionInfo.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a PageInfo.
-                         * @implements IPageInfo
+                         * @classdesc Represents a TransactionInfo.
+                         * @implements ITransactionInfo
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IPageInfo=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.ITransactionInfo=} [properties] Properties to set
                          */
-                        function PageInfo(properties) {
+                        function TransactionInfo(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -15569,117 +19482,192 @@
                         }
     
                         /**
-                         * PageInfo pageviewId.
-                         * @member {string} pageviewId
-                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * TransactionInfo value.
+                         * @member {number|null|undefined} value
+                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
                          * @instance
                          */
-                        PageInfo.prototype.pageviewId = "";
+                        TransactionInfo.prototype.value = null;
     
                         /**
-                         * PageInfo pageCategory.
-                         * @member {string} pageCategory
-                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * TransactionInfo currency.
+                         * @member {string} currency
+                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
                          * @instance
                          */
-                        PageInfo.prototype.pageCategory = "";
+                        TransactionInfo.prototype.currency = "";
     
                         /**
-                         * PageInfo uri.
-                         * @member {string} uri
-                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * TransactionInfo transactionId.
+                         * @member {string} transactionId
+                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
                          * @instance
                          */
-                        PageInfo.prototype.uri = "";
+                        TransactionInfo.prototype.transactionId = "";
     
                         /**
-                         * PageInfo referrerUri.
-                         * @member {string} referrerUri
-                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * TransactionInfo tax.
+                         * @member {number|null|undefined} tax
+                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
                          * @instance
                          */
-                        PageInfo.prototype.referrerUri = "";
+                        TransactionInfo.prototype.tax = null;
     
                         /**
-                         * Creates a new PageInfo instance using the specified properties.
+                         * TransactionInfo cost.
+                         * @member {number|null|undefined} cost
+                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
+                         * @instance
+                         */
+                        TransactionInfo.prototype.cost = null;
+    
+                        /**
+                         * TransactionInfo discountValue.
+                         * @member {number|null|undefined} discountValue
+                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
+                         * @instance
+                         */
+                        TransactionInfo.prototype.discountValue = null;
+    
+                        // OneOf field names bound to virtual getters and setters
+                        var $oneOfFields;
+    
+                        /**
+                         * TransactionInfo _value.
+                         * @member {"value"|undefined} _value
+                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
+                         * @instance
+                         */
+                        Object.defineProperty(TransactionInfo.prototype, "_value", {
+                            get: $util.oneOfGetter($oneOfFields = ["value"]),
+                            set: $util.oneOfSetter($oneOfFields)
+                        });
+    
+                        /**
+                         * TransactionInfo _tax.
+                         * @member {"tax"|undefined} _tax
+                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
+                         * @instance
+                         */
+                        Object.defineProperty(TransactionInfo.prototype, "_tax", {
+                            get: $util.oneOfGetter($oneOfFields = ["tax"]),
+                            set: $util.oneOfSetter($oneOfFields)
+                        });
+    
+                        /**
+                         * TransactionInfo _cost.
+                         * @member {"cost"|undefined} _cost
+                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
+                         * @instance
+                         */
+                        Object.defineProperty(TransactionInfo.prototype, "_cost", {
+                            get: $util.oneOfGetter($oneOfFields = ["cost"]),
+                            set: $util.oneOfSetter($oneOfFields)
+                        });
+    
+                        /**
+                         * TransactionInfo _discountValue.
+                         * @member {"discountValue"|undefined} _discountValue
+                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
+                         * @instance
+                         */
+                        Object.defineProperty(TransactionInfo.prototype, "_discountValue", {
+                            get: $util.oneOfGetter($oneOfFields = ["discountValue"]),
+                            set: $util.oneOfSetter($oneOfFields)
+                        });
+    
+                        /**
+                         * Creates a new TransactionInfo instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPageInfo=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.PageInfo} PageInfo instance
+                         * @param {google.cloud.discoveryengine.v1.ITransactionInfo=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.TransactionInfo} TransactionInfo instance
                          */
-                        PageInfo.create = function create(properties) {
-                            return new PageInfo(properties);
+                        TransactionInfo.create = function create(properties) {
+                            return new TransactionInfo(properties);
                         };
     
                         /**
-                         * Encodes the specified PageInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.PageInfo.verify|verify} messages.
+                         * Encodes the specified TransactionInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.TransactionInfo.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPageInfo} message PageInfo message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.ITransactionInfo} message TransactionInfo message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        PageInfo.encode = function encode(message, writer) {
+                        TransactionInfo.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.pageviewId != null && Object.hasOwnProperty.call(message, "pageviewId"))
-                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.pageviewId);
-                            if (message.pageCategory != null && Object.hasOwnProperty.call(message, "pageCategory"))
-                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.pageCategory);
-                            if (message.uri != null && Object.hasOwnProperty.call(message, "uri"))
-                                writer.uint32(/* id 3, wireType 2 =*/26).string(message.uri);
-                            if (message.referrerUri != null && Object.hasOwnProperty.call(message, "referrerUri"))
-                                writer.uint32(/* id 4, wireType 2 =*/34).string(message.referrerUri);
+                            if (message.value != null && Object.hasOwnProperty.call(message, "value"))
+                                writer.uint32(/* id 1, wireType 5 =*/13).float(message.value);
+                            if (message.currency != null && Object.hasOwnProperty.call(message, "currency"))
+                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.currency);
+                            if (message.transactionId != null && Object.hasOwnProperty.call(message, "transactionId"))
+                                writer.uint32(/* id 3, wireType 2 =*/26).string(message.transactionId);
+                            if (message.tax != null && Object.hasOwnProperty.call(message, "tax"))
+                                writer.uint32(/* id 4, wireType 5 =*/37).float(message.tax);
+                            if (message.cost != null && Object.hasOwnProperty.call(message, "cost"))
+                                writer.uint32(/* id 5, wireType 5 =*/45).float(message.cost);
+                            if (message.discountValue != null && Object.hasOwnProperty.call(message, "discountValue"))
+                                writer.uint32(/* id 6, wireType 5 =*/53).float(message.discountValue);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified PageInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PageInfo.verify|verify} messages.
+                         * Encodes the specified TransactionInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.TransactionInfo.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPageInfo} message PageInfo message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.ITransactionInfo} message TransactionInfo message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        PageInfo.encodeDelimited = function encodeDelimited(message, writer) {
+                        TransactionInfo.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a PageInfo message from the specified reader or buffer.
+                         * Decodes a TransactionInfo message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.PageInfo} PageInfo
+                         * @returns {google.cloud.discoveryengine.v1.TransactionInfo} TransactionInfo
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        PageInfo.decode = function decode(reader, length) {
+                        TransactionInfo.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.PageInfo();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.TransactionInfo();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 1: {
-                                        message.pageviewId = reader.string();
+                                        message.value = reader.float();
                                         break;
                                     }
                                 case 2: {
-                                        message.pageCategory = reader.string();
+                                        message.currency = reader.string();
                                         break;
                                     }
                                 case 3: {
-                                        message.uri = reader.string();
+                                        message.transactionId = reader.string();
                                         break;
                                     }
                                 case 4: {
-                                        message.referrerUri = reader.string();
+                                        message.tax = reader.float();
+                                        break;
+                                    }
+                                case 5: {
+                                        message.cost = reader.float();
+                                        break;
+                                    }
+                                case 6: {
+                                        message.discountValue = reader.float();
                                         break;
                                     }
                                 default:
@@ -15691,149 +19679,185 @@
                         };
     
                         /**
-                         * Decodes a PageInfo message from the specified reader or buffer, length delimited.
+                         * Decodes a TransactionInfo message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.PageInfo} PageInfo
+                         * @returns {google.cloud.discoveryengine.v1.TransactionInfo} TransactionInfo
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        PageInfo.decodeDelimited = function decodeDelimited(reader) {
+                        TransactionInfo.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a PageInfo message.
+                         * Verifies a TransactionInfo message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        PageInfo.verify = function verify(message) {
+                        TransactionInfo.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            if (message.pageviewId != null && message.hasOwnProperty("pageviewId"))
-                                if (!$util.isString(message.pageviewId))
-                                    return "pageviewId: string expected";
-                            if (message.pageCategory != null && message.hasOwnProperty("pageCategory"))
-                                if (!$util.isString(message.pageCategory))
-                                    return "pageCategory: string expected";
-                            if (message.uri != null && message.hasOwnProperty("uri"))
-                                if (!$util.isString(message.uri))
-                                    return "uri: string expected";
-                            if (message.referrerUri != null && message.hasOwnProperty("referrerUri"))
-                                if (!$util.isString(message.referrerUri))
-                                    return "referrerUri: string expected";
+                            var properties = {};
+                            if (message.value != null && message.hasOwnProperty("value")) {
+                                properties._value = 1;
+                                if (typeof message.value !== "number")
+                                    return "value: number expected";
+                            }
+                            if (message.currency != null && message.hasOwnProperty("currency"))
+                                if (!$util.isString(message.currency))
+                                    return "currency: string expected";
+                            if (message.transactionId != null && message.hasOwnProperty("transactionId"))
+                                if (!$util.isString(message.transactionId))
+                                    return "transactionId: string expected";
+                            if (message.tax != null && message.hasOwnProperty("tax")) {
+                                properties._tax = 1;
+                                if (typeof message.tax !== "number")
+                                    return "tax: number expected";
+                            }
+                            if (message.cost != null && message.hasOwnProperty("cost")) {
+                                properties._cost = 1;
+                                if (typeof message.cost !== "number")
+                                    return "cost: number expected";
+                            }
+                            if (message.discountValue != null && message.hasOwnProperty("discountValue")) {
+                                properties._discountValue = 1;
+                                if (typeof message.discountValue !== "number")
+                                    return "discountValue: number expected";
+                            }
                             return null;
                         };
     
                         /**
-                         * Creates a PageInfo message from a plain object. Also converts values to their respective internal types.
+                         * Creates a TransactionInfo message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.PageInfo} PageInfo
+                         * @returns {google.cloud.discoveryengine.v1.TransactionInfo} TransactionInfo
                          */
-                        PageInfo.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.PageInfo)
+                        TransactionInfo.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.TransactionInfo)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.PageInfo();
-                            if (object.pageviewId != null)
-                                message.pageviewId = String(object.pageviewId);
-                            if (object.pageCategory != null)
-                                message.pageCategory = String(object.pageCategory);
-                            if (object.uri != null)
-                                message.uri = String(object.uri);
-                            if (object.referrerUri != null)
-                                message.referrerUri = String(object.referrerUri);
+                            var message = new $root.google.cloud.discoveryengine.v1.TransactionInfo();
+                            if (object.value != null)
+                                message.value = Number(object.value);
+                            if (object.currency != null)
+                                message.currency = String(object.currency);
+                            if (object.transactionId != null)
+                                message.transactionId = String(object.transactionId);
+                            if (object.tax != null)
+                                message.tax = Number(object.tax);
+                            if (object.cost != null)
+                                message.cost = Number(object.cost);
+                            if (object.discountValue != null)
+                                message.discountValue = Number(object.discountValue);
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a PageInfo message. Also converts values to other types if specified.
+                         * Creates a plain object from a TransactionInfo message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.PageInfo} message PageInfo
+                         * @param {google.cloud.discoveryengine.v1.TransactionInfo} message TransactionInfo
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        PageInfo.toObject = function toObject(message, options) {
+                        TransactionInfo.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
                             if (options.defaults) {
-                                object.pageviewId = "";
-                                object.pageCategory = "";
-                                object.uri = "";
-                                object.referrerUri = "";
+                                object.currency = "";
+                                object.transactionId = "";
+                            }
+                            if (message.value != null && message.hasOwnProperty("value")) {
+                                object.value = options.json && !isFinite(message.value) ? String(message.value) : message.value;
+                                if (options.oneofs)
+                                    object._value = "value";
+                            }
+                            if (message.currency != null && message.hasOwnProperty("currency"))
+                                object.currency = message.currency;
+                            if (message.transactionId != null && message.hasOwnProperty("transactionId"))
+                                object.transactionId = message.transactionId;
+                            if (message.tax != null && message.hasOwnProperty("tax")) {
+                                object.tax = options.json && !isFinite(message.tax) ? String(message.tax) : message.tax;
+                                if (options.oneofs)
+                                    object._tax = "tax";
+                            }
+                            if (message.cost != null && message.hasOwnProperty("cost")) {
+                                object.cost = options.json && !isFinite(message.cost) ? String(message.cost) : message.cost;
+                                if (options.oneofs)
+                                    object._cost = "cost";
+                            }
+                            if (message.discountValue != null && message.hasOwnProperty("discountValue")) {
+                                object.discountValue = options.json && !isFinite(message.discountValue) ? String(message.discountValue) : message.discountValue;
+                                if (options.oneofs)
+                                    object._discountValue = "discountValue";
                             }
-                            if (message.pageviewId != null && message.hasOwnProperty("pageviewId"))
-                                object.pageviewId = message.pageviewId;
-                            if (message.pageCategory != null && message.hasOwnProperty("pageCategory"))
-                                object.pageCategory = message.pageCategory;
-                            if (message.uri != null && message.hasOwnProperty("uri"))
-                                object.uri = message.uri;
-                            if (message.referrerUri != null && message.hasOwnProperty("referrerUri"))
-                                object.referrerUri = message.referrerUri;
                             return object;
                         };
     
                         /**
-                         * Converts this PageInfo to JSON.
+                         * Converts this TransactionInfo to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        PageInfo.prototype.toJSON = function toJSON() {
+                        TransactionInfo.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for PageInfo
+                         * Gets the default type url for TransactionInfo
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.PageInfo
+                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        PageInfo.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        TransactionInfo.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.PageInfo";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.TransactionInfo";
                         };
     
-                        return PageInfo;
+                        return TransactionInfo;
                     })();
     
-                    v1.SearchInfo = (function() {
+                    v1.DocumentInfo = (function() {
     
                         /**
-                         * Properties of a SearchInfo.
+                         * Properties of a DocumentInfo.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface ISearchInfo
-                         * @property {string|null} [searchQuery] SearchInfo searchQuery
-                         * @property {string|null} [orderBy] SearchInfo orderBy
-                         * @property {number|null} [offset] SearchInfo offset
+                         * @interface IDocumentInfo
+                         * @property {string|null} [id] DocumentInfo id
+                         * @property {string|null} [name] DocumentInfo name
+                         * @property {string|null} [uri] DocumentInfo uri
+                         * @property {number|null} [quantity] DocumentInfo quantity
+                         * @property {Array.<string>|null} [promotionIds] DocumentInfo promotionIds
                          */
     
                         /**
-                         * Constructs a new SearchInfo.
+                         * Constructs a new DocumentInfo.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a SearchInfo.
-                         * @implements ISearchInfo
+                         * @classdesc Represents a DocumentInfo.
+                         * @implements IDocumentInfo
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.ISearchInfo=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IDocumentInfo=} [properties] Properties to set
                          */
-                        function SearchInfo(properties) {
+                        function DocumentInfo(properties) {
+                            this.promotionIds = [];
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -15841,117 +19865,159 @@
                         }
     
                         /**
-                         * SearchInfo searchQuery.
-                         * @member {string} searchQuery
-                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
+                         * DocumentInfo id.
+                         * @member {string|null|undefined} id
+                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
                          * @instance
                          */
-                        SearchInfo.prototype.searchQuery = "";
+                        DocumentInfo.prototype.id = null;
     
                         /**
-                         * SearchInfo orderBy.
-                         * @member {string} orderBy
-                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
+                         * DocumentInfo name.
+                         * @member {string|null|undefined} name
+                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
                          * @instance
                          */
-                        SearchInfo.prototype.orderBy = "";
+                        DocumentInfo.prototype.name = null;
     
                         /**
-                         * SearchInfo offset.
-                         * @member {number|null|undefined} offset
-                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
+                         * DocumentInfo uri.
+                         * @member {string|null|undefined} uri
+                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
                          * @instance
                          */
-                        SearchInfo.prototype.offset = null;
+                        DocumentInfo.prototype.uri = null;
+    
+                        /**
+                         * DocumentInfo quantity.
+                         * @member {number|null|undefined} quantity
+                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
+                         * @instance
+                         */
+                        DocumentInfo.prototype.quantity = null;
+    
+                        /**
+                         * DocumentInfo promotionIds.
+                         * @member {Array.<string>} promotionIds
+                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
+                         * @instance
+                         */
+                        DocumentInfo.prototype.promotionIds = $util.emptyArray;
     
                         // OneOf field names bound to virtual getters and setters
                         var $oneOfFields;
     
                         /**
-                         * SearchInfo _offset.
-                         * @member {"offset"|undefined} _offset
-                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
+                         * DocumentInfo documentDescriptor.
+                         * @member {"id"|"name"|"uri"|undefined} documentDescriptor
+                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
                          * @instance
                          */
-                        Object.defineProperty(SearchInfo.prototype, "_offset", {
-                            get: $util.oneOfGetter($oneOfFields = ["offset"]),
+                        Object.defineProperty(DocumentInfo.prototype, "documentDescriptor", {
+                            get: $util.oneOfGetter($oneOfFields = ["id", "name", "uri"]),
                             set: $util.oneOfSetter($oneOfFields)
                         });
     
                         /**
-                         * Creates a new SearchInfo instance using the specified properties.
+                         * DocumentInfo _quantity.
+                         * @member {"quantity"|undefined} _quantity
+                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
+                         * @instance
+                         */
+                        Object.defineProperty(DocumentInfo.prototype, "_quantity", {
+                            get: $util.oneOfGetter($oneOfFields = ["quantity"]),
+                            set: $util.oneOfSetter($oneOfFields)
+                        });
+    
+                        /**
+                         * Creates a new DocumentInfo instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
+                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ISearchInfo=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.SearchInfo} SearchInfo instance
+                         * @param {google.cloud.discoveryengine.v1.IDocumentInfo=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.DocumentInfo} DocumentInfo instance
                          */
-                        SearchInfo.create = function create(properties) {
-                            return new SearchInfo(properties);
+                        DocumentInfo.create = function create(properties) {
+                            return new DocumentInfo(properties);
                         };
     
                         /**
-                         * Encodes the specified SearchInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchInfo.verify|verify} messages.
+                         * Encodes the specified DocumentInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentInfo.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
+                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ISearchInfo} message SearchInfo message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IDocumentInfo} message DocumentInfo message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        SearchInfo.encode = function encode(message, writer) {
+                        DocumentInfo.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.searchQuery != null && Object.hasOwnProperty.call(message, "searchQuery"))
-                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.searchQuery);
-                            if (message.orderBy != null && Object.hasOwnProperty.call(message, "orderBy"))
-                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.orderBy);
-                            if (message.offset != null && Object.hasOwnProperty.call(message, "offset"))
-                                writer.uint32(/* id 3, wireType 0 =*/24).int32(message.offset);
+                            if (message.id != null && Object.hasOwnProperty.call(message, "id"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.id);
+                            if (message.name != null && Object.hasOwnProperty.call(message, "name"))
+                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.name);
+                            if (message.quantity != null && Object.hasOwnProperty.call(message, "quantity"))
+                                writer.uint32(/* id 3, wireType 0 =*/24).int32(message.quantity);
+                            if (message.promotionIds != null && message.promotionIds.length)
+                                for (var i = 0; i < message.promotionIds.length; ++i)
+                                    writer.uint32(/* id 4, wireType 2 =*/34).string(message.promotionIds[i]);
+                            if (message.uri != null && Object.hasOwnProperty.call(message, "uri"))
+                                writer.uint32(/* id 6, wireType 2 =*/50).string(message.uri);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified SearchInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchInfo.verify|verify} messages.
+                         * Encodes the specified DocumentInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentInfo.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
+                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ISearchInfo} message SearchInfo message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IDocumentInfo} message DocumentInfo message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        SearchInfo.encodeDelimited = function encodeDelimited(message, writer) {
+                        DocumentInfo.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a SearchInfo message from the specified reader or buffer.
+                         * Decodes a DocumentInfo message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
+                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.SearchInfo} SearchInfo
+                         * @returns {google.cloud.discoveryengine.v1.DocumentInfo} DocumentInfo
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        SearchInfo.decode = function decode(reader, length) {
+                        DocumentInfo.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.SearchInfo();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.DocumentInfo();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 1: {
-                                        message.searchQuery = reader.string();
+                                        message.id = reader.string();
                                         break;
                                     }
                                 case 2: {
-                                        message.orderBy = reader.string();
+                                        message.name = reader.string();
+                                        break;
+                                    }
+                                case 6: {
+                                        message.uri = reader.string();
                                         break;
                                     }
                                 case 3: {
-                                        message.offset = reader.int32();
+                                        message.quantity = reader.int32();
+                                        break;
+                                    }
+                                case 4: {
+                                        if (!(message.promotionIds && message.promotionIds.length))
+                                            message.promotionIds = [];
+                                        message.promotionIds.push(reader.string());
                                         break;
                                     }
                                 default:
@@ -15963,145 +20029,190 @@
                         };
     
                         /**
-                         * Decodes a SearchInfo message from the specified reader or buffer, length delimited.
+                         * Decodes a DocumentInfo message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
+                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.SearchInfo} SearchInfo
+                         * @returns {google.cloud.discoveryengine.v1.DocumentInfo} DocumentInfo
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        SearchInfo.decodeDelimited = function decodeDelimited(reader) {
+                        DocumentInfo.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a SearchInfo message.
+                         * Verifies a DocumentInfo message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
+                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        SearchInfo.verify = function verify(message) {
+                        DocumentInfo.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
                             var properties = {};
-                            if (message.searchQuery != null && message.hasOwnProperty("searchQuery"))
-                                if (!$util.isString(message.searchQuery))
-                                    return "searchQuery: string expected";
-                            if (message.orderBy != null && message.hasOwnProperty("orderBy"))
-                                if (!$util.isString(message.orderBy))
-                                    return "orderBy: string expected";
-                            if (message.offset != null && message.hasOwnProperty("offset")) {
-                                properties._offset = 1;
-                                if (!$util.isInteger(message.offset))
-                                    return "offset: integer expected";
+                            if (message.id != null && message.hasOwnProperty("id")) {
+                                properties.documentDescriptor = 1;
+                                if (!$util.isString(message.id))
+                                    return "id: string expected";
+                            }
+                            if (message.name != null && message.hasOwnProperty("name")) {
+                                if (properties.documentDescriptor === 1)
+                                    return "documentDescriptor: multiple values";
+                                properties.documentDescriptor = 1;
+                                if (!$util.isString(message.name))
+                                    return "name: string expected";
+                            }
+                            if (message.uri != null && message.hasOwnProperty("uri")) {
+                                if (properties.documentDescriptor === 1)
+                                    return "documentDescriptor: multiple values";
+                                properties.documentDescriptor = 1;
+                                if (!$util.isString(message.uri))
+                                    return "uri: string expected";
+                            }
+                            if (message.quantity != null && message.hasOwnProperty("quantity")) {
+                                properties._quantity = 1;
+                                if (!$util.isInteger(message.quantity))
+                                    return "quantity: integer expected";
+                            }
+                            if (message.promotionIds != null && message.hasOwnProperty("promotionIds")) {
+                                if (!Array.isArray(message.promotionIds))
+                                    return "promotionIds: array expected";
+                                for (var i = 0; i < message.promotionIds.length; ++i)
+                                    if (!$util.isString(message.promotionIds[i]))
+                                        return "promotionIds: string[] expected";
                             }
                             return null;
                         };
     
                         /**
-                         * Creates a SearchInfo message from a plain object. Also converts values to their respective internal types.
+                         * Creates a DocumentInfo message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
+                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.SearchInfo} SearchInfo
+                         * @returns {google.cloud.discoveryengine.v1.DocumentInfo} DocumentInfo
                          */
-                        SearchInfo.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.SearchInfo)
+                        DocumentInfo.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.DocumentInfo)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.SearchInfo();
-                            if (object.searchQuery != null)
-                                message.searchQuery = String(object.searchQuery);
-                            if (object.orderBy != null)
-                                message.orderBy = String(object.orderBy);
-                            if (object.offset != null)
-                                message.offset = object.offset | 0;
+                            var message = new $root.google.cloud.discoveryengine.v1.DocumentInfo();
+                            if (object.id != null)
+                                message.id = String(object.id);
+                            if (object.name != null)
+                                message.name = String(object.name);
+                            if (object.uri != null)
+                                message.uri = String(object.uri);
+                            if (object.quantity != null)
+                                message.quantity = object.quantity | 0;
+                            if (object.promotionIds) {
+                                if (!Array.isArray(object.promotionIds))
+                                    throw TypeError(".google.cloud.discoveryengine.v1.DocumentInfo.promotionIds: array expected");
+                                message.promotionIds = [];
+                                for (var i = 0; i < object.promotionIds.length; ++i)
+                                    message.promotionIds[i] = String(object.promotionIds[i]);
+                            }
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a SearchInfo message. Also converts values to other types if specified.
+                         * Creates a plain object from a DocumentInfo message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
+                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.SearchInfo} message SearchInfo
+                         * @param {google.cloud.discoveryengine.v1.DocumentInfo} message DocumentInfo
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        SearchInfo.toObject = function toObject(message, options) {
+                        DocumentInfo.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
-                            if (options.defaults) {
-                                object.searchQuery = "";
-                                object.orderBy = "";
+                            if (options.arrays || options.defaults)
+                                object.promotionIds = [];
+                            if (message.id != null && message.hasOwnProperty("id")) {
+                                object.id = message.id;
+                                if (options.oneofs)
+                                    object.documentDescriptor = "id";
                             }
-                            if (message.searchQuery != null && message.hasOwnProperty("searchQuery"))
-                                object.searchQuery = message.searchQuery;
-                            if (message.orderBy != null && message.hasOwnProperty("orderBy"))
-                                object.orderBy = message.orderBy;
-                            if (message.offset != null && message.hasOwnProperty("offset")) {
-                                object.offset = message.offset;
+                            if (message.name != null && message.hasOwnProperty("name")) {
+                                object.name = message.name;
                                 if (options.oneofs)
-                                    object._offset = "offset";
+                                    object.documentDescriptor = "name";
+                            }
+                            if (message.quantity != null && message.hasOwnProperty("quantity")) {
+                                object.quantity = message.quantity;
+                                if (options.oneofs)
+                                    object._quantity = "quantity";
+                            }
+                            if (message.promotionIds && message.promotionIds.length) {
+                                object.promotionIds = [];
+                                for (var j = 0; j < message.promotionIds.length; ++j)
+                                    object.promotionIds[j] = message.promotionIds[j];
+                            }
+                            if (message.uri != null && message.hasOwnProperty("uri")) {
+                                object.uri = message.uri;
+                                if (options.oneofs)
+                                    object.documentDescriptor = "uri";
                             }
                             return object;
                         };
     
                         /**
-                         * Converts this SearchInfo to JSON.
+                         * Converts this DocumentInfo to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
+                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        SearchInfo.prototype.toJSON = function toJSON() {
+                        DocumentInfo.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for SearchInfo
+                         * Gets the default type url for DocumentInfo
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.SearchInfo
+                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        SearchInfo.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        DocumentInfo.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.SearchInfo";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.DocumentInfo";
                         };
     
-                        return SearchInfo;
+                        return DocumentInfo;
                     })();
     
-                    v1.CompletionInfo = (function() {
+                    v1.PanelInfo = (function() {
     
                         /**
-                         * Properties of a CompletionInfo.
+                         * Properties of a PanelInfo.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface ICompletionInfo
-                         * @property {string|null} [selectedSuggestion] CompletionInfo selectedSuggestion
-                         * @property {number|null} [selectedPosition] CompletionInfo selectedPosition
+                         * @interface IPanelInfo
+                         * @property {string|null} [panelId] PanelInfo panelId
+                         * @property {string|null} [displayName] PanelInfo displayName
+                         * @property {number|null} [panelPosition] PanelInfo panelPosition
+                         * @property {number|null} [totalPanels] PanelInfo totalPanels
                          */
     
                         /**
-                         * Constructs a new CompletionInfo.
+                         * Constructs a new PanelInfo.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a CompletionInfo.
-                         * @implements ICompletionInfo
+                         * @classdesc Represents a PanelInfo.
+                         * @implements IPanelInfo
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.ICompletionInfo=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IPanelInfo=} [properties] Properties to set
                          */
-                        function CompletionInfo(properties) {
+                        function PanelInfo(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -16109,89 +20220,142 @@
                         }
     
                         /**
-                         * CompletionInfo selectedSuggestion.
-                         * @member {string} selectedSuggestion
-                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
+                         * PanelInfo panelId.
+                         * @member {string} panelId
+                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
                          * @instance
                          */
-                        CompletionInfo.prototype.selectedSuggestion = "";
+                        PanelInfo.prototype.panelId = "";
     
                         /**
-                         * CompletionInfo selectedPosition.
-                         * @member {number} selectedPosition
-                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
+                         * PanelInfo displayName.
+                         * @member {string} displayName
+                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
                          * @instance
                          */
-                        CompletionInfo.prototype.selectedPosition = 0;
+                        PanelInfo.prototype.displayName = "";
     
                         /**
-                         * Creates a new CompletionInfo instance using the specified properties.
+                         * PanelInfo panelPosition.
+                         * @member {number|null|undefined} panelPosition
+                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
+                         * @instance
+                         */
+                        PanelInfo.prototype.panelPosition = null;
+    
+                        /**
+                         * PanelInfo totalPanels.
+                         * @member {number|null|undefined} totalPanels
+                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
+                         * @instance
+                         */
+                        PanelInfo.prototype.totalPanels = null;
+    
+                        // OneOf field names bound to virtual getters and setters
+                        var $oneOfFields;
+    
+                        /**
+                         * PanelInfo _panelPosition.
+                         * @member {"panelPosition"|undefined} _panelPosition
+                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
+                         * @instance
+                         */
+                        Object.defineProperty(PanelInfo.prototype, "_panelPosition", {
+                            get: $util.oneOfGetter($oneOfFields = ["panelPosition"]),
+                            set: $util.oneOfSetter($oneOfFields)
+                        });
+    
+                        /**
+                         * PanelInfo _totalPanels.
+                         * @member {"totalPanels"|undefined} _totalPanels
+                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
+                         * @instance
+                         */
+                        Object.defineProperty(PanelInfo.prototype, "_totalPanels", {
+                            get: $util.oneOfGetter($oneOfFields = ["totalPanels"]),
+                            set: $util.oneOfSetter($oneOfFields)
+                        });
+    
+                        /**
+                         * Creates a new PanelInfo instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
+                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ICompletionInfo=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.CompletionInfo} CompletionInfo instance
+                         * @param {google.cloud.discoveryengine.v1.IPanelInfo=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.PanelInfo} PanelInfo instance
                          */
-                        CompletionInfo.create = function create(properties) {
-                            return new CompletionInfo(properties);
+                        PanelInfo.create = function create(properties) {
+                            return new PanelInfo(properties);
                         };
     
                         /**
-                         * Encodes the specified CompletionInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.CompletionInfo.verify|verify} messages.
+                         * Encodes the specified PanelInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.PanelInfo.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
+                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ICompletionInfo} message CompletionInfo message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IPanelInfo} message PanelInfo message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        CompletionInfo.encode = function encode(message, writer) {
+                        PanelInfo.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.selectedSuggestion != null && Object.hasOwnProperty.call(message, "selectedSuggestion"))
-                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.selectedSuggestion);
-                            if (message.selectedPosition != null && Object.hasOwnProperty.call(message, "selectedPosition"))
-                                writer.uint32(/* id 2, wireType 0 =*/16).int32(message.selectedPosition);
+                            if (message.panelId != null && Object.hasOwnProperty.call(message, "panelId"))
+                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.panelId);
+                            if (message.displayName != null && Object.hasOwnProperty.call(message, "displayName"))
+                                writer.uint32(/* id 3, wireType 2 =*/26).string(message.displayName);
+                            if (message.panelPosition != null && Object.hasOwnProperty.call(message, "panelPosition"))
+                                writer.uint32(/* id 4, wireType 0 =*/32).int32(message.panelPosition);
+                            if (message.totalPanels != null && Object.hasOwnProperty.call(message, "totalPanels"))
+                                writer.uint32(/* id 5, wireType 0 =*/40).int32(message.totalPanels);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified CompletionInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.CompletionInfo.verify|verify} messages.
+                         * Encodes the specified PanelInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PanelInfo.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
+                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ICompletionInfo} message CompletionInfo message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IPanelInfo} message PanelInfo message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        CompletionInfo.encodeDelimited = function encodeDelimited(message, writer) {
+                        PanelInfo.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a CompletionInfo message from the specified reader or buffer.
+                         * Decodes a PanelInfo message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
+                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.CompletionInfo} CompletionInfo
+                         * @returns {google.cloud.discoveryengine.v1.PanelInfo} PanelInfo
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        CompletionInfo.decode = function decode(reader, length) {
+                        PanelInfo.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.CompletionInfo();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.PanelInfo();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
-                                case 1: {
-                                        message.selectedSuggestion = reader.string();
+                                case 2: {
+                                        message.panelId = reader.string();
                                         break;
                                     }
-                                case 2: {
-                                        message.selectedPosition = reader.int32();
+                                case 3: {
+                                        message.displayName = reader.string();
+                                        break;
+                                    }
+                                case 4: {
+                                        message.panelPosition = reader.int32();
+                                        break;
+                                    }
+                                case 5: {
+                                        message.totalPanels = reader.int32();
                                         break;
                                     }
                                 default:
@@ -16203,329 +20367,261 @@
                         };
     
                         /**
-                         * Decodes a CompletionInfo message from the specified reader or buffer, length delimited.
+                         * Decodes a PanelInfo message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
+                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.CompletionInfo} CompletionInfo
+                         * @returns {google.cloud.discoveryengine.v1.PanelInfo} PanelInfo
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        CompletionInfo.decodeDelimited = function decodeDelimited(reader) {
+                        PanelInfo.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a CompletionInfo message.
+                         * Verifies a PanelInfo message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
+                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        CompletionInfo.verify = function verify(message) {
+                        PanelInfo.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            if (message.selectedSuggestion != null && message.hasOwnProperty("selectedSuggestion"))
-                                if (!$util.isString(message.selectedSuggestion))
-                                    return "selectedSuggestion: string expected";
-                            if (message.selectedPosition != null && message.hasOwnProperty("selectedPosition"))
-                                if (!$util.isInteger(message.selectedPosition))
-                                    return "selectedPosition: integer expected";
+                            var properties = {};
+                            if (message.panelId != null && message.hasOwnProperty("panelId"))
+                                if (!$util.isString(message.panelId))
+                                    return "panelId: string expected";
+                            if (message.displayName != null && message.hasOwnProperty("displayName"))
+                                if (!$util.isString(message.displayName))
+                                    return "displayName: string expected";
+                            if (message.panelPosition != null && message.hasOwnProperty("panelPosition")) {
+                                properties._panelPosition = 1;
+                                if (!$util.isInteger(message.panelPosition))
+                                    return "panelPosition: integer expected";
+                            }
+                            if (message.totalPanels != null && message.hasOwnProperty("totalPanels")) {
+                                properties._totalPanels = 1;
+                                if (!$util.isInteger(message.totalPanels))
+                                    return "totalPanels: integer expected";
+                            }
                             return null;
                         };
     
                         /**
-                         * Creates a CompletionInfo message from a plain object. Also converts values to their respective internal types.
+                         * Creates a PanelInfo message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
+                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.CompletionInfo} CompletionInfo
+                         * @returns {google.cloud.discoveryengine.v1.PanelInfo} PanelInfo
                          */
-                        CompletionInfo.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.CompletionInfo)
+                        PanelInfo.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.PanelInfo)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.CompletionInfo();
-                            if (object.selectedSuggestion != null)
-                                message.selectedSuggestion = String(object.selectedSuggestion);
-                            if (object.selectedPosition != null)
-                                message.selectedPosition = object.selectedPosition | 0;
+                            var message = new $root.google.cloud.discoveryengine.v1.PanelInfo();
+                            if (object.panelId != null)
+                                message.panelId = String(object.panelId);
+                            if (object.displayName != null)
+                                message.displayName = String(object.displayName);
+                            if (object.panelPosition != null)
+                                message.panelPosition = object.panelPosition | 0;
+                            if (object.totalPanels != null)
+                                message.totalPanels = object.totalPanels | 0;
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a CompletionInfo message. Also converts values to other types if specified.
+                         * Creates a plain object from a PanelInfo message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
+                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.CompletionInfo} message CompletionInfo
+                         * @param {google.cloud.discoveryengine.v1.PanelInfo} message PanelInfo
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        CompletionInfo.toObject = function toObject(message, options) {
+                        PanelInfo.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
                             if (options.defaults) {
-                                object.selectedSuggestion = "";
-                                object.selectedPosition = 0;
+                                object.panelId = "";
+                                object.displayName = "";
+                            }
+                            if (message.panelId != null && message.hasOwnProperty("panelId"))
+                                object.panelId = message.panelId;
+                            if (message.displayName != null && message.hasOwnProperty("displayName"))
+                                object.displayName = message.displayName;
+                            if (message.panelPosition != null && message.hasOwnProperty("panelPosition")) {
+                                object.panelPosition = message.panelPosition;
+                                if (options.oneofs)
+                                    object._panelPosition = "panelPosition";
+                            }
+                            if (message.totalPanels != null && message.hasOwnProperty("totalPanels")) {
+                                object.totalPanels = message.totalPanels;
+                                if (options.oneofs)
+                                    object._totalPanels = "totalPanels";
                             }
-                            if (message.selectedSuggestion != null && message.hasOwnProperty("selectedSuggestion"))
-                                object.selectedSuggestion = message.selectedSuggestion;
-                            if (message.selectedPosition != null && message.hasOwnProperty("selectedPosition"))
-                                object.selectedPosition = message.selectedPosition;
                             return object;
                         };
     
                         /**
-                         * Converts this CompletionInfo to JSON.
+                         * Converts this PanelInfo to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
-                         * @instance
-                         * @returns {Object.<string,*>} JSON object
-                         */
-                        CompletionInfo.prototype.toJSON = function toJSON() {
-                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
-                        };
-    
-                        /**
-                         * Gets the default type url for CompletionInfo
-                         * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.CompletionInfo
-                         * @static
-                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                         * @returns {string} The default type url
-                         */
-                        CompletionInfo.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
-                            if (typeUrlPrefix === undefined) {
-                                typeUrlPrefix = "type.googleapis.com";
-                            }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.CompletionInfo";
-                        };
-    
-                        return CompletionInfo;
-                    })();
-    
-                    v1.TransactionInfo = (function() {
-    
-                        /**
-                         * Properties of a TransactionInfo.
-                         * @memberof google.cloud.discoveryengine.v1
-                         * @interface ITransactionInfo
-                         * @property {number|null} [value] TransactionInfo value
-                         * @property {string|null} [currency] TransactionInfo currency
-                         * @property {string|null} [transactionId] TransactionInfo transactionId
-                         * @property {number|null} [tax] TransactionInfo tax
-                         * @property {number|null} [cost] TransactionInfo cost
-                         * @property {number|null} [discountValue] TransactionInfo discountValue
-                         */
-    
-                        /**
-                         * Constructs a new TransactionInfo.
-                         * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a TransactionInfo.
-                         * @implements ITransactionInfo
-                         * @constructor
-                         * @param {google.cloud.discoveryengine.v1.ITransactionInfo=} [properties] Properties to set
-                         */
-                        function TransactionInfo(properties) {
-                            if (properties)
-                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
-                                    if (properties[keys[i]] != null)
-                                        this[keys[i]] = properties[keys[i]];
-                        }
-    
-                        /**
-                         * TransactionInfo value.
-                         * @member {number|null|undefined} value
-                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
-                         * @instance
-                         */
-                        TransactionInfo.prototype.value = null;
-    
-                        /**
-                         * TransactionInfo currency.
-                         * @member {string} currency
-                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
-                         * @instance
-                         */
-                        TransactionInfo.prototype.currency = "";
-    
-                        /**
-                         * TransactionInfo transactionId.
-                         * @member {string} transactionId
-                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
-                         * @instance
-                         */
-                        TransactionInfo.prototype.transactionId = "";
-    
-                        /**
-                         * TransactionInfo tax.
-                         * @member {number|null|undefined} tax
-                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
-                         * @instance
-                         */
-                        TransactionInfo.prototype.tax = null;
-    
-                        /**
-                         * TransactionInfo cost.
-                         * @member {number|null|undefined} cost
-                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
+                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
                          * @instance
+                         * @returns {Object.<string,*>} JSON object
                          */
-                        TransactionInfo.prototype.cost = null;
+                        PanelInfo.prototype.toJSON = function toJSON() {
+                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                        };
     
                         /**
-                         * TransactionInfo discountValue.
-                         * @member {number|null|undefined} discountValue
-                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
-                         * @instance
+                         * Gets the default type url for PanelInfo
+                         * @function getTypeUrl
+                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
+                         * @static
+                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns {string} The default type url
                          */
-                        TransactionInfo.prototype.discountValue = null;
+                        PanelInfo.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                            if (typeUrlPrefix === undefined) {
+                                typeUrlPrefix = "type.googleapis.com";
+                            }
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.PanelInfo";
+                        };
     
-                        // OneOf field names bound to virtual getters and setters
-                        var $oneOfFields;
+                        return PanelInfo;
+                    })();
+    
+                    v1.MediaInfo = (function() {
     
                         /**
-                         * TransactionInfo _value.
-                         * @member {"value"|undefined} _value
-                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
-                         * @instance
+                         * Properties of a MediaInfo.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @interface IMediaInfo
+                         * @property {google.protobuf.IDuration|null} [mediaProgressDuration] MediaInfo mediaProgressDuration
+                         * @property {number|null} [mediaProgressPercentage] MediaInfo mediaProgressPercentage
                          */
-                        Object.defineProperty(TransactionInfo.prototype, "_value", {
-                            get: $util.oneOfGetter($oneOfFields = ["value"]),
-                            set: $util.oneOfSetter($oneOfFields)
-                        });
     
                         /**
-                         * TransactionInfo _tax.
-                         * @member {"tax"|undefined} _tax
-                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
+                         * Constructs a new MediaInfo.
+                         * @memberof google.cloud.discoveryengine.v1
+                         * @classdesc Represents a MediaInfo.
+                         * @implements IMediaInfo
+                         * @constructor
+                         * @param {google.cloud.discoveryengine.v1.IMediaInfo=} [properties] Properties to set
+                         */
+                        function MediaInfo(properties) {
+                            if (properties)
+                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                    if (properties[keys[i]] != null)
+                                        this[keys[i]] = properties[keys[i]];
+                        }
+    
+                        /**
+                         * MediaInfo mediaProgressDuration.
+                         * @member {google.protobuf.IDuration|null|undefined} mediaProgressDuration
+                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
                          * @instance
                          */
-                        Object.defineProperty(TransactionInfo.prototype, "_tax", {
-                            get: $util.oneOfGetter($oneOfFields = ["tax"]),
-                            set: $util.oneOfSetter($oneOfFields)
-                        });
+                        MediaInfo.prototype.mediaProgressDuration = null;
     
                         /**
-                         * TransactionInfo _cost.
-                         * @member {"cost"|undefined} _cost
-                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
+                         * MediaInfo mediaProgressPercentage.
+                         * @member {number|null|undefined} mediaProgressPercentage
+                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
                          * @instance
                          */
-                        Object.defineProperty(TransactionInfo.prototype, "_cost", {
-                            get: $util.oneOfGetter($oneOfFields = ["cost"]),
-                            set: $util.oneOfSetter($oneOfFields)
-                        });
+                        MediaInfo.prototype.mediaProgressPercentage = null;
+    
+                        // OneOf field names bound to virtual getters and setters
+                        var $oneOfFields;
     
                         /**
-                         * TransactionInfo _discountValue.
-                         * @member {"discountValue"|undefined} _discountValue
-                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
+                         * MediaInfo _mediaProgressPercentage.
+                         * @member {"mediaProgressPercentage"|undefined} _mediaProgressPercentage
+                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
                          * @instance
                          */
-                        Object.defineProperty(TransactionInfo.prototype, "_discountValue", {
-                            get: $util.oneOfGetter($oneOfFields = ["discountValue"]),
+                        Object.defineProperty(MediaInfo.prototype, "_mediaProgressPercentage", {
+                            get: $util.oneOfGetter($oneOfFields = ["mediaProgressPercentage"]),
                             set: $util.oneOfSetter($oneOfFields)
                         });
     
                         /**
-                         * Creates a new TransactionInfo instance using the specified properties.
+                         * Creates a new MediaInfo instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
+                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ITransactionInfo=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.TransactionInfo} TransactionInfo instance
+                         * @param {google.cloud.discoveryengine.v1.IMediaInfo=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.MediaInfo} MediaInfo instance
                          */
-                        TransactionInfo.create = function create(properties) {
-                            return new TransactionInfo(properties);
+                        MediaInfo.create = function create(properties) {
+                            return new MediaInfo(properties);
                         };
     
                         /**
-                         * Encodes the specified TransactionInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.TransactionInfo.verify|verify} messages.
+                         * Encodes the specified MediaInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.MediaInfo.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
+                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ITransactionInfo} message TransactionInfo message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IMediaInfo} message MediaInfo message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        TransactionInfo.encode = function encode(message, writer) {
+                        MediaInfo.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.value != null && Object.hasOwnProperty.call(message, "value"))
-                                writer.uint32(/* id 1, wireType 5 =*/13).float(message.value);
-                            if (message.currency != null && Object.hasOwnProperty.call(message, "currency"))
-                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.currency);
-                            if (message.transactionId != null && Object.hasOwnProperty.call(message, "transactionId"))
-                                writer.uint32(/* id 3, wireType 2 =*/26).string(message.transactionId);
-                            if (message.tax != null && Object.hasOwnProperty.call(message, "tax"))
-                                writer.uint32(/* id 4, wireType 5 =*/37).float(message.tax);
-                            if (message.cost != null && Object.hasOwnProperty.call(message, "cost"))
-                                writer.uint32(/* id 5, wireType 5 =*/45).float(message.cost);
-                            if (message.discountValue != null && Object.hasOwnProperty.call(message, "discountValue"))
-                                writer.uint32(/* id 6, wireType 5 =*/53).float(message.discountValue);
+                            if (message.mediaProgressDuration != null && Object.hasOwnProperty.call(message, "mediaProgressDuration"))
+                                $root.google.protobuf.Duration.encode(message.mediaProgressDuration, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                            if (message.mediaProgressPercentage != null && Object.hasOwnProperty.call(message, "mediaProgressPercentage"))
+                                writer.uint32(/* id 2, wireType 5 =*/21).float(message.mediaProgressPercentage);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified TransactionInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.TransactionInfo.verify|verify} messages.
+                         * Encodes the specified MediaInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.MediaInfo.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
+                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.ITransactionInfo} message TransactionInfo message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IMediaInfo} message MediaInfo message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        TransactionInfo.encodeDelimited = function encodeDelimited(message, writer) {
+                        MediaInfo.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a TransactionInfo message from the specified reader or buffer.
+                         * Decodes a MediaInfo message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
+                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.TransactionInfo} TransactionInfo
+                         * @returns {google.cloud.discoveryengine.v1.MediaInfo} MediaInfo
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        TransactionInfo.decode = function decode(reader, length) {
+                        MediaInfo.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.TransactionInfo();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.MediaInfo();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 1: {
-                                        message.value = reader.float();
+                                        message.mediaProgressDuration = $root.google.protobuf.Duration.decode(reader, reader.uint32());
                                         break;
                                     }
                                 case 2: {
-                                        message.currency = reader.string();
-                                        break;
-                                    }
-                                case 3: {
-                                        message.transactionId = reader.string();
-                                        break;
-                                    }
-                                case 4: {
-                                        message.tax = reader.float();
-                                        break;
-                                    }
-                                case 5: {
-                                        message.cost = reader.float();
-                                        break;
-                                    }
-                                case 6: {
-                                        message.discountValue = reader.float();
+                                        message.mediaProgressPercentage = reader.float();
                                         break;
                                     }
                                 default:
@@ -16537,185 +20633,142 @@
                         };
     
                         /**
-                         * Decodes a TransactionInfo message from the specified reader or buffer, length delimited.
+                         * Decodes a MediaInfo message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
+                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.TransactionInfo} TransactionInfo
+                         * @returns {google.cloud.discoveryengine.v1.MediaInfo} MediaInfo
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        TransactionInfo.decodeDelimited = function decodeDelimited(reader) {
+                        MediaInfo.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a TransactionInfo message.
+                         * Verifies a MediaInfo message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
+                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        TransactionInfo.verify = function verify(message) {
+                        MediaInfo.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
                             var properties = {};
-                            if (message.value != null && message.hasOwnProperty("value")) {
-                                properties._value = 1;
-                                if (typeof message.value !== "number")
-                                    return "value: number expected";
-                            }
-                            if (message.currency != null && message.hasOwnProperty("currency"))
-                                if (!$util.isString(message.currency))
-                                    return "currency: string expected";
-                            if (message.transactionId != null && message.hasOwnProperty("transactionId"))
-                                if (!$util.isString(message.transactionId))
-                                    return "transactionId: string expected";
-                            if (message.tax != null && message.hasOwnProperty("tax")) {
-                                properties._tax = 1;
-                                if (typeof message.tax !== "number")
-                                    return "tax: number expected";
-                            }
-                            if (message.cost != null && message.hasOwnProperty("cost")) {
-                                properties._cost = 1;
-                                if (typeof message.cost !== "number")
-                                    return "cost: number expected";
+                            if (message.mediaProgressDuration != null && message.hasOwnProperty("mediaProgressDuration")) {
+                                var error = $root.google.protobuf.Duration.verify(message.mediaProgressDuration);
+                                if (error)
+                                    return "mediaProgressDuration." + error;
                             }
-                            if (message.discountValue != null && message.hasOwnProperty("discountValue")) {
-                                properties._discountValue = 1;
-                                if (typeof message.discountValue !== "number")
-                                    return "discountValue: number expected";
+                            if (message.mediaProgressPercentage != null && message.hasOwnProperty("mediaProgressPercentage")) {
+                                properties._mediaProgressPercentage = 1;
+                                if (typeof message.mediaProgressPercentage !== "number")
+                                    return "mediaProgressPercentage: number expected";
                             }
                             return null;
                         };
     
                         /**
-                         * Creates a TransactionInfo message from a plain object. Also converts values to their respective internal types.
+                         * Creates a MediaInfo message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
+                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.TransactionInfo} TransactionInfo
+                         * @returns {google.cloud.discoveryengine.v1.MediaInfo} MediaInfo
                          */
-                        TransactionInfo.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.TransactionInfo)
+                        MediaInfo.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.MediaInfo)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.TransactionInfo();
-                            if (object.value != null)
-                                message.value = Number(object.value);
-                            if (object.currency != null)
-                                message.currency = String(object.currency);
-                            if (object.transactionId != null)
-                                message.transactionId = String(object.transactionId);
-                            if (object.tax != null)
-                                message.tax = Number(object.tax);
-                            if (object.cost != null)
-                                message.cost = Number(object.cost);
-                            if (object.discountValue != null)
-                                message.discountValue = Number(object.discountValue);
+                            var message = new $root.google.cloud.discoveryengine.v1.MediaInfo();
+                            if (object.mediaProgressDuration != null) {
+                                if (typeof object.mediaProgressDuration !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.MediaInfo.mediaProgressDuration: object expected");
+                                message.mediaProgressDuration = $root.google.protobuf.Duration.fromObject(object.mediaProgressDuration);
+                            }
+                            if (object.mediaProgressPercentage != null)
+                                message.mediaProgressPercentage = Number(object.mediaProgressPercentage);
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a TransactionInfo message. Also converts values to other types if specified.
+                         * Creates a plain object from a MediaInfo message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
+                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.TransactionInfo} message TransactionInfo
+                         * @param {google.cloud.discoveryengine.v1.MediaInfo} message MediaInfo
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        TransactionInfo.toObject = function toObject(message, options) {
+                        MediaInfo.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
-                            if (options.defaults) {
-                                object.currency = "";
-                                object.transactionId = "";
-                            }
-                            if (message.value != null && message.hasOwnProperty("value")) {
-                                object.value = options.json && !isFinite(message.value) ? String(message.value) : message.value;
-                                if (options.oneofs)
-                                    object._value = "value";
-                            }
-                            if (message.currency != null && message.hasOwnProperty("currency"))
-                                object.currency = message.currency;
-                            if (message.transactionId != null && message.hasOwnProperty("transactionId"))
-                                object.transactionId = message.transactionId;
-                            if (message.tax != null && message.hasOwnProperty("tax")) {
-                                object.tax = options.json && !isFinite(message.tax) ? String(message.tax) : message.tax;
-                                if (options.oneofs)
-                                    object._tax = "tax";
-                            }
-                            if (message.cost != null && message.hasOwnProperty("cost")) {
-                                object.cost = options.json && !isFinite(message.cost) ? String(message.cost) : message.cost;
-                                if (options.oneofs)
-                                    object._cost = "cost";
-                            }
-                            if (message.discountValue != null && message.hasOwnProperty("discountValue")) {
-                                object.discountValue = options.json && !isFinite(message.discountValue) ? String(message.discountValue) : message.discountValue;
+                            if (options.defaults)
+                                object.mediaProgressDuration = null;
+                            if (message.mediaProgressDuration != null && message.hasOwnProperty("mediaProgressDuration"))
+                                object.mediaProgressDuration = $root.google.protobuf.Duration.toObject(message.mediaProgressDuration, options);
+                            if (message.mediaProgressPercentage != null && message.hasOwnProperty("mediaProgressPercentage")) {
+                                object.mediaProgressPercentage = options.json && !isFinite(message.mediaProgressPercentage) ? String(message.mediaProgressPercentage) : message.mediaProgressPercentage;
                                 if (options.oneofs)
-                                    object._discountValue = "discountValue";
+                                    object._mediaProgressPercentage = "mediaProgressPercentage";
                             }
                             return object;
                         };
     
                         /**
-                         * Converts this TransactionInfo to JSON.
+                         * Converts this MediaInfo to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
+                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        TransactionInfo.prototype.toJSON = function toJSON() {
+                        MediaInfo.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for TransactionInfo
+                         * Gets the default type url for MediaInfo
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.TransactionInfo
+                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        TransactionInfo.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        MediaInfo.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.TransactionInfo";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.MediaInfo";
                         };
     
-                        return TransactionInfo;
+                        return MediaInfo;
                     })();
     
-                    v1.DocumentInfo = (function() {
+                    v1.PurgeDocumentsRequest = (function() {
     
                         /**
-                         * Properties of a DocumentInfo.
+                         * Properties of a PurgeDocumentsRequest.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IDocumentInfo
-                         * @property {string|null} [id] DocumentInfo id
-                         * @property {string|null} [name] DocumentInfo name
-                         * @property {string|null} [uri] DocumentInfo uri
-                         * @property {number|null} [quantity] DocumentInfo quantity
-                         * @property {Array.<string>|null} [promotionIds] DocumentInfo promotionIds
+                         * @interface IPurgeDocumentsRequest
+                         * @property {string|null} [parent] PurgeDocumentsRequest parent
+                         * @property {string|null} [filter] PurgeDocumentsRequest filter
+                         * @property {boolean|null} [force] PurgeDocumentsRequest force
                          */
     
                         /**
-                         * Constructs a new DocumentInfo.
+                         * Constructs a new PurgeDocumentsRequest.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a DocumentInfo.
-                         * @implements IDocumentInfo
+                         * @classdesc Represents a PurgeDocumentsRequest.
+                         * @implements IPurgeDocumentsRequest
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IDocumentInfo=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsRequest=} [properties] Properties to set
                          */
-                        function DocumentInfo(properties) {
-                            this.promotionIds = [];
+                        function PurgeDocumentsRequest(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -16723,159 +20776,103 @@
                         }
     
                         /**
-                         * DocumentInfo id.
-                         * @member {string|null|undefined} id
-                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
-                         * @instance
-                         */
-                        DocumentInfo.prototype.id = null;
-    
-                        /**
-                         * DocumentInfo name.
-                         * @member {string|null|undefined} name
-                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
-                         * @instance
-                         */
-                        DocumentInfo.prototype.name = null;
-    
-                        /**
-                         * DocumentInfo uri.
-                         * @member {string|null|undefined} uri
-                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
-                         * @instance
-                         */
-                        DocumentInfo.prototype.uri = null;
-    
-                        /**
-                         * DocumentInfo quantity.
-                         * @member {number|null|undefined} quantity
-                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
-                         * @instance
-                         */
-                        DocumentInfo.prototype.quantity = null;
-    
-                        /**
-                         * DocumentInfo promotionIds.
-                         * @member {Array.<string>} promotionIds
-                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
+                         * PurgeDocumentsRequest parent.
+                         * @member {string} parent
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
                          * @instance
                          */
-                        DocumentInfo.prototype.promotionIds = $util.emptyArray;
-    
-                        // OneOf field names bound to virtual getters and setters
-                        var $oneOfFields;
+                        PurgeDocumentsRequest.prototype.parent = "";
     
                         /**
-                         * DocumentInfo documentDescriptor.
-                         * @member {"id"|"name"|"uri"|undefined} documentDescriptor
-                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
+                         * PurgeDocumentsRequest filter.
+                         * @member {string} filter
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
                          * @instance
                          */
-                        Object.defineProperty(DocumentInfo.prototype, "documentDescriptor", {
-                            get: $util.oneOfGetter($oneOfFields = ["id", "name", "uri"]),
-                            set: $util.oneOfSetter($oneOfFields)
-                        });
+                        PurgeDocumentsRequest.prototype.filter = "";
     
                         /**
-                         * DocumentInfo _quantity.
-                         * @member {"quantity"|undefined} _quantity
-                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
+                         * PurgeDocumentsRequest force.
+                         * @member {boolean} force
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
                          * @instance
                          */
-                        Object.defineProperty(DocumentInfo.prototype, "_quantity", {
-                            get: $util.oneOfGetter($oneOfFields = ["quantity"]),
-                            set: $util.oneOfSetter($oneOfFields)
-                        });
+                        PurgeDocumentsRequest.prototype.force = false;
     
                         /**
-                         * Creates a new DocumentInfo instance using the specified properties.
+                         * Creates a new PurgeDocumentsRequest instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IDocumentInfo=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.DocumentInfo} DocumentInfo instance
+                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsRequest=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsRequest} PurgeDocumentsRequest instance
                          */
-                        DocumentInfo.create = function create(properties) {
-                            return new DocumentInfo(properties);
+                        PurgeDocumentsRequest.create = function create(properties) {
+                            return new PurgeDocumentsRequest(properties);
                         };
     
                         /**
-                         * Encodes the specified DocumentInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentInfo.verify|verify} messages.
+                         * Encodes the specified PurgeDocumentsRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsRequest.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IDocumentInfo} message DocumentInfo message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsRequest} message PurgeDocumentsRequest message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        DocumentInfo.encode = function encode(message, writer) {
+                        PurgeDocumentsRequest.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.id != null && Object.hasOwnProperty.call(message, "id"))
-                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.id);
-                            if (message.name != null && Object.hasOwnProperty.call(message, "name"))
-                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.name);
-                            if (message.quantity != null && Object.hasOwnProperty.call(message, "quantity"))
-                                writer.uint32(/* id 3, wireType 0 =*/24).int32(message.quantity);
-                            if (message.promotionIds != null && message.promotionIds.length)
-                                for (var i = 0; i < message.promotionIds.length; ++i)
-                                    writer.uint32(/* id 4, wireType 2 =*/34).string(message.promotionIds[i]);
-                            if (message.uri != null && Object.hasOwnProperty.call(message, "uri"))
-                                writer.uint32(/* id 6, wireType 2 =*/50).string(message.uri);
+                            if (message.parent != null && Object.hasOwnProperty.call(message, "parent"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.parent);
+                            if (message.filter != null && Object.hasOwnProperty.call(message, "filter"))
+                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.filter);
+                            if (message.force != null && Object.hasOwnProperty.call(message, "force"))
+                                writer.uint32(/* id 3, wireType 0 =*/24).bool(message.force);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified DocumentInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentInfo.verify|verify} messages.
+                         * Encodes the specified PurgeDocumentsRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsRequest.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IDocumentInfo} message DocumentInfo message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsRequest} message PurgeDocumentsRequest message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        DocumentInfo.encodeDelimited = function encodeDelimited(message, writer) {
+                        PurgeDocumentsRequest.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a DocumentInfo message from the specified reader or buffer.
+                         * Decodes a PurgeDocumentsRequest message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.DocumentInfo} DocumentInfo
+                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsRequest} PurgeDocumentsRequest
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        DocumentInfo.decode = function decode(reader, length) {
+                        PurgeDocumentsRequest.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.DocumentInfo();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.PurgeDocumentsRequest();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 1: {
-                                        message.id = reader.string();
+                                        message.parent = reader.string();
                                         break;
                                     }
                                 case 2: {
-                                        message.name = reader.string();
-                                        break;
-                                    }
-                                case 6: {
-                                        message.uri = reader.string();
+                                        message.filter = reader.string();
                                         break;
                                     }
                                 case 3: {
-                                        message.quantity = reader.int32();
-                                        break;
-                                    }
-                                case 4: {
-                                        if (!(message.promotionIds && message.promotionIds.length))
-                                            message.promotionIds = [];
-                                        message.promotionIds.push(reader.string());
+                                        message.force = reader.bool();
                                         break;
                                     }
                                 default:
@@ -16887,190 +20884,141 @@
                         };
     
                         /**
-                         * Decodes a DocumentInfo message from the specified reader or buffer, length delimited.
+                         * Decodes a PurgeDocumentsRequest message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.DocumentInfo} DocumentInfo
+                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsRequest} PurgeDocumentsRequest
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        DocumentInfo.decodeDelimited = function decodeDelimited(reader) {
+                        PurgeDocumentsRequest.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a DocumentInfo message.
+                         * Verifies a PurgeDocumentsRequest message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        DocumentInfo.verify = function verify(message) {
+                        PurgeDocumentsRequest.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            var properties = {};
-                            if (message.id != null && message.hasOwnProperty("id")) {
-                                properties.documentDescriptor = 1;
-                                if (!$util.isString(message.id))
-                                    return "id: string expected";
-                            }
-                            if (message.name != null && message.hasOwnProperty("name")) {
-                                if (properties.documentDescriptor === 1)
-                                    return "documentDescriptor: multiple values";
-                                properties.documentDescriptor = 1;
-                                if (!$util.isString(message.name))
-                                    return "name: string expected";
-                            }
-                            if (message.uri != null && message.hasOwnProperty("uri")) {
-                                if (properties.documentDescriptor === 1)
-                                    return "documentDescriptor: multiple values";
-                                properties.documentDescriptor = 1;
-                                if (!$util.isString(message.uri))
-                                    return "uri: string expected";
-                            }
-                            if (message.quantity != null && message.hasOwnProperty("quantity")) {
-                                properties._quantity = 1;
-                                if (!$util.isInteger(message.quantity))
-                                    return "quantity: integer expected";
-                            }
-                            if (message.promotionIds != null && message.hasOwnProperty("promotionIds")) {
-                                if (!Array.isArray(message.promotionIds))
-                                    return "promotionIds: array expected";
-                                for (var i = 0; i < message.promotionIds.length; ++i)
-                                    if (!$util.isString(message.promotionIds[i]))
-                                        return "promotionIds: string[] expected";
-                            }
+                            if (message.parent != null && message.hasOwnProperty("parent"))
+                                if (!$util.isString(message.parent))
+                                    return "parent: string expected";
+                            if (message.filter != null && message.hasOwnProperty("filter"))
+                                if (!$util.isString(message.filter))
+                                    return "filter: string expected";
+                            if (message.force != null && message.hasOwnProperty("force"))
+                                if (typeof message.force !== "boolean")
+                                    return "force: boolean expected";
                             return null;
                         };
     
                         /**
-                         * Creates a DocumentInfo message from a plain object. Also converts values to their respective internal types.
+                         * Creates a PurgeDocumentsRequest message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.DocumentInfo} DocumentInfo
+                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsRequest} PurgeDocumentsRequest
                          */
-                        DocumentInfo.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.DocumentInfo)
+                        PurgeDocumentsRequest.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.PurgeDocumentsRequest)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.DocumentInfo();
-                            if (object.id != null)
-                                message.id = String(object.id);
-                            if (object.name != null)
-                                message.name = String(object.name);
-                            if (object.uri != null)
-                                message.uri = String(object.uri);
-                            if (object.quantity != null)
-                                message.quantity = object.quantity | 0;
-                            if (object.promotionIds) {
-                                if (!Array.isArray(object.promotionIds))
-                                    throw TypeError(".google.cloud.discoveryengine.v1.DocumentInfo.promotionIds: array expected");
-                                message.promotionIds = [];
-                                for (var i = 0; i < object.promotionIds.length; ++i)
-                                    message.promotionIds[i] = String(object.promotionIds[i]);
-                            }
+                            var message = new $root.google.cloud.discoveryengine.v1.PurgeDocumentsRequest();
+                            if (object.parent != null)
+                                message.parent = String(object.parent);
+                            if (object.filter != null)
+                                message.filter = String(object.filter);
+                            if (object.force != null)
+                                message.force = Boolean(object.force);
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a DocumentInfo message. Also converts values to other types if specified.
+                         * Creates a plain object from a PurgeDocumentsRequest message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.DocumentInfo} message DocumentInfo
+                         * @param {google.cloud.discoveryengine.v1.PurgeDocumentsRequest} message PurgeDocumentsRequest
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        DocumentInfo.toObject = function toObject(message, options) {
+                        PurgeDocumentsRequest.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
-                            if (options.arrays || options.defaults)
-                                object.promotionIds = [];
-                            if (message.id != null && message.hasOwnProperty("id")) {
-                                object.id = message.id;
-                                if (options.oneofs)
-                                    object.documentDescriptor = "id";
-                            }
-                            if (message.name != null && message.hasOwnProperty("name")) {
-                                object.name = message.name;
-                                if (options.oneofs)
-                                    object.documentDescriptor = "name";
-                            }
-                            if (message.quantity != null && message.hasOwnProperty("quantity")) {
-                                object.quantity = message.quantity;
-                                if (options.oneofs)
-                                    object._quantity = "quantity";
-                            }
-                            if (message.promotionIds && message.promotionIds.length) {
-                                object.promotionIds = [];
-                                for (var j = 0; j < message.promotionIds.length; ++j)
-                                    object.promotionIds[j] = message.promotionIds[j];
-                            }
-                            if (message.uri != null && message.hasOwnProperty("uri")) {
-                                object.uri = message.uri;
-                                if (options.oneofs)
-                                    object.documentDescriptor = "uri";
+                            if (options.defaults) {
+                                object.parent = "";
+                                object.filter = "";
+                                object.force = false;
                             }
+                            if (message.parent != null && message.hasOwnProperty("parent"))
+                                object.parent = message.parent;
+                            if (message.filter != null && message.hasOwnProperty("filter"))
+                                object.filter = message.filter;
+                            if (message.force != null && message.hasOwnProperty("force"))
+                                object.force = message.force;
                             return object;
                         };
     
                         /**
-                         * Converts this DocumentInfo to JSON.
+                         * Converts this PurgeDocumentsRequest to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        DocumentInfo.prototype.toJSON = function toJSON() {
+                        PurgeDocumentsRequest.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for DocumentInfo
+                         * Gets the default type url for PurgeDocumentsRequest
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.DocumentInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        DocumentInfo.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        PurgeDocumentsRequest.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.DocumentInfo";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.PurgeDocumentsRequest";
                         };
     
-                        return DocumentInfo;
+                        return PurgeDocumentsRequest;
                     })();
     
-                    v1.PanelInfo = (function() {
+                    v1.PurgeDocumentsResponse = (function() {
     
                         /**
-                         * Properties of a PanelInfo.
+                         * Properties of a PurgeDocumentsResponse.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IPanelInfo
-                         * @property {string|null} [panelId] PanelInfo panelId
-                         * @property {string|null} [displayName] PanelInfo displayName
-                         * @property {number|null} [panelPosition] PanelInfo panelPosition
-                         * @property {number|null} [totalPanels] PanelInfo totalPanels
+                         * @interface IPurgeDocumentsResponse
+                         * @property {number|Long|null} [purgeCount] PurgeDocumentsResponse purgeCount
+                         * @property {Array.<string>|null} [purgeSample] PurgeDocumentsResponse purgeSample
                          */
     
                         /**
-                         * Constructs a new PanelInfo.
+                         * Constructs a new PurgeDocumentsResponse.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a PanelInfo.
-                         * @implements IPanelInfo
+                         * @classdesc Represents a PurgeDocumentsResponse.
+                         * @implements IPurgeDocumentsResponse
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IPanelInfo=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsResponse=} [properties] Properties to set
                          */
-                        function PanelInfo(properties) {
+                        function PurgeDocumentsResponse(properties) {
+                            this.purgeSample = [];
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -17078,142 +21026,92 @@
                         }
     
                         /**
-                         * PanelInfo panelId.
-                         * @member {string} panelId
-                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
-                         * @instance
-                         */
-                        PanelInfo.prototype.panelId = "";
-    
-                        /**
-                         * PanelInfo displayName.
-                         * @member {string} displayName
-                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
-                         * @instance
-                         */
-                        PanelInfo.prototype.displayName = "";
-    
-                        /**
-                         * PanelInfo panelPosition.
-                         * @member {number|null|undefined} panelPosition
-                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
-                         * @instance
-                         */
-                        PanelInfo.prototype.panelPosition = null;
-    
-                        /**
-                         * PanelInfo totalPanels.
-                         * @member {number|null|undefined} totalPanels
-                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
-                         * @instance
-                         */
-                        PanelInfo.prototype.totalPanels = null;
-    
-                        // OneOf field names bound to virtual getters and setters
-                        var $oneOfFields;
-    
-                        /**
-                         * PanelInfo _panelPosition.
-                         * @member {"panelPosition"|undefined} _panelPosition
-                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
+                         * PurgeDocumentsResponse purgeCount.
+                         * @member {number|Long} purgeCount
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
                          * @instance
                          */
-                        Object.defineProperty(PanelInfo.prototype, "_panelPosition", {
-                            get: $util.oneOfGetter($oneOfFields = ["panelPosition"]),
-                            set: $util.oneOfSetter($oneOfFields)
-                        });
+                        PurgeDocumentsResponse.prototype.purgeCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
     
                         /**
-                         * PanelInfo _totalPanels.
-                         * @member {"totalPanels"|undefined} _totalPanels
-                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
+                         * PurgeDocumentsResponse purgeSample.
+                         * @member {Array.<string>} purgeSample
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
                          * @instance
                          */
-                        Object.defineProperty(PanelInfo.prototype, "_totalPanels", {
-                            get: $util.oneOfGetter($oneOfFields = ["totalPanels"]),
-                            set: $util.oneOfSetter($oneOfFields)
-                        });
+                        PurgeDocumentsResponse.prototype.purgeSample = $util.emptyArray;
     
                         /**
-                         * Creates a new PanelInfo instance using the specified properties.
+                         * Creates a new PurgeDocumentsResponse instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPanelInfo=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.PanelInfo} PanelInfo instance
+                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsResponse=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsResponse} PurgeDocumentsResponse instance
                          */
-                        PanelInfo.create = function create(properties) {
-                            return new PanelInfo(properties);
+                        PurgeDocumentsResponse.create = function create(properties) {
+                            return new PurgeDocumentsResponse(properties);
                         };
     
                         /**
-                         * Encodes the specified PanelInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.PanelInfo.verify|verify} messages.
+                         * Encodes the specified PurgeDocumentsResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsResponse.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPanelInfo} message PanelInfo message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsResponse} message PurgeDocumentsResponse message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        PanelInfo.encode = function encode(message, writer) {
+                        PurgeDocumentsResponse.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.panelId != null && Object.hasOwnProperty.call(message, "panelId"))
-                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.panelId);
-                            if (message.displayName != null && Object.hasOwnProperty.call(message, "displayName"))
-                                writer.uint32(/* id 3, wireType 2 =*/26).string(message.displayName);
-                            if (message.panelPosition != null && Object.hasOwnProperty.call(message, "panelPosition"))
-                                writer.uint32(/* id 4, wireType 0 =*/32).int32(message.panelPosition);
-                            if (message.totalPanels != null && Object.hasOwnProperty.call(message, "totalPanels"))
-                                writer.uint32(/* id 5, wireType 0 =*/40).int32(message.totalPanels);
+                            if (message.purgeCount != null && Object.hasOwnProperty.call(message, "purgeCount"))
+                                writer.uint32(/* id 1, wireType 0 =*/8).int64(message.purgeCount);
+                            if (message.purgeSample != null && message.purgeSample.length)
+                                for (var i = 0; i < message.purgeSample.length; ++i)
+                                    writer.uint32(/* id 2, wireType 2 =*/18).string(message.purgeSample[i]);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified PanelInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PanelInfo.verify|verify} messages.
+                         * Encodes the specified PurgeDocumentsResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsResponse.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPanelInfo} message PanelInfo message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsResponse} message PurgeDocumentsResponse message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        PanelInfo.encodeDelimited = function encodeDelimited(message, writer) {
+                        PurgeDocumentsResponse.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a PanelInfo message from the specified reader or buffer.
+                         * Decodes a PurgeDocumentsResponse message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.PanelInfo} PanelInfo
+                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsResponse} PurgeDocumentsResponse
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        PanelInfo.decode = function decode(reader, length) {
+                        PurgeDocumentsResponse.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.PanelInfo();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.PurgeDocumentsResponse();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
-                                case 2: {
-                                        message.panelId = reader.string();
-                                        break;
-                                    }
-                                case 3: {
-                                        message.displayName = reader.string();
-                                        break;
-                                    }
-                                case 4: {
-                                        message.panelPosition = reader.int32();
+                                case 1: {
+                                        message.purgeCount = reader.int64();
                                         break;
                                     }
-                                case 5: {
-                                        message.totalPanels = reader.int32();
+                                case 2: {
+                                        if (!(message.purgeSample && message.purgeSample.length))
+                                            message.purgeSample = [];
+                                        message.purgeSample.push(reader.string());
                                         break;
                                     }
                                 default:
@@ -17225,157 +21123,161 @@
                         };
     
                         /**
-                         * Decodes a PanelInfo message from the specified reader or buffer, length delimited.
+                         * Decodes a PurgeDocumentsResponse message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.PanelInfo} PanelInfo
+                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsResponse} PurgeDocumentsResponse
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        PanelInfo.decodeDelimited = function decodeDelimited(reader) {
+                        PurgeDocumentsResponse.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a PanelInfo message.
+                         * Verifies a PurgeDocumentsResponse message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        PanelInfo.verify = function verify(message) {
+                        PurgeDocumentsResponse.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            var properties = {};
-                            if (message.panelId != null && message.hasOwnProperty("panelId"))
-                                if (!$util.isString(message.panelId))
-                                    return "panelId: string expected";
-                            if (message.displayName != null && message.hasOwnProperty("displayName"))
-                                if (!$util.isString(message.displayName))
-                                    return "displayName: string expected";
-                            if (message.panelPosition != null && message.hasOwnProperty("panelPosition")) {
-                                properties._panelPosition = 1;
-                                if (!$util.isInteger(message.panelPosition))
-                                    return "panelPosition: integer expected";
-                            }
-                            if (message.totalPanels != null && message.hasOwnProperty("totalPanels")) {
-                                properties._totalPanels = 1;
-                                if (!$util.isInteger(message.totalPanels))
-                                    return "totalPanels: integer expected";
+                            if (message.purgeCount != null && message.hasOwnProperty("purgeCount"))
+                                if (!$util.isInteger(message.purgeCount) && !(message.purgeCount && $util.isInteger(message.purgeCount.low) && $util.isInteger(message.purgeCount.high)))
+                                    return "purgeCount: integer|Long expected";
+                            if (message.purgeSample != null && message.hasOwnProperty("purgeSample")) {
+                                if (!Array.isArray(message.purgeSample))
+                                    return "purgeSample: array expected";
+                                for (var i = 0; i < message.purgeSample.length; ++i)
+                                    if (!$util.isString(message.purgeSample[i]))
+                                        return "purgeSample: string[] expected";
                             }
                             return null;
                         };
     
                         /**
-                         * Creates a PanelInfo message from a plain object. Also converts values to their respective internal types.
+                         * Creates a PurgeDocumentsResponse message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.PanelInfo} PanelInfo
+                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsResponse} PurgeDocumentsResponse
                          */
-                        PanelInfo.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.PanelInfo)
+                        PurgeDocumentsResponse.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.PurgeDocumentsResponse)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.PanelInfo();
-                            if (object.panelId != null)
-                                message.panelId = String(object.panelId);
-                            if (object.displayName != null)
-                                message.displayName = String(object.displayName);
-                            if (object.panelPosition != null)
-                                message.panelPosition = object.panelPosition | 0;
-                            if (object.totalPanels != null)
-                                message.totalPanels = object.totalPanels | 0;
+                            var message = new $root.google.cloud.discoveryengine.v1.PurgeDocumentsResponse();
+                            if (object.purgeCount != null)
+                                if ($util.Long)
+                                    (message.purgeCount = $util.Long.fromValue(object.purgeCount)).unsigned = false;
+                                else if (typeof object.purgeCount === "string")
+                                    message.purgeCount = parseInt(object.purgeCount, 10);
+                                else if (typeof object.purgeCount === "number")
+                                    message.purgeCount = object.purgeCount;
+                                else if (typeof object.purgeCount === "object")
+                                    message.purgeCount = new $util.LongBits(object.purgeCount.low >>> 0, object.purgeCount.high >>> 0).toNumber();
+                            if (object.purgeSample) {
+                                if (!Array.isArray(object.purgeSample))
+                                    throw TypeError(".google.cloud.discoveryengine.v1.PurgeDocumentsResponse.purgeSample: array expected");
+                                message.purgeSample = [];
+                                for (var i = 0; i < object.purgeSample.length; ++i)
+                                    message.purgeSample[i] = String(object.purgeSample[i]);
+                            }
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a PanelInfo message. Also converts values to other types if specified.
+                         * Creates a plain object from a PurgeDocumentsResponse message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.PanelInfo} message PanelInfo
+                         * @param {google.cloud.discoveryengine.v1.PurgeDocumentsResponse} message PurgeDocumentsResponse
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        PanelInfo.toObject = function toObject(message, options) {
+                        PurgeDocumentsResponse.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
-                            if (options.defaults) {
-                                object.panelId = "";
-                                object.displayName = "";
-                            }
-                            if (message.panelId != null && message.hasOwnProperty("panelId"))
-                                object.panelId = message.panelId;
-                            if (message.displayName != null && message.hasOwnProperty("displayName"))
-                                object.displayName = message.displayName;
-                            if (message.panelPosition != null && message.hasOwnProperty("panelPosition")) {
-                                object.panelPosition = message.panelPosition;
-                                if (options.oneofs)
-                                    object._panelPosition = "panelPosition";
-                            }
-                            if (message.totalPanels != null && message.hasOwnProperty("totalPanels")) {
-                                object.totalPanels = message.totalPanels;
-                                if (options.oneofs)
-                                    object._totalPanels = "totalPanels";
+                            if (options.arrays || options.defaults)
+                                object.purgeSample = [];
+                            if (options.defaults)
+                                if ($util.Long) {
+                                    var long = new $util.Long(0, 0, false);
+                                    object.purgeCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
+                                } else
+                                    object.purgeCount = options.longs === String ? "0" : 0;
+                            if (message.purgeCount != null && message.hasOwnProperty("purgeCount"))
+                                if (typeof message.purgeCount === "number")
+                                    object.purgeCount = options.longs === String ? String(message.purgeCount) : message.purgeCount;
+                                else
+                                    object.purgeCount = options.longs === String ? $util.Long.prototype.toString.call(message.purgeCount) : options.longs === Number ? new $util.LongBits(message.purgeCount.low >>> 0, message.purgeCount.high >>> 0).toNumber() : message.purgeCount;
+                            if (message.purgeSample && message.purgeSample.length) {
+                                object.purgeSample = [];
+                                for (var j = 0; j < message.purgeSample.length; ++j)
+                                    object.purgeSample[j] = message.purgeSample[j];
                             }
                             return object;
                         };
     
                         /**
-                         * Converts this PanelInfo to JSON.
+                         * Converts this PurgeDocumentsResponse to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        PanelInfo.prototype.toJSON = function toJSON() {
+                        PurgeDocumentsResponse.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for PanelInfo
+                         * Gets the default type url for PurgeDocumentsResponse
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.PanelInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        PanelInfo.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        PurgeDocumentsResponse.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.PanelInfo";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.PurgeDocumentsResponse";
                         };
     
-                        return PanelInfo;
+                        return PurgeDocumentsResponse;
                     })();
     
-                    v1.MediaInfo = (function() {
+                    v1.PurgeDocumentsMetadata = (function() {
     
                         /**
-                         * Properties of a MediaInfo.
+                         * Properties of a PurgeDocumentsMetadata.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IMediaInfo
-                         * @property {google.protobuf.IDuration|null} [mediaProgressDuration] MediaInfo mediaProgressDuration
-                         * @property {number|null} [mediaProgressPercentage] MediaInfo mediaProgressPercentage
+                         * @interface IPurgeDocumentsMetadata
+                         * @property {google.protobuf.ITimestamp|null} [createTime] PurgeDocumentsMetadata createTime
+                         * @property {google.protobuf.ITimestamp|null} [updateTime] PurgeDocumentsMetadata updateTime
+                         * @property {number|Long|null} [successCount] PurgeDocumentsMetadata successCount
+                         * @property {number|Long|null} [failureCount] PurgeDocumentsMetadata failureCount
+                         * @property {number|Long|null} [ignoredCount] PurgeDocumentsMetadata ignoredCount
                          */
     
                         /**
-                         * Constructs a new MediaInfo.
+                         * Constructs a new PurgeDocumentsMetadata.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a MediaInfo.
-                         * @implements IMediaInfo
+                         * @classdesc Represents a PurgeDocumentsMetadata.
+                         * @implements IPurgeDocumentsMetadata
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IMediaInfo=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsMetadata=} [properties] Properties to set
                          */
-                        function MediaInfo(properties) {
+                        function PurgeDocumentsMetadata(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -17383,103 +21285,131 @@
                         }
     
                         /**
-                         * MediaInfo mediaProgressDuration.
-                         * @member {google.protobuf.IDuration|null|undefined} mediaProgressDuration
-                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
+                         * PurgeDocumentsMetadata createTime.
+                         * @member {google.protobuf.ITimestamp|null|undefined} createTime
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
                          * @instance
                          */
-                        MediaInfo.prototype.mediaProgressDuration = null;
+                        PurgeDocumentsMetadata.prototype.createTime = null;
     
                         /**
-                         * MediaInfo mediaProgressPercentage.
-                         * @member {number|null|undefined} mediaProgressPercentage
-                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
+                         * PurgeDocumentsMetadata updateTime.
+                         * @member {google.protobuf.ITimestamp|null|undefined} updateTime
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
                          * @instance
                          */
-                        MediaInfo.prototype.mediaProgressPercentage = null;
+                        PurgeDocumentsMetadata.prototype.updateTime = null;
     
-                        // OneOf field names bound to virtual getters and setters
-                        var $oneOfFields;
+                        /**
+                         * PurgeDocumentsMetadata successCount.
+                         * @member {number|Long} successCount
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
+                         * @instance
+                         */
+                        PurgeDocumentsMetadata.prototype.successCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
     
                         /**
-                         * MediaInfo _mediaProgressPercentage.
-                         * @member {"mediaProgressPercentage"|undefined} _mediaProgressPercentage
-                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
+                         * PurgeDocumentsMetadata failureCount.
+                         * @member {number|Long} failureCount
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
                          * @instance
                          */
-                        Object.defineProperty(MediaInfo.prototype, "_mediaProgressPercentage", {
-                            get: $util.oneOfGetter($oneOfFields = ["mediaProgressPercentage"]),
-                            set: $util.oneOfSetter($oneOfFields)
-                        });
+                        PurgeDocumentsMetadata.prototype.failureCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
     
                         /**
-                         * Creates a new MediaInfo instance using the specified properties.
+                         * PurgeDocumentsMetadata ignoredCount.
+                         * @member {number|Long} ignoredCount
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
+                         * @instance
+                         */
+                        PurgeDocumentsMetadata.prototype.ignoredCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
+    
+                        /**
+                         * Creates a new PurgeDocumentsMetadata instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IMediaInfo=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.MediaInfo} MediaInfo instance
+                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsMetadata=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsMetadata} PurgeDocumentsMetadata instance
                          */
-                        MediaInfo.create = function create(properties) {
-                            return new MediaInfo(properties);
+                        PurgeDocumentsMetadata.create = function create(properties) {
+                            return new PurgeDocumentsMetadata(properties);
                         };
     
                         /**
-                         * Encodes the specified MediaInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.MediaInfo.verify|verify} messages.
+                         * Encodes the specified PurgeDocumentsMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsMetadata.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IMediaInfo} message MediaInfo message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsMetadata} message PurgeDocumentsMetadata message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        MediaInfo.encode = function encode(message, writer) {
+                        PurgeDocumentsMetadata.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.mediaProgressDuration != null && Object.hasOwnProperty.call(message, "mediaProgressDuration"))
-                                $root.google.protobuf.Duration.encode(message.mediaProgressDuration, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
-                            if (message.mediaProgressPercentage != null && Object.hasOwnProperty.call(message, "mediaProgressPercentage"))
-                                writer.uint32(/* id 2, wireType 5 =*/21).float(message.mediaProgressPercentage);
+                            if (message.createTime != null && Object.hasOwnProperty.call(message, "createTime"))
+                                $root.google.protobuf.Timestamp.encode(message.createTime, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                            if (message.updateTime != null && Object.hasOwnProperty.call(message, "updateTime"))
+                                $root.google.protobuf.Timestamp.encode(message.updateTime, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                            if (message.successCount != null && Object.hasOwnProperty.call(message, "successCount"))
+                                writer.uint32(/* id 3, wireType 0 =*/24).int64(message.successCount);
+                            if (message.failureCount != null && Object.hasOwnProperty.call(message, "failureCount"))
+                                writer.uint32(/* id 4, wireType 0 =*/32).int64(message.failureCount);
+                            if (message.ignoredCount != null && Object.hasOwnProperty.call(message, "ignoredCount"))
+                                writer.uint32(/* id 5, wireType 0 =*/40).int64(message.ignoredCount);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified MediaInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.MediaInfo.verify|verify} messages.
+                         * Encodes the specified PurgeDocumentsMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsMetadata.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IMediaInfo} message MediaInfo message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsMetadata} message PurgeDocumentsMetadata message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        MediaInfo.encodeDelimited = function encodeDelimited(message, writer) {
+                        PurgeDocumentsMetadata.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a MediaInfo message from the specified reader or buffer.
+                         * Decodes a PurgeDocumentsMetadata message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.MediaInfo} MediaInfo
+                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsMetadata} PurgeDocumentsMetadata
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        MediaInfo.decode = function decode(reader, length) {
+                        PurgeDocumentsMetadata.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.MediaInfo();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.PurgeDocumentsMetadata();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 1: {
-                                        message.mediaProgressDuration = $root.google.protobuf.Duration.decode(reader, reader.uint32());
+                                        message.createTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 2: {
+                                        message.updateTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 3: {
+                                        message.successCount = reader.int64();
+                                        break;
+                                    }
+                                case 4: {
+                                        message.failureCount = reader.int64();
                                         break;
                                     }
-                                case 2: {
-                                        message.mediaProgressPercentage = reader.float();
+                                case 5: {
+                                        message.ignoredCount = reader.int64();
                                         break;
                                     }
                                 default:
@@ -17491,142 +21421,207 @@
                         };
     
                         /**
-                         * Decodes a MediaInfo message from the specified reader or buffer, length delimited.
+                         * Decodes a PurgeDocumentsMetadata message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.MediaInfo} MediaInfo
+                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsMetadata} PurgeDocumentsMetadata
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        MediaInfo.decodeDelimited = function decodeDelimited(reader) {
+                        PurgeDocumentsMetadata.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a MediaInfo message.
+                         * Verifies a PurgeDocumentsMetadata message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        MediaInfo.verify = function verify(message) {
+                        PurgeDocumentsMetadata.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            var properties = {};
-                            if (message.mediaProgressDuration != null && message.hasOwnProperty("mediaProgressDuration")) {
-                                var error = $root.google.protobuf.Duration.verify(message.mediaProgressDuration);
+                            if (message.createTime != null && message.hasOwnProperty("createTime")) {
+                                var error = $root.google.protobuf.Timestamp.verify(message.createTime);
                                 if (error)
-                                    return "mediaProgressDuration." + error;
+                                    return "createTime." + error;
                             }
-                            if (message.mediaProgressPercentage != null && message.hasOwnProperty("mediaProgressPercentage")) {
-                                properties._mediaProgressPercentage = 1;
-                                if (typeof message.mediaProgressPercentage !== "number")
-                                    return "mediaProgressPercentage: number expected";
+                            if (message.updateTime != null && message.hasOwnProperty("updateTime")) {
+                                var error = $root.google.protobuf.Timestamp.verify(message.updateTime);
+                                if (error)
+                                    return "updateTime." + error;
                             }
+                            if (message.successCount != null && message.hasOwnProperty("successCount"))
+                                if (!$util.isInteger(message.successCount) && !(message.successCount && $util.isInteger(message.successCount.low) && $util.isInteger(message.successCount.high)))
+                                    return "successCount: integer|Long expected";
+                            if (message.failureCount != null && message.hasOwnProperty("failureCount"))
+                                if (!$util.isInteger(message.failureCount) && !(message.failureCount && $util.isInteger(message.failureCount.low) && $util.isInteger(message.failureCount.high)))
+                                    return "failureCount: integer|Long expected";
+                            if (message.ignoredCount != null && message.hasOwnProperty("ignoredCount"))
+                                if (!$util.isInteger(message.ignoredCount) && !(message.ignoredCount && $util.isInteger(message.ignoredCount.low) && $util.isInteger(message.ignoredCount.high)))
+                                    return "ignoredCount: integer|Long expected";
                             return null;
                         };
     
                         /**
-                         * Creates a MediaInfo message from a plain object. Also converts values to their respective internal types.
+                         * Creates a PurgeDocumentsMetadata message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.MediaInfo} MediaInfo
+                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsMetadata} PurgeDocumentsMetadata
                          */
-                        MediaInfo.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.MediaInfo)
+                        PurgeDocumentsMetadata.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.PurgeDocumentsMetadata)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.MediaInfo();
-                            if (object.mediaProgressDuration != null) {
-                                if (typeof object.mediaProgressDuration !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.MediaInfo.mediaProgressDuration: object expected");
-                                message.mediaProgressDuration = $root.google.protobuf.Duration.fromObject(object.mediaProgressDuration);
+                            var message = new $root.google.cloud.discoveryengine.v1.PurgeDocumentsMetadata();
+                            if (object.createTime != null) {
+                                if (typeof object.createTime !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.PurgeDocumentsMetadata.createTime: object expected");
+                                message.createTime = $root.google.protobuf.Timestamp.fromObject(object.createTime);
                             }
-                            if (object.mediaProgressPercentage != null)
-                                message.mediaProgressPercentage = Number(object.mediaProgressPercentage);
+                            if (object.updateTime != null) {
+                                if (typeof object.updateTime !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.PurgeDocumentsMetadata.updateTime: object expected");
+                                message.updateTime = $root.google.protobuf.Timestamp.fromObject(object.updateTime);
+                            }
+                            if (object.successCount != null)
+                                if ($util.Long)
+                                    (message.successCount = $util.Long.fromValue(object.successCount)).unsigned = false;
+                                else if (typeof object.successCount === "string")
+                                    message.successCount = parseInt(object.successCount, 10);
+                                else if (typeof object.successCount === "number")
+                                    message.successCount = object.successCount;
+                                else if (typeof object.successCount === "object")
+                                    message.successCount = new $util.LongBits(object.successCount.low >>> 0, object.successCount.high >>> 0).toNumber();
+                            if (object.failureCount != null)
+                                if ($util.Long)
+                                    (message.failureCount = $util.Long.fromValue(object.failureCount)).unsigned = false;
+                                else if (typeof object.failureCount === "string")
+                                    message.failureCount = parseInt(object.failureCount, 10);
+                                else if (typeof object.failureCount === "number")
+                                    message.failureCount = object.failureCount;
+                                else if (typeof object.failureCount === "object")
+                                    message.failureCount = new $util.LongBits(object.failureCount.low >>> 0, object.failureCount.high >>> 0).toNumber();
+                            if (object.ignoredCount != null)
+                                if ($util.Long)
+                                    (message.ignoredCount = $util.Long.fromValue(object.ignoredCount)).unsigned = false;
+                                else if (typeof object.ignoredCount === "string")
+                                    message.ignoredCount = parseInt(object.ignoredCount, 10);
+                                else if (typeof object.ignoredCount === "number")
+                                    message.ignoredCount = object.ignoredCount;
+                                else if (typeof object.ignoredCount === "object")
+                                    message.ignoredCount = new $util.LongBits(object.ignoredCount.low >>> 0, object.ignoredCount.high >>> 0).toNumber();
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a MediaInfo message. Also converts values to other types if specified.
+                         * Creates a plain object from a PurgeDocumentsMetadata message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.MediaInfo} message MediaInfo
+                         * @param {google.cloud.discoveryengine.v1.PurgeDocumentsMetadata} message PurgeDocumentsMetadata
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        MediaInfo.toObject = function toObject(message, options) {
+                        PurgeDocumentsMetadata.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
-                            if (options.defaults)
-                                object.mediaProgressDuration = null;
-                            if (message.mediaProgressDuration != null && message.hasOwnProperty("mediaProgressDuration"))
-                                object.mediaProgressDuration = $root.google.protobuf.Duration.toObject(message.mediaProgressDuration, options);
-                            if (message.mediaProgressPercentage != null && message.hasOwnProperty("mediaProgressPercentage")) {
-                                object.mediaProgressPercentage = options.json && !isFinite(message.mediaProgressPercentage) ? String(message.mediaProgressPercentage) : message.mediaProgressPercentage;
-                                if (options.oneofs)
-                                    object._mediaProgressPercentage = "mediaProgressPercentage";
+                            if (options.defaults) {
+                                object.createTime = null;
+                                object.updateTime = null;
+                                if ($util.Long) {
+                                    var long = new $util.Long(0, 0, false);
+                                    object.successCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
+                                } else
+                                    object.successCount = options.longs === String ? "0" : 0;
+                                if ($util.Long) {
+                                    var long = new $util.Long(0, 0, false);
+                                    object.failureCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
+                                } else
+                                    object.failureCount = options.longs === String ? "0" : 0;
+                                if ($util.Long) {
+                                    var long = new $util.Long(0, 0, false);
+                                    object.ignoredCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
+                                } else
+                                    object.ignoredCount = options.longs === String ? "0" : 0;
                             }
+                            if (message.createTime != null && message.hasOwnProperty("createTime"))
+                                object.createTime = $root.google.protobuf.Timestamp.toObject(message.createTime, options);
+                            if (message.updateTime != null && message.hasOwnProperty("updateTime"))
+                                object.updateTime = $root.google.protobuf.Timestamp.toObject(message.updateTime, options);
+                            if (message.successCount != null && message.hasOwnProperty("successCount"))
+                                if (typeof message.successCount === "number")
+                                    object.successCount = options.longs === String ? String(message.successCount) : message.successCount;
+                                else
+                                    object.successCount = options.longs === String ? $util.Long.prototype.toString.call(message.successCount) : options.longs === Number ? new $util.LongBits(message.successCount.low >>> 0, message.successCount.high >>> 0).toNumber() : message.successCount;
+                            if (message.failureCount != null && message.hasOwnProperty("failureCount"))
+                                if (typeof message.failureCount === "number")
+                                    object.failureCount = options.longs === String ? String(message.failureCount) : message.failureCount;
+                                else
+                                    object.failureCount = options.longs === String ? $util.Long.prototype.toString.call(message.failureCount) : options.longs === Number ? new $util.LongBits(message.failureCount.low >>> 0, message.failureCount.high >>> 0).toNumber() : message.failureCount;
+                            if (message.ignoredCount != null && message.hasOwnProperty("ignoredCount"))
+                                if (typeof message.ignoredCount === "number")
+                                    object.ignoredCount = options.longs === String ? String(message.ignoredCount) : message.ignoredCount;
+                                else
+                                    object.ignoredCount = options.longs === String ? $util.Long.prototype.toString.call(message.ignoredCount) : options.longs === Number ? new $util.LongBits(message.ignoredCount.low >>> 0, message.ignoredCount.high >>> 0).toNumber() : message.ignoredCount;
                             return object;
                         };
     
                         /**
-                         * Converts this MediaInfo to JSON.
+                         * Converts this PurgeDocumentsMetadata to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        MediaInfo.prototype.toJSON = function toJSON() {
+                        PurgeDocumentsMetadata.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for MediaInfo
+                         * Gets the default type url for PurgeDocumentsMetadata
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.MediaInfo
+                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        MediaInfo.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        PurgeDocumentsMetadata.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.MediaInfo";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.PurgeDocumentsMetadata";
                         };
     
-                        return MediaInfo;
+                        return PurgeDocumentsMetadata;
                     })();
     
-                    v1.PurgeDocumentsRequest = (function() {
+                    v1.PurgeSuggestionDenyListEntriesRequest = (function() {
     
                         /**
-                         * Properties of a PurgeDocumentsRequest.
+                         * Properties of a PurgeSuggestionDenyListEntriesRequest.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IPurgeDocumentsRequest
-                         * @property {string|null} [parent] PurgeDocumentsRequest parent
-                         * @property {string|null} [filter] PurgeDocumentsRequest filter
-                         * @property {boolean|null} [force] PurgeDocumentsRequest force
+                         * @interface IPurgeSuggestionDenyListEntriesRequest
+                         * @property {string|null} [parent] PurgeSuggestionDenyListEntriesRequest parent
                          */
     
                         /**
-                         * Constructs a new PurgeDocumentsRequest.
+                         * Constructs a new PurgeSuggestionDenyListEntriesRequest.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a PurgeDocumentsRequest.
-                         * @implements IPurgeDocumentsRequest
+                         * @classdesc Represents a PurgeSuggestionDenyListEntriesRequest.
+                         * @implements IPurgeSuggestionDenyListEntriesRequest
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsRequest=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesRequest=} [properties] Properties to set
                          */
-                        function PurgeDocumentsRequest(properties) {
+                        function PurgeSuggestionDenyListEntriesRequest(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -17634,90 +21629,70 @@
                         }
     
                         /**
-                         * PurgeDocumentsRequest parent.
+                         * PurgeSuggestionDenyListEntriesRequest parent.
                          * @member {string} parent
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
-                         * @instance
-                         */
-                        PurgeDocumentsRequest.prototype.parent = "";
-    
-                        /**
-                         * PurgeDocumentsRequest filter.
-                         * @member {string} filter
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
-                         * @instance
-                         */
-                        PurgeDocumentsRequest.prototype.filter = "";
-    
-                        /**
-                         * PurgeDocumentsRequest force.
-                         * @member {boolean} force
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest
                          * @instance
                          */
-                        PurgeDocumentsRequest.prototype.force = false;
+                        PurgeSuggestionDenyListEntriesRequest.prototype.parent = "";
     
                         /**
-                         * Creates a new PurgeDocumentsRequest instance using the specified properties.
+                         * Creates a new PurgeSuggestionDenyListEntriesRequest instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsRequest=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsRequest} PurgeDocumentsRequest instance
+                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesRequest=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest} PurgeSuggestionDenyListEntriesRequest instance
                          */
-                        PurgeDocumentsRequest.create = function create(properties) {
-                            return new PurgeDocumentsRequest(properties);
+                        PurgeSuggestionDenyListEntriesRequest.create = function create(properties) {
+                            return new PurgeSuggestionDenyListEntriesRequest(properties);
                         };
     
                         /**
-                         * Encodes the specified PurgeDocumentsRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsRequest.verify|verify} messages.
+                         * Encodes the specified PurgeSuggestionDenyListEntriesRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsRequest} message PurgeDocumentsRequest message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesRequest} message PurgeSuggestionDenyListEntriesRequest message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        PurgeDocumentsRequest.encode = function encode(message, writer) {
+                        PurgeSuggestionDenyListEntriesRequest.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
                             if (message.parent != null && Object.hasOwnProperty.call(message, "parent"))
                                 writer.uint32(/* id 1, wireType 2 =*/10).string(message.parent);
-                            if (message.filter != null && Object.hasOwnProperty.call(message, "filter"))
-                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.filter);
-                            if (message.force != null && Object.hasOwnProperty.call(message, "force"))
-                                writer.uint32(/* id 3, wireType 0 =*/24).bool(message.force);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified PurgeDocumentsRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsRequest.verify|verify} messages.
+                         * Encodes the specified PurgeSuggestionDenyListEntriesRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsRequest} message PurgeDocumentsRequest message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesRequest} message PurgeSuggestionDenyListEntriesRequest message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        PurgeDocumentsRequest.encodeDelimited = function encodeDelimited(message, writer) {
+                        PurgeSuggestionDenyListEntriesRequest.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a PurgeDocumentsRequest message from the specified reader or buffer.
+                         * Decodes a PurgeSuggestionDenyListEntriesRequest message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsRequest} PurgeDocumentsRequest
+                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest} PurgeSuggestionDenyListEntriesRequest
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        PurgeDocumentsRequest.decode = function decode(reader, length) {
+                        PurgeSuggestionDenyListEntriesRequest.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.PurgeDocumentsRequest();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
@@ -17725,14 +21700,6 @@
                                         message.parent = reader.string();
                                         break;
                                     }
-                                case 2: {
-                                        message.filter = reader.string();
-                                        break;
-                                    }
-                                case 3: {
-                                        message.force = reader.bool();
-                                        break;
-                                    }
                                 default:
                                     reader.skipType(tag & 7);
                                     break;
@@ -17742,141 +21709,124 @@
                         };
     
                         /**
-                         * Decodes a PurgeDocumentsRequest message from the specified reader or buffer, length delimited.
+                         * Decodes a PurgeSuggestionDenyListEntriesRequest message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsRequest} PurgeDocumentsRequest
+                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest} PurgeSuggestionDenyListEntriesRequest
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        PurgeDocumentsRequest.decodeDelimited = function decodeDelimited(reader) {
+                        PurgeSuggestionDenyListEntriesRequest.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a PurgeDocumentsRequest message.
+                         * Verifies a PurgeSuggestionDenyListEntriesRequest message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        PurgeDocumentsRequest.verify = function verify(message) {
+                        PurgeSuggestionDenyListEntriesRequest.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
                             if (message.parent != null && message.hasOwnProperty("parent"))
                                 if (!$util.isString(message.parent))
                                     return "parent: string expected";
-                            if (message.filter != null && message.hasOwnProperty("filter"))
-                                if (!$util.isString(message.filter))
-                                    return "filter: string expected";
-                            if (message.force != null && message.hasOwnProperty("force"))
-                                if (typeof message.force !== "boolean")
-                                    return "force: boolean expected";
                             return null;
                         };
     
                         /**
-                         * Creates a PurgeDocumentsRequest message from a plain object. Also converts values to their respective internal types.
+                         * Creates a PurgeSuggestionDenyListEntriesRequest message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsRequest} PurgeDocumentsRequest
+                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest} PurgeSuggestionDenyListEntriesRequest
                          */
-                        PurgeDocumentsRequest.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.PurgeDocumentsRequest)
+                        PurgeSuggestionDenyListEntriesRequest.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.PurgeDocumentsRequest();
+                            var message = new $root.google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest();
                             if (object.parent != null)
                                 message.parent = String(object.parent);
-                            if (object.filter != null)
-                                message.filter = String(object.filter);
-                            if (object.force != null)
-                                message.force = Boolean(object.force);
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a PurgeDocumentsRequest message. Also converts values to other types if specified.
+                         * Creates a plain object from a PurgeSuggestionDenyListEntriesRequest message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.PurgeDocumentsRequest} message PurgeDocumentsRequest
+                         * @param {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest} message PurgeSuggestionDenyListEntriesRequest
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        PurgeDocumentsRequest.toObject = function toObject(message, options) {
+                        PurgeSuggestionDenyListEntriesRequest.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
-                            if (options.defaults) {
+                            if (options.defaults)
                                 object.parent = "";
-                                object.filter = "";
-                                object.force = false;
-                            }
                             if (message.parent != null && message.hasOwnProperty("parent"))
                                 object.parent = message.parent;
-                            if (message.filter != null && message.hasOwnProperty("filter"))
-                                object.filter = message.filter;
-                            if (message.force != null && message.hasOwnProperty("force"))
-                                object.force = message.force;
                             return object;
                         };
     
                         /**
-                         * Converts this PurgeDocumentsRequest to JSON.
+                         * Converts this PurgeSuggestionDenyListEntriesRequest to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        PurgeDocumentsRequest.prototype.toJSON = function toJSON() {
+                        PurgeSuggestionDenyListEntriesRequest.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for PurgeDocumentsRequest
+                         * Gets the default type url for PurgeSuggestionDenyListEntriesRequest
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsRequest
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        PurgeDocumentsRequest.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        PurgeSuggestionDenyListEntriesRequest.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.PurgeDocumentsRequest";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest";
                         };
     
-                        return PurgeDocumentsRequest;
+                        return PurgeSuggestionDenyListEntriesRequest;
                     })();
     
-                    v1.PurgeDocumentsResponse = (function() {
+                    v1.PurgeSuggestionDenyListEntriesResponse = (function() {
     
                         /**
-                         * Properties of a PurgeDocumentsResponse.
+                         * Properties of a PurgeSuggestionDenyListEntriesResponse.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IPurgeDocumentsResponse
-                         * @property {number|Long|null} [purgeCount] PurgeDocumentsResponse purgeCount
-                         * @property {Array.<string>|null} [purgeSample] PurgeDocumentsResponse purgeSample
+                         * @interface IPurgeSuggestionDenyListEntriesResponse
+                         * @property {number|Long|null} [purgeCount] PurgeSuggestionDenyListEntriesResponse purgeCount
+                         * @property {Array.<google.rpc.IStatus>|null} [errorSamples] PurgeSuggestionDenyListEntriesResponse errorSamples
                          */
     
                         /**
-                         * Constructs a new PurgeDocumentsResponse.
+                         * Constructs a new PurgeSuggestionDenyListEntriesResponse.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a PurgeDocumentsResponse.
-                         * @implements IPurgeDocumentsResponse
+                         * @classdesc Represents a PurgeSuggestionDenyListEntriesResponse.
+                         * @implements IPurgeSuggestionDenyListEntriesResponse
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsResponse=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesResponse=} [properties] Properties to set
                          */
-                        function PurgeDocumentsResponse(properties) {
-                            this.purgeSample = [];
+                        function PurgeSuggestionDenyListEntriesResponse(properties) {
+                            this.errorSamples = [];
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -17884,81 +21834,81 @@
                         }
     
                         /**
-                         * PurgeDocumentsResponse purgeCount.
+                         * PurgeSuggestionDenyListEntriesResponse purgeCount.
                          * @member {number|Long} purgeCount
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
                          * @instance
                          */
-                        PurgeDocumentsResponse.prototype.purgeCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
+                        PurgeSuggestionDenyListEntriesResponse.prototype.purgeCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
     
                         /**
-                         * PurgeDocumentsResponse purgeSample.
-                         * @member {Array.<string>} purgeSample
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
+                         * PurgeSuggestionDenyListEntriesResponse errorSamples.
+                         * @member {Array.<google.rpc.IStatus>} errorSamples
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
                          * @instance
                          */
-                        PurgeDocumentsResponse.prototype.purgeSample = $util.emptyArray;
+                        PurgeSuggestionDenyListEntriesResponse.prototype.errorSamples = $util.emptyArray;
     
                         /**
-                         * Creates a new PurgeDocumentsResponse instance using the specified properties.
+                         * Creates a new PurgeSuggestionDenyListEntriesResponse instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsResponse=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsResponse} PurgeDocumentsResponse instance
+                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesResponse=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse} PurgeSuggestionDenyListEntriesResponse instance
                          */
-                        PurgeDocumentsResponse.create = function create(properties) {
-                            return new PurgeDocumentsResponse(properties);
+                        PurgeSuggestionDenyListEntriesResponse.create = function create(properties) {
+                            return new PurgeSuggestionDenyListEntriesResponse(properties);
                         };
     
                         /**
-                         * Encodes the specified PurgeDocumentsResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsResponse.verify|verify} messages.
+                         * Encodes the specified PurgeSuggestionDenyListEntriesResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsResponse} message PurgeDocumentsResponse message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesResponse} message PurgeSuggestionDenyListEntriesResponse message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        PurgeDocumentsResponse.encode = function encode(message, writer) {
+                        PurgeSuggestionDenyListEntriesResponse.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
                             if (message.purgeCount != null && Object.hasOwnProperty.call(message, "purgeCount"))
                                 writer.uint32(/* id 1, wireType 0 =*/8).int64(message.purgeCount);
-                            if (message.purgeSample != null && message.purgeSample.length)
-                                for (var i = 0; i < message.purgeSample.length; ++i)
-                                    writer.uint32(/* id 2, wireType 2 =*/18).string(message.purgeSample[i]);
+                            if (message.errorSamples != null && message.errorSamples.length)
+                                for (var i = 0; i < message.errorSamples.length; ++i)
+                                    $root.google.rpc.Status.encode(message.errorSamples[i], writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified PurgeDocumentsResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsResponse.verify|verify} messages.
+                         * Encodes the specified PurgeSuggestionDenyListEntriesResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsResponse} message PurgeDocumentsResponse message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesResponse} message PurgeSuggestionDenyListEntriesResponse message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        PurgeDocumentsResponse.encodeDelimited = function encodeDelimited(message, writer) {
+                        PurgeSuggestionDenyListEntriesResponse.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a PurgeDocumentsResponse message from the specified reader or buffer.
+                         * Decodes a PurgeSuggestionDenyListEntriesResponse message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsResponse} PurgeDocumentsResponse
+                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse} PurgeSuggestionDenyListEntriesResponse
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        PurgeDocumentsResponse.decode = function decode(reader, length) {
+                        PurgeSuggestionDenyListEntriesResponse.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.PurgeDocumentsResponse();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
@@ -17967,9 +21917,9 @@
                                         break;
                                     }
                                 case 2: {
-                                        if (!(message.purgeSample && message.purgeSample.length))
-                                            message.purgeSample = [];
-                                        message.purgeSample.push(reader.string());
+                                        if (!(message.errorSamples && message.errorSamples.length))
+                                            message.errorSamples = [];
+                                        message.errorSamples.push($root.google.rpc.Status.decode(reader, reader.uint32()));
                                         break;
                                     }
                                 default:
@@ -17981,57 +21931,59 @@
                         };
     
                         /**
-                         * Decodes a PurgeDocumentsResponse message from the specified reader or buffer, length delimited.
+                         * Decodes a PurgeSuggestionDenyListEntriesResponse message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsResponse} PurgeDocumentsResponse
+                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse} PurgeSuggestionDenyListEntriesResponse
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        PurgeDocumentsResponse.decodeDelimited = function decodeDelimited(reader) {
+                        PurgeSuggestionDenyListEntriesResponse.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a PurgeDocumentsResponse message.
+                         * Verifies a PurgeSuggestionDenyListEntriesResponse message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        PurgeDocumentsResponse.verify = function verify(message) {
+                        PurgeSuggestionDenyListEntriesResponse.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
                             if (message.purgeCount != null && message.hasOwnProperty("purgeCount"))
                                 if (!$util.isInteger(message.purgeCount) && !(message.purgeCount && $util.isInteger(message.purgeCount.low) && $util.isInteger(message.purgeCount.high)))
                                     return "purgeCount: integer|Long expected";
-                            if (message.purgeSample != null && message.hasOwnProperty("purgeSample")) {
-                                if (!Array.isArray(message.purgeSample))
-                                    return "purgeSample: array expected";
-                                for (var i = 0; i < message.purgeSample.length; ++i)
-                                    if (!$util.isString(message.purgeSample[i]))
-                                        return "purgeSample: string[] expected";
+                            if (message.errorSamples != null && message.hasOwnProperty("errorSamples")) {
+                                if (!Array.isArray(message.errorSamples))
+                                    return "errorSamples: array expected";
+                                for (var i = 0; i < message.errorSamples.length; ++i) {
+                                    var error = $root.google.rpc.Status.verify(message.errorSamples[i]);
+                                    if (error)
+                                        return "errorSamples." + error;
+                                }
                             }
                             return null;
                         };
     
                         /**
-                         * Creates a PurgeDocumentsResponse message from a plain object. Also converts values to their respective internal types.
+                         * Creates a PurgeSuggestionDenyListEntriesResponse message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsResponse} PurgeDocumentsResponse
+                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse} PurgeSuggestionDenyListEntriesResponse
                          */
-                        PurgeDocumentsResponse.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.PurgeDocumentsResponse)
+                        PurgeSuggestionDenyListEntriesResponse.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.PurgeDocumentsResponse();
+                            var message = new $root.google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse();
                             if (object.purgeCount != null)
                                 if ($util.Long)
                                     (message.purgeCount = $util.Long.fromValue(object.purgeCount)).unsigned = false;
@@ -18041,31 +21993,34 @@
                                     message.purgeCount = object.purgeCount;
                                 else if (typeof object.purgeCount === "object")
                                     message.purgeCount = new $util.LongBits(object.purgeCount.low >>> 0, object.purgeCount.high >>> 0).toNumber();
-                            if (object.purgeSample) {
-                                if (!Array.isArray(object.purgeSample))
-                                    throw TypeError(".google.cloud.discoveryengine.v1.PurgeDocumentsResponse.purgeSample: array expected");
-                                message.purgeSample = [];
-                                for (var i = 0; i < object.purgeSample.length; ++i)
-                                    message.purgeSample[i] = String(object.purgeSample[i]);
+                            if (object.errorSamples) {
+                                if (!Array.isArray(object.errorSamples))
+                                    throw TypeError(".google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse.errorSamples: array expected");
+                                message.errorSamples = [];
+                                for (var i = 0; i < object.errorSamples.length; ++i) {
+                                    if (typeof object.errorSamples[i] !== "object")
+                                        throw TypeError(".google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse.errorSamples: object expected");
+                                    message.errorSamples[i] = $root.google.rpc.Status.fromObject(object.errorSamples[i]);
+                                }
                             }
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a PurgeDocumentsResponse message. Also converts values to other types if specified.
+                         * Creates a plain object from a PurgeSuggestionDenyListEntriesResponse message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.PurgeDocumentsResponse} message PurgeDocumentsResponse
+                         * @param {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse} message PurgeSuggestionDenyListEntriesResponse
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        PurgeDocumentsResponse.toObject = function toObject(message, options) {
+                        PurgeSuggestionDenyListEntriesResponse.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
                             if (options.arrays || options.defaults)
-                                object.purgeSample = [];
+                                object.errorSamples = [];
                             if (options.defaults)
                                 if ($util.Long) {
                                     var long = new $util.Long(0, 0, false);
@@ -18077,65 +22032,62 @@
                                     object.purgeCount = options.longs === String ? String(message.purgeCount) : message.purgeCount;
                                 else
                                     object.purgeCount = options.longs === String ? $util.Long.prototype.toString.call(message.purgeCount) : options.longs === Number ? new $util.LongBits(message.purgeCount.low >>> 0, message.purgeCount.high >>> 0).toNumber() : message.purgeCount;
-                            if (message.purgeSample && message.purgeSample.length) {
-                                object.purgeSample = [];
-                                for (var j = 0; j < message.purgeSample.length; ++j)
-                                    object.purgeSample[j] = message.purgeSample[j];
+                            if (message.errorSamples && message.errorSamples.length) {
+                                object.errorSamples = [];
+                                for (var j = 0; j < message.errorSamples.length; ++j)
+                                    object.errorSamples[j] = $root.google.rpc.Status.toObject(message.errorSamples[j], options);
                             }
                             return object;
                         };
     
                         /**
-                         * Converts this PurgeDocumentsResponse to JSON.
+                         * Converts this PurgeSuggestionDenyListEntriesResponse to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        PurgeDocumentsResponse.prototype.toJSON = function toJSON() {
+                        PurgeSuggestionDenyListEntriesResponse.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for PurgeDocumentsResponse
+                         * Gets the default type url for PurgeSuggestionDenyListEntriesResponse
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsResponse
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        PurgeDocumentsResponse.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        PurgeSuggestionDenyListEntriesResponse.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.PurgeDocumentsResponse";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse";
                         };
     
-                        return PurgeDocumentsResponse;
+                        return PurgeSuggestionDenyListEntriesResponse;
                     })();
     
-                    v1.PurgeDocumentsMetadata = (function() {
+                    v1.PurgeSuggestionDenyListEntriesMetadata = (function() {
     
                         /**
-                         * Properties of a PurgeDocumentsMetadata.
+                         * Properties of a PurgeSuggestionDenyListEntriesMetadata.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IPurgeDocumentsMetadata
-                         * @property {google.protobuf.ITimestamp|null} [createTime] PurgeDocumentsMetadata createTime
-                         * @property {google.protobuf.ITimestamp|null} [updateTime] PurgeDocumentsMetadata updateTime
-                         * @property {number|Long|null} [successCount] PurgeDocumentsMetadata successCount
-                         * @property {number|Long|null} [failureCount] PurgeDocumentsMetadata failureCount
-                         * @property {number|Long|null} [ignoredCount] PurgeDocumentsMetadata ignoredCount
+                         * @interface IPurgeSuggestionDenyListEntriesMetadata
+                         * @property {google.protobuf.ITimestamp|null} [createTime] PurgeSuggestionDenyListEntriesMetadata createTime
+                         * @property {google.protobuf.ITimestamp|null} [updateTime] PurgeSuggestionDenyListEntriesMetadata updateTime
                          */
     
                         /**
-                         * Constructs a new PurgeDocumentsMetadata.
+                         * Constructs a new PurgeSuggestionDenyListEntriesMetadata.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a PurgeDocumentsMetadata.
-                         * @implements IPurgeDocumentsMetadata
+                         * @classdesc Represents a PurgeSuggestionDenyListEntriesMetadata.
+                         * @implements IPurgeSuggestionDenyListEntriesMetadata
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsMetadata=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesMetadata=} [properties] Properties to set
                          */
-                        function PurgeDocumentsMetadata(properties) {
+                        function PurgeSuggestionDenyListEntriesMetadata(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -18143,110 +22095,80 @@
                         }
     
                         /**
-                         * PurgeDocumentsMetadata createTime.
+                         * PurgeSuggestionDenyListEntriesMetadata createTime.
                          * @member {google.protobuf.ITimestamp|null|undefined} createTime
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
                          * @instance
                          */
-                        PurgeDocumentsMetadata.prototype.createTime = null;
+                        PurgeSuggestionDenyListEntriesMetadata.prototype.createTime = null;
     
                         /**
-                         * PurgeDocumentsMetadata updateTime.
+                         * PurgeSuggestionDenyListEntriesMetadata updateTime.
                          * @member {google.protobuf.ITimestamp|null|undefined} updateTime
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
-                         * @instance
-                         */
-                        PurgeDocumentsMetadata.prototype.updateTime = null;
-    
-                        /**
-                         * PurgeDocumentsMetadata successCount.
-                         * @member {number|Long} successCount
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
-                         * @instance
-                         */
-                        PurgeDocumentsMetadata.prototype.successCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
-    
-                        /**
-                         * PurgeDocumentsMetadata failureCount.
-                         * @member {number|Long} failureCount
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
-                         * @instance
-                         */
-                        PurgeDocumentsMetadata.prototype.failureCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
-    
-                        /**
-                         * PurgeDocumentsMetadata ignoredCount.
-                         * @member {number|Long} ignoredCount
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
                          * @instance
                          */
-                        PurgeDocumentsMetadata.prototype.ignoredCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
+                        PurgeSuggestionDenyListEntriesMetadata.prototype.updateTime = null;
     
                         /**
-                         * Creates a new PurgeDocumentsMetadata instance using the specified properties.
+                         * Creates a new PurgeSuggestionDenyListEntriesMetadata instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsMetadata=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsMetadata} PurgeDocumentsMetadata instance
+                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesMetadata=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata} PurgeSuggestionDenyListEntriesMetadata instance
                          */
-                        PurgeDocumentsMetadata.create = function create(properties) {
-                            return new PurgeDocumentsMetadata(properties);
+                        PurgeSuggestionDenyListEntriesMetadata.create = function create(properties) {
+                            return new PurgeSuggestionDenyListEntriesMetadata(properties);
                         };
     
                         /**
-                         * Encodes the specified PurgeDocumentsMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsMetadata.verify|verify} messages.
+                         * Encodes the specified PurgeSuggestionDenyListEntriesMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsMetadata} message PurgeDocumentsMetadata message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesMetadata} message PurgeSuggestionDenyListEntriesMetadata message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        PurgeDocumentsMetadata.encode = function encode(message, writer) {
+                        PurgeSuggestionDenyListEntriesMetadata.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
                             if (message.createTime != null && Object.hasOwnProperty.call(message, "createTime"))
                                 $root.google.protobuf.Timestamp.encode(message.createTime, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
                             if (message.updateTime != null && Object.hasOwnProperty.call(message, "updateTime"))
                                 $root.google.protobuf.Timestamp.encode(message.updateTime, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
-                            if (message.successCount != null && Object.hasOwnProperty.call(message, "successCount"))
-                                writer.uint32(/* id 3, wireType 0 =*/24).int64(message.successCount);
-                            if (message.failureCount != null && Object.hasOwnProperty.call(message, "failureCount"))
-                                writer.uint32(/* id 4, wireType 0 =*/32).int64(message.failureCount);
-                            if (message.ignoredCount != null && Object.hasOwnProperty.call(message, "ignoredCount"))
-                                writer.uint32(/* id 5, wireType 0 =*/40).int64(message.ignoredCount);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified PurgeDocumentsMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeDocumentsMetadata.verify|verify} messages.
+                         * Encodes the specified PurgeSuggestionDenyListEntriesMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPurgeDocumentsMetadata} message PurgeDocumentsMetadata message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesMetadata} message PurgeSuggestionDenyListEntriesMetadata message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        PurgeDocumentsMetadata.encodeDelimited = function encodeDelimited(message, writer) {
+                        PurgeSuggestionDenyListEntriesMetadata.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a PurgeDocumentsMetadata message from the specified reader or buffer.
+                         * Decodes a PurgeSuggestionDenyListEntriesMetadata message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsMetadata} PurgeDocumentsMetadata
+                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata} PurgeSuggestionDenyListEntriesMetadata
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        PurgeDocumentsMetadata.decode = function decode(reader, length) {
+                        PurgeSuggestionDenyListEntriesMetadata.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.PurgeDocumentsMetadata();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
@@ -18258,18 +22180,6 @@
                                         message.updateTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
                                         break;
                                     }
-                                case 3: {
-                                        message.successCount = reader.int64();
-                                        break;
-                                    }
-                                case 4: {
-                                        message.failureCount = reader.int64();
-                                        break;
-                                    }
-                                case 5: {
-                                        message.ignoredCount = reader.int64();
-                                        break;
-                                    }
                                 default:
                                     reader.skipType(tag & 7);
                                     break;
@@ -18279,30 +22189,30 @@
                         };
     
                         /**
-                         * Decodes a PurgeDocumentsMetadata message from the specified reader or buffer, length delimited.
+                         * Decodes a PurgeSuggestionDenyListEntriesMetadata message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsMetadata} PurgeDocumentsMetadata
+                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata} PurgeSuggestionDenyListEntriesMetadata
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        PurgeDocumentsMetadata.decodeDelimited = function decodeDelimited(reader) {
+                        PurgeSuggestionDenyListEntriesMetadata.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a PurgeDocumentsMetadata message.
+                         * Verifies a PurgeSuggestionDenyListEntriesMetadata message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        PurgeDocumentsMetadata.verify = function verify(message) {
+                        PurgeSuggestionDenyListEntriesMetadata.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
                             if (message.createTime != null && message.hasOwnProperty("createTime")) {
@@ -18315,171 +22225,105 @@
                                 if (error)
                                     return "updateTime." + error;
                             }
-                            if (message.successCount != null && message.hasOwnProperty("successCount"))
-                                if (!$util.isInteger(message.successCount) && !(message.successCount && $util.isInteger(message.successCount.low) && $util.isInteger(message.successCount.high)))
-                                    return "successCount: integer|Long expected";
-                            if (message.failureCount != null && message.hasOwnProperty("failureCount"))
-                                if (!$util.isInteger(message.failureCount) && !(message.failureCount && $util.isInteger(message.failureCount.low) && $util.isInteger(message.failureCount.high)))
-                                    return "failureCount: integer|Long expected";
-                            if (message.ignoredCount != null && message.hasOwnProperty("ignoredCount"))
-                                if (!$util.isInteger(message.ignoredCount) && !(message.ignoredCount && $util.isInteger(message.ignoredCount.low) && $util.isInteger(message.ignoredCount.high)))
-                                    return "ignoredCount: integer|Long expected";
                             return null;
                         };
     
                         /**
-                         * Creates a PurgeDocumentsMetadata message from a plain object. Also converts values to their respective internal types.
+                         * Creates a PurgeSuggestionDenyListEntriesMetadata message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.PurgeDocumentsMetadata} PurgeDocumentsMetadata
+                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata} PurgeSuggestionDenyListEntriesMetadata
                          */
-                        PurgeDocumentsMetadata.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.PurgeDocumentsMetadata)
+                        PurgeSuggestionDenyListEntriesMetadata.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.PurgeDocumentsMetadata();
+                            var message = new $root.google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata();
                             if (object.createTime != null) {
                                 if (typeof object.createTime !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.PurgeDocumentsMetadata.createTime: object expected");
+                                    throw TypeError(".google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata.createTime: object expected");
                                 message.createTime = $root.google.protobuf.Timestamp.fromObject(object.createTime);
                             }
                             if (object.updateTime != null) {
                                 if (typeof object.updateTime !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.PurgeDocumentsMetadata.updateTime: object expected");
+                                    throw TypeError(".google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata.updateTime: object expected");
                                 message.updateTime = $root.google.protobuf.Timestamp.fromObject(object.updateTime);
                             }
-                            if (object.successCount != null)
-                                if ($util.Long)
-                                    (message.successCount = $util.Long.fromValue(object.successCount)).unsigned = false;
-                                else if (typeof object.successCount === "string")
-                                    message.successCount = parseInt(object.successCount, 10);
-                                else if (typeof object.successCount === "number")
-                                    message.successCount = object.successCount;
-                                else if (typeof object.successCount === "object")
-                                    message.successCount = new $util.LongBits(object.successCount.low >>> 0, object.successCount.high >>> 0).toNumber();
-                            if (object.failureCount != null)
-                                if ($util.Long)
-                                    (message.failureCount = $util.Long.fromValue(object.failureCount)).unsigned = false;
-                                else if (typeof object.failureCount === "string")
-                                    message.failureCount = parseInt(object.failureCount, 10);
-                                else if (typeof object.failureCount === "number")
-                                    message.failureCount = object.failureCount;
-                                else if (typeof object.failureCount === "object")
-                                    message.failureCount = new $util.LongBits(object.failureCount.low >>> 0, object.failureCount.high >>> 0).toNumber();
-                            if (object.ignoredCount != null)
-                                if ($util.Long)
-                                    (message.ignoredCount = $util.Long.fromValue(object.ignoredCount)).unsigned = false;
-                                else if (typeof object.ignoredCount === "string")
-                                    message.ignoredCount = parseInt(object.ignoredCount, 10);
-                                else if (typeof object.ignoredCount === "number")
-                                    message.ignoredCount = object.ignoredCount;
-                                else if (typeof object.ignoredCount === "object")
-                                    message.ignoredCount = new $util.LongBits(object.ignoredCount.low >>> 0, object.ignoredCount.high >>> 0).toNumber();
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a PurgeDocumentsMetadata message. Also converts values to other types if specified.
+                         * Creates a plain object from a PurgeSuggestionDenyListEntriesMetadata message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.PurgeDocumentsMetadata} message PurgeDocumentsMetadata
+                         * @param {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata} message PurgeSuggestionDenyListEntriesMetadata
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        PurgeDocumentsMetadata.toObject = function toObject(message, options) {
+                        PurgeSuggestionDenyListEntriesMetadata.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
                             if (options.defaults) {
                                 object.createTime = null;
                                 object.updateTime = null;
-                                if ($util.Long) {
-                                    var long = new $util.Long(0, 0, false);
-                                    object.successCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
-                                } else
-                                    object.successCount = options.longs === String ? "0" : 0;
-                                if ($util.Long) {
-                                    var long = new $util.Long(0, 0, false);
-                                    object.failureCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
-                                } else
-                                    object.failureCount = options.longs === String ? "0" : 0;
-                                if ($util.Long) {
-                                    var long = new $util.Long(0, 0, false);
-                                    object.ignoredCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
-                                } else
-                                    object.ignoredCount = options.longs === String ? "0" : 0;
                             }
                             if (message.createTime != null && message.hasOwnProperty("createTime"))
                                 object.createTime = $root.google.protobuf.Timestamp.toObject(message.createTime, options);
                             if (message.updateTime != null && message.hasOwnProperty("updateTime"))
                                 object.updateTime = $root.google.protobuf.Timestamp.toObject(message.updateTime, options);
-                            if (message.successCount != null && message.hasOwnProperty("successCount"))
-                                if (typeof message.successCount === "number")
-                                    object.successCount = options.longs === String ? String(message.successCount) : message.successCount;
-                                else
-                                    object.successCount = options.longs === String ? $util.Long.prototype.toString.call(message.successCount) : options.longs === Number ? new $util.LongBits(message.successCount.low >>> 0, message.successCount.high >>> 0).toNumber() : message.successCount;
-                            if (message.failureCount != null && message.hasOwnProperty("failureCount"))
-                                if (typeof message.failureCount === "number")
-                                    object.failureCount = options.longs === String ? String(message.failureCount) : message.failureCount;
-                                else
-                                    object.failureCount = options.longs === String ? $util.Long.prototype.toString.call(message.failureCount) : options.longs === Number ? new $util.LongBits(message.failureCount.low >>> 0, message.failureCount.high >>> 0).toNumber() : message.failureCount;
-                            if (message.ignoredCount != null && message.hasOwnProperty("ignoredCount"))
-                                if (typeof message.ignoredCount === "number")
-                                    object.ignoredCount = options.longs === String ? String(message.ignoredCount) : message.ignoredCount;
-                                else
-                                    object.ignoredCount = options.longs === String ? $util.Long.prototype.toString.call(message.ignoredCount) : options.longs === Number ? new $util.LongBits(message.ignoredCount.low >>> 0, message.ignoredCount.high >>> 0).toNumber() : message.ignoredCount;
                             return object;
                         };
     
                         /**
-                         * Converts this PurgeDocumentsMetadata to JSON.
+                         * Converts this PurgeSuggestionDenyListEntriesMetadata to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        PurgeDocumentsMetadata.prototype.toJSON = function toJSON() {
+                        PurgeSuggestionDenyListEntriesMetadata.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for PurgeDocumentsMetadata
+                         * Gets the default type url for PurgeSuggestionDenyListEntriesMetadata
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.PurgeDocumentsMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        PurgeDocumentsMetadata.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        PurgeSuggestionDenyListEntriesMetadata.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.PurgeDocumentsMetadata";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata";
                         };
     
-                        return PurgeDocumentsMetadata;
+                        return PurgeSuggestionDenyListEntriesMetadata;
                     })();
     
-                    v1.PurgeSuggestionDenyListEntriesRequest = (function() {
+                    v1.PurgeCompletionSuggestionsRequest = (function() {
     
                         /**
-                         * Properties of a PurgeSuggestionDenyListEntriesRequest.
+                         * Properties of a PurgeCompletionSuggestionsRequest.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IPurgeSuggestionDenyListEntriesRequest
-                         * @property {string|null} [parent] PurgeSuggestionDenyListEntriesRequest parent
+                         * @interface IPurgeCompletionSuggestionsRequest
+                         * @property {string|null} [parent] PurgeCompletionSuggestionsRequest parent
                          */
     
                         /**
-                         * Constructs a new PurgeSuggestionDenyListEntriesRequest.
+                         * Constructs a new PurgeCompletionSuggestionsRequest.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a PurgeSuggestionDenyListEntriesRequest.
-                         * @implements IPurgeSuggestionDenyListEntriesRequest
+                         * @classdesc Represents a PurgeCompletionSuggestionsRequest.
+                         * @implements IPurgeCompletionSuggestionsRequest
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesRequest=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsRequest=} [properties] Properties to set
                          */
-                        function PurgeSuggestionDenyListEntriesRequest(properties) {
+                        function PurgeCompletionSuggestionsRequest(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -18487,35 +22331,35 @@
                         }
     
                         /**
-                         * PurgeSuggestionDenyListEntriesRequest parent.
+                         * PurgeCompletionSuggestionsRequest parent.
                          * @member {string} parent
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest
                          * @instance
                          */
-                        PurgeSuggestionDenyListEntriesRequest.prototype.parent = "";
+                        PurgeCompletionSuggestionsRequest.prototype.parent = "";
     
                         /**
-                         * Creates a new PurgeSuggestionDenyListEntriesRequest instance using the specified properties.
+                         * Creates a new PurgeCompletionSuggestionsRequest instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesRequest=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest} PurgeSuggestionDenyListEntriesRequest instance
+                         * @param {google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsRequest=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest} PurgeCompletionSuggestionsRequest instance
                          */
-                        PurgeSuggestionDenyListEntriesRequest.create = function create(properties) {
-                            return new PurgeSuggestionDenyListEntriesRequest(properties);
+                        PurgeCompletionSuggestionsRequest.create = function create(properties) {
+                            return new PurgeCompletionSuggestionsRequest(properties);
                         };
     
                         /**
-                         * Encodes the specified PurgeSuggestionDenyListEntriesRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest.verify|verify} messages.
+                         * Encodes the specified PurgeCompletionSuggestionsRequest message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesRequest} message PurgeSuggestionDenyListEntriesRequest message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsRequest} message PurgeCompletionSuggestionsRequest message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        PurgeSuggestionDenyListEntriesRequest.encode = function encode(message, writer) {
+                        PurgeCompletionSuggestionsRequest.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
                             if (message.parent != null && Object.hasOwnProperty.call(message, "parent"))
@@ -18524,33 +22368,33 @@
                         };
     
                         /**
-                         * Encodes the specified PurgeSuggestionDenyListEntriesRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest.verify|verify} messages.
+                         * Encodes the specified PurgeCompletionSuggestionsRequest message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesRequest} message PurgeSuggestionDenyListEntriesRequest message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsRequest} message PurgeCompletionSuggestionsRequest message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        PurgeSuggestionDenyListEntriesRequest.encodeDelimited = function encodeDelimited(message, writer) {
+                        PurgeCompletionSuggestionsRequest.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a PurgeSuggestionDenyListEntriesRequest message from the specified reader or buffer.
+                         * Decodes a PurgeCompletionSuggestionsRequest message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest} PurgeSuggestionDenyListEntriesRequest
+                         * @returns {google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest} PurgeCompletionSuggestionsRequest
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        PurgeSuggestionDenyListEntriesRequest.decode = function decode(reader, length) {
+                        PurgeCompletionSuggestionsRequest.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
@@ -18567,30 +22411,30 @@
                         };
     
                         /**
-                         * Decodes a PurgeSuggestionDenyListEntriesRequest message from the specified reader or buffer, length delimited.
+                         * Decodes a PurgeCompletionSuggestionsRequest message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest} PurgeSuggestionDenyListEntriesRequest
+                         * @returns {google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest} PurgeCompletionSuggestionsRequest
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        PurgeSuggestionDenyListEntriesRequest.decodeDelimited = function decodeDelimited(reader) {
+                        PurgeCompletionSuggestionsRequest.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a PurgeSuggestionDenyListEntriesRequest message.
+                         * Verifies a PurgeCompletionSuggestionsRequest message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        PurgeSuggestionDenyListEntriesRequest.verify = function verify(message) {
+                        PurgeCompletionSuggestionsRequest.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
                             if (message.parent != null && message.hasOwnProperty("parent"))
@@ -18600,32 +22444,32 @@
                         };
     
                         /**
-                         * Creates a PurgeSuggestionDenyListEntriesRequest message from a plain object. Also converts values to their respective internal types.
+                         * Creates a PurgeCompletionSuggestionsRequest message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest} PurgeSuggestionDenyListEntriesRequest
+                         * @returns {google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest} PurgeCompletionSuggestionsRequest
                          */
-                        PurgeSuggestionDenyListEntriesRequest.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest)
+                        PurgeCompletionSuggestionsRequest.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest();
+                            var message = new $root.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest();
                             if (object.parent != null)
                                 message.parent = String(object.parent);
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a PurgeSuggestionDenyListEntriesRequest message. Also converts values to other types if specified.
+                         * Creates a plain object from a PurgeCompletionSuggestionsRequest message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest} message PurgeSuggestionDenyListEntriesRequest
+                         * @param {google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest} message PurgeCompletionSuggestionsRequest
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        PurgeSuggestionDenyListEntriesRequest.toObject = function toObject(message, options) {
+                        PurgeCompletionSuggestionsRequest.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
@@ -18637,53 +22481,53 @@
                         };
     
                         /**
-                         * Converts this PurgeSuggestionDenyListEntriesRequest to JSON.
+                         * Converts this PurgeCompletionSuggestionsRequest to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        PurgeSuggestionDenyListEntriesRequest.prototype.toJSON = function toJSON() {
+                        PurgeCompletionSuggestionsRequest.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for PurgeSuggestionDenyListEntriesRequest
+                         * Gets the default type url for PurgeCompletionSuggestionsRequest
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        PurgeSuggestionDenyListEntriesRequest.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        PurgeCompletionSuggestionsRequest.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesRequest";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest";
                         };
     
-                        return PurgeSuggestionDenyListEntriesRequest;
+                        return PurgeCompletionSuggestionsRequest;
                     })();
     
-                    v1.PurgeSuggestionDenyListEntriesResponse = (function() {
+                    v1.PurgeCompletionSuggestionsResponse = (function() {
     
                         /**
-                         * Properties of a PurgeSuggestionDenyListEntriesResponse.
+                         * Properties of a PurgeCompletionSuggestionsResponse.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IPurgeSuggestionDenyListEntriesResponse
-                         * @property {number|Long|null} [purgeCount] PurgeSuggestionDenyListEntriesResponse purgeCount
-                         * @property {Array.<google.rpc.IStatus>|null} [errorSamples] PurgeSuggestionDenyListEntriesResponse errorSamples
+                         * @interface IPurgeCompletionSuggestionsResponse
+                         * @property {boolean|null} [purgeSucceeded] PurgeCompletionSuggestionsResponse purgeSucceeded
+                         * @property {Array.<google.rpc.IStatus>|null} [errorSamples] PurgeCompletionSuggestionsResponse errorSamples
                          */
     
                         /**
-                         * Constructs a new PurgeSuggestionDenyListEntriesResponse.
+                         * Constructs a new PurgeCompletionSuggestionsResponse.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a PurgeSuggestionDenyListEntriesResponse.
-                         * @implements IPurgeSuggestionDenyListEntriesResponse
+                         * @classdesc Represents a PurgeCompletionSuggestionsResponse.
+                         * @implements IPurgeCompletionSuggestionsResponse
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesResponse=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsResponse=} [properties] Properties to set
                          */
-                        function PurgeSuggestionDenyListEntriesResponse(properties) {
+                        function PurgeCompletionSuggestionsResponse(properties) {
                             this.errorSamples = [];
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
@@ -18692,47 +22536,47 @@
                         }
     
                         /**
-                         * PurgeSuggestionDenyListEntriesResponse purgeCount.
-                         * @member {number|Long} purgeCount
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
+                         * PurgeCompletionSuggestionsResponse purgeSucceeded.
+                         * @member {boolean} purgeSucceeded
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse
                          * @instance
                          */
-                        PurgeSuggestionDenyListEntriesResponse.prototype.purgeCount = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
+                        PurgeCompletionSuggestionsResponse.prototype.purgeSucceeded = false;
     
                         /**
-                         * PurgeSuggestionDenyListEntriesResponse errorSamples.
+                         * PurgeCompletionSuggestionsResponse errorSamples.
                          * @member {Array.<google.rpc.IStatus>} errorSamples
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse
                          * @instance
                          */
-                        PurgeSuggestionDenyListEntriesResponse.prototype.errorSamples = $util.emptyArray;
+                        PurgeCompletionSuggestionsResponse.prototype.errorSamples = $util.emptyArray;
     
                         /**
-                         * Creates a new PurgeSuggestionDenyListEntriesResponse instance using the specified properties.
+                         * Creates a new PurgeCompletionSuggestionsResponse instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesResponse=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse} PurgeSuggestionDenyListEntriesResponse instance
+                         * @param {google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsResponse=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse} PurgeCompletionSuggestionsResponse instance
                          */
-                        PurgeSuggestionDenyListEntriesResponse.create = function create(properties) {
-                            return new PurgeSuggestionDenyListEntriesResponse(properties);
+                        PurgeCompletionSuggestionsResponse.create = function create(properties) {
+                            return new PurgeCompletionSuggestionsResponse(properties);
                         };
     
                         /**
-                         * Encodes the specified PurgeSuggestionDenyListEntriesResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse.verify|verify} messages.
+                         * Encodes the specified PurgeCompletionSuggestionsResponse message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesResponse} message PurgeSuggestionDenyListEntriesResponse message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsResponse} message PurgeCompletionSuggestionsResponse message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        PurgeSuggestionDenyListEntriesResponse.encode = function encode(message, writer) {
+                        PurgeCompletionSuggestionsResponse.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.purgeCount != null && Object.hasOwnProperty.call(message, "purgeCount"))
-                                writer.uint32(/* id 1, wireType 0 =*/8).int64(message.purgeCount);
+                            if (message.purgeSucceeded != null && Object.hasOwnProperty.call(message, "purgeSucceeded"))
+                                writer.uint32(/* id 1, wireType 0 =*/8).bool(message.purgeSucceeded);
                             if (message.errorSamples != null && message.errorSamples.length)
                                 for (var i = 0; i < message.errorSamples.length; ++i)
                                     $root.google.rpc.Status.encode(message.errorSamples[i], writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
@@ -18740,38 +22584,38 @@
                         };
     
                         /**
-                         * Encodes the specified PurgeSuggestionDenyListEntriesResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse.verify|verify} messages.
+                         * Encodes the specified PurgeCompletionSuggestionsResponse message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesResponse} message PurgeSuggestionDenyListEntriesResponse message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsResponse} message PurgeCompletionSuggestionsResponse message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        PurgeSuggestionDenyListEntriesResponse.encodeDelimited = function encodeDelimited(message, writer) {
+                        PurgeCompletionSuggestionsResponse.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a PurgeSuggestionDenyListEntriesResponse message from the specified reader or buffer.
+                         * Decodes a PurgeCompletionSuggestionsResponse message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse} PurgeSuggestionDenyListEntriesResponse
+                         * @returns {google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse} PurgeCompletionSuggestionsResponse
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        PurgeSuggestionDenyListEntriesResponse.decode = function decode(reader, length) {
+                        PurgeCompletionSuggestionsResponse.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 1: {
-                                        message.purgeCount = reader.int64();
+                                        message.purgeSucceeded = reader.bool();
                                         break;
                                     }
                                 case 2: {
@@ -18789,35 +22633,35 @@
                         };
     
                         /**
-                         * Decodes a PurgeSuggestionDenyListEntriesResponse message from the specified reader or buffer, length delimited.
+                         * Decodes a PurgeCompletionSuggestionsResponse message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse} PurgeSuggestionDenyListEntriesResponse
+                         * @returns {google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse} PurgeCompletionSuggestionsResponse
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        PurgeSuggestionDenyListEntriesResponse.decodeDelimited = function decodeDelimited(reader) {
+                        PurgeCompletionSuggestionsResponse.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a PurgeSuggestionDenyListEntriesResponse message.
+                         * Verifies a PurgeCompletionSuggestionsResponse message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        PurgeSuggestionDenyListEntriesResponse.verify = function verify(message) {
+                        PurgeCompletionSuggestionsResponse.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            if (message.purgeCount != null && message.hasOwnProperty("purgeCount"))
-                                if (!$util.isInteger(message.purgeCount) && !(message.purgeCount && $util.isInteger(message.purgeCount.low) && $util.isInteger(message.purgeCount.high)))
-                                    return "purgeCount: integer|Long expected";
+                            if (message.purgeSucceeded != null && message.hasOwnProperty("purgeSucceeded"))
+                                if (typeof message.purgeSucceeded !== "boolean")
+                                    return "purgeSucceeded: boolean expected";
                             if (message.errorSamples != null && message.hasOwnProperty("errorSamples")) {
                                 if (!Array.isArray(message.errorSamples))
                                     return "errorSamples: array expected";
@@ -18831,33 +22675,26 @@
                         };
     
                         /**
-                         * Creates a PurgeSuggestionDenyListEntriesResponse message from a plain object. Also converts values to their respective internal types.
+                         * Creates a PurgeCompletionSuggestionsResponse message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse} PurgeSuggestionDenyListEntriesResponse
+                         * @returns {google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse} PurgeCompletionSuggestionsResponse
                          */
-                        PurgeSuggestionDenyListEntriesResponse.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse)
+                        PurgeCompletionSuggestionsResponse.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse();
-                            if (object.purgeCount != null)
-                                if ($util.Long)
-                                    (message.purgeCount = $util.Long.fromValue(object.purgeCount)).unsigned = false;
-                                else if (typeof object.purgeCount === "string")
-                                    message.purgeCount = parseInt(object.purgeCount, 10);
-                                else if (typeof object.purgeCount === "number")
-                                    message.purgeCount = object.purgeCount;
-                                else if (typeof object.purgeCount === "object")
-                                    message.purgeCount = new $util.LongBits(object.purgeCount.low >>> 0, object.purgeCount.high >>> 0).toNumber();
+                            var message = new $root.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse();
+                            if (object.purgeSucceeded != null)
+                                message.purgeSucceeded = Boolean(object.purgeSucceeded);
                             if (object.errorSamples) {
                                 if (!Array.isArray(object.errorSamples))
-                                    throw TypeError(".google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse.errorSamples: array expected");
+                                    throw TypeError(".google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse.errorSamples: array expected");
                                 message.errorSamples = [];
                                 for (var i = 0; i < object.errorSamples.length; ++i) {
                                     if (typeof object.errorSamples[i] !== "object")
-                                        throw TypeError(".google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse.errorSamples: object expected");
+                                        throw TypeError(".google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse.errorSamples: object expected");
                                     message.errorSamples[i] = $root.google.rpc.Status.fromObject(object.errorSamples[i]);
                                 }
                             }
@@ -18865,31 +22702,24 @@
                         };
     
                         /**
-                         * Creates a plain object from a PurgeSuggestionDenyListEntriesResponse message. Also converts values to other types if specified.
+                         * Creates a plain object from a PurgeCompletionSuggestionsResponse message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse} message PurgeSuggestionDenyListEntriesResponse
+                         * @param {google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse} message PurgeCompletionSuggestionsResponse
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        PurgeSuggestionDenyListEntriesResponse.toObject = function toObject(message, options) {
+                        PurgeCompletionSuggestionsResponse.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
                             if (options.arrays || options.defaults)
                                 object.errorSamples = [];
                             if (options.defaults)
-                                if ($util.Long) {
-                                    var long = new $util.Long(0, 0, false);
-                                    object.purgeCount = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
-                                } else
-                                    object.purgeCount = options.longs === String ? "0" : 0;
-                            if (message.purgeCount != null && message.hasOwnProperty("purgeCount"))
-                                if (typeof message.purgeCount === "number")
-                                    object.purgeCount = options.longs === String ? String(message.purgeCount) : message.purgeCount;
-                                else
-                                    object.purgeCount = options.longs === String ? $util.Long.prototype.toString.call(message.purgeCount) : options.longs === Number ? new $util.LongBits(message.purgeCount.low >>> 0, message.purgeCount.high >>> 0).toNumber() : message.purgeCount;
+                                object.purgeSucceeded = false;
+                            if (message.purgeSucceeded != null && message.hasOwnProperty("purgeSucceeded"))
+                                object.purgeSucceeded = message.purgeSucceeded;
                             if (message.errorSamples && message.errorSamples.length) {
                                 object.errorSamples = [];
                                 for (var j = 0; j < message.errorSamples.length; ++j)
@@ -18899,53 +22729,53 @@
                         };
     
                         /**
-                         * Converts this PurgeSuggestionDenyListEntriesResponse to JSON.
+                         * Converts this PurgeCompletionSuggestionsResponse to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        PurgeSuggestionDenyListEntriesResponse.prototype.toJSON = function toJSON() {
+                        PurgeCompletionSuggestionsResponse.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for PurgeSuggestionDenyListEntriesResponse
+                         * Gets the default type url for PurgeCompletionSuggestionsResponse
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        PurgeSuggestionDenyListEntriesResponse.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        PurgeCompletionSuggestionsResponse.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesResponse";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse";
                         };
     
-                        return PurgeSuggestionDenyListEntriesResponse;
+                        return PurgeCompletionSuggestionsResponse;
                     })();
     
-                    v1.PurgeSuggestionDenyListEntriesMetadata = (function() {
+                    v1.PurgeCompletionSuggestionsMetadata = (function() {
     
                         /**
-                         * Properties of a PurgeSuggestionDenyListEntriesMetadata.
+                         * Properties of a PurgeCompletionSuggestionsMetadata.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @interface IPurgeSuggestionDenyListEntriesMetadata
-                         * @property {google.protobuf.ITimestamp|null} [createTime] PurgeSuggestionDenyListEntriesMetadata createTime
-                         * @property {google.protobuf.ITimestamp|null} [updateTime] PurgeSuggestionDenyListEntriesMetadata updateTime
+                         * @interface IPurgeCompletionSuggestionsMetadata
+                         * @property {google.protobuf.ITimestamp|null} [createTime] PurgeCompletionSuggestionsMetadata createTime
+                         * @property {google.protobuf.ITimestamp|null} [updateTime] PurgeCompletionSuggestionsMetadata updateTime
                          */
     
                         /**
-                         * Constructs a new PurgeSuggestionDenyListEntriesMetadata.
+                         * Constructs a new PurgeCompletionSuggestionsMetadata.
                          * @memberof google.cloud.discoveryengine.v1
-                         * @classdesc Represents a PurgeSuggestionDenyListEntriesMetadata.
-                         * @implements IPurgeSuggestionDenyListEntriesMetadata
+                         * @classdesc Represents a PurgeCompletionSuggestionsMetadata.
+                         * @implements IPurgeCompletionSuggestionsMetadata
                          * @constructor
-                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesMetadata=} [properties] Properties to set
+                         * @param {google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsMetadata=} [properties] Properties to set
                          */
-                        function PurgeSuggestionDenyListEntriesMetadata(properties) {
+                        function PurgeCompletionSuggestionsMetadata(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -18953,43 +22783,43 @@
                         }
     
                         /**
-                         * PurgeSuggestionDenyListEntriesMetadata createTime.
+                         * PurgeCompletionSuggestionsMetadata createTime.
                          * @member {google.protobuf.ITimestamp|null|undefined} createTime
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata
                          * @instance
                          */
-                        PurgeSuggestionDenyListEntriesMetadata.prototype.createTime = null;
+                        PurgeCompletionSuggestionsMetadata.prototype.createTime = null;
     
                         /**
-                         * PurgeSuggestionDenyListEntriesMetadata updateTime.
+                         * PurgeCompletionSuggestionsMetadata updateTime.
                          * @member {google.protobuf.ITimestamp|null|undefined} updateTime
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata
                          * @instance
                          */
-                        PurgeSuggestionDenyListEntriesMetadata.prototype.updateTime = null;
+                        PurgeCompletionSuggestionsMetadata.prototype.updateTime = null;
     
                         /**
-                         * Creates a new PurgeSuggestionDenyListEntriesMetadata instance using the specified properties.
+                         * Creates a new PurgeCompletionSuggestionsMetadata instance using the specified properties.
                          * @function create
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesMetadata=} [properties] Properties to set
-                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata} PurgeSuggestionDenyListEntriesMetadata instance
+                         * @param {google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsMetadata=} [properties] Properties to set
+                         * @returns {google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata} PurgeCompletionSuggestionsMetadata instance
                          */
-                        PurgeSuggestionDenyListEntriesMetadata.create = function create(properties) {
-                            return new PurgeSuggestionDenyListEntriesMetadata(properties);
+                        PurgeCompletionSuggestionsMetadata.create = function create(properties) {
+                            return new PurgeCompletionSuggestionsMetadata(properties);
                         };
     
                         /**
-                         * Encodes the specified PurgeSuggestionDenyListEntriesMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata.verify|verify} messages.
+                         * Encodes the specified PurgeCompletionSuggestionsMetadata message. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata.verify|verify} messages.
                          * @function encode
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesMetadata} message PurgeSuggestionDenyListEntriesMetadata message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsMetadata} message PurgeCompletionSuggestionsMetadata message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        PurgeSuggestionDenyListEntriesMetadata.encode = function encode(message, writer) {
+                        PurgeCompletionSuggestionsMetadata.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
                             if (message.createTime != null && Object.hasOwnProperty.call(message, "createTime"))
@@ -19000,33 +22830,33 @@
                         };
     
                         /**
-                         * Encodes the specified PurgeSuggestionDenyListEntriesMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata.verify|verify} messages.
+                         * Encodes the specified PurgeCompletionSuggestionsMetadata message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.IPurgeSuggestionDenyListEntriesMetadata} message PurgeSuggestionDenyListEntriesMetadata message or plain object to encode
+                         * @param {google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsMetadata} message PurgeCompletionSuggestionsMetadata message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        PurgeSuggestionDenyListEntriesMetadata.encodeDelimited = function encodeDelimited(message, writer) {
+                        PurgeCompletionSuggestionsMetadata.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a PurgeSuggestionDenyListEntriesMetadata message from the specified reader or buffer.
+                         * Decodes a PurgeCompletionSuggestionsMetadata message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata} PurgeSuggestionDenyListEntriesMetadata
+                         * @returns {google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata} PurgeCompletionSuggestionsMetadata
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        PurgeSuggestionDenyListEntriesMetadata.decode = function decode(reader, length) {
+                        PurgeCompletionSuggestionsMetadata.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
@@ -19047,30 +22877,30 @@
                         };
     
                         /**
-                         * Decodes a PurgeSuggestionDenyListEntriesMetadata message from the specified reader or buffer, length delimited.
+                         * Decodes a PurgeCompletionSuggestionsMetadata message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata} PurgeSuggestionDenyListEntriesMetadata
+                         * @returns {google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata} PurgeCompletionSuggestionsMetadata
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        PurgeSuggestionDenyListEntriesMetadata.decodeDelimited = function decodeDelimited(reader) {
+                        PurgeCompletionSuggestionsMetadata.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a PurgeSuggestionDenyListEntriesMetadata message.
+                         * Verifies a PurgeCompletionSuggestionsMetadata message.
                          * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        PurgeSuggestionDenyListEntriesMetadata.verify = function verify(message) {
+                        PurgeCompletionSuggestionsMetadata.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
                             if (message.createTime != null && message.hasOwnProperty("createTime")) {
@@ -19087,40 +22917,40 @@
                         };
     
                         /**
-                         * Creates a PurgeSuggestionDenyListEntriesMetadata message from a plain object. Also converts values to their respective internal types.
+                         * Creates a PurgeCompletionSuggestionsMetadata message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata} PurgeSuggestionDenyListEntriesMetadata
+                         * @returns {google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata} PurgeCompletionSuggestionsMetadata
                          */
-                        PurgeSuggestionDenyListEntriesMetadata.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata)
+                        PurgeCompletionSuggestionsMetadata.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata)
                                 return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata();
+                            var message = new $root.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata();
                             if (object.createTime != null) {
                                 if (typeof object.createTime !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata.createTime: object expected");
+                                    throw TypeError(".google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata.createTime: object expected");
                                 message.createTime = $root.google.protobuf.Timestamp.fromObject(object.createTime);
                             }
                             if (object.updateTime != null) {
                                 if (typeof object.updateTime !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata.updateTime: object expected");
+                                    throw TypeError(".google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata.updateTime: object expected");
                                 message.updateTime = $root.google.protobuf.Timestamp.fromObject(object.updateTime);
                             }
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a PurgeSuggestionDenyListEntriesMetadata message. Also converts values to other types if specified.
+                         * Creates a plain object from a PurgeCompletionSuggestionsMetadata message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata
                          * @static
-                         * @param {google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata} message PurgeSuggestionDenyListEntriesMetadata
+                         * @param {google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata} message PurgeCompletionSuggestionsMetadata
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        PurgeSuggestionDenyListEntriesMetadata.toObject = function toObject(message, options) {
+                        PurgeCompletionSuggestionsMetadata.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
@@ -19136,32 +22966,32 @@
                         };
     
                         /**
-                         * Converts this PurgeSuggestionDenyListEntriesMetadata to JSON.
+                         * Converts this PurgeCompletionSuggestionsMetadata to JSON.
                          * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        PurgeSuggestionDenyListEntriesMetadata.prototype.toJSON = function toJSON() {
+                        PurgeCompletionSuggestionsMetadata.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for PurgeSuggestionDenyListEntriesMetadata
+                         * Gets the default type url for PurgeCompletionSuggestionsMetadata
                          * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
+                         * @memberof google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        PurgeSuggestionDenyListEntriesMetadata.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        PurgeCompletionSuggestionsMetadata.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata";
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata";
                         };
     
-                        return PurgeSuggestionDenyListEntriesMetadata;
+                        return PurgeCompletionSuggestionsMetadata;
                     })();
     
                     v1.Condition = (function() {
@@ -24459,6 +28289,7 @@
                          * @property {string|null} [canonicalFilter] SearchRequest canonicalFilter
                          * @property {string|null} [orderBy] SearchRequest orderBy
                          * @property {google.cloud.discoveryengine.v1.IUserInfo|null} [userInfo] SearchRequest userInfo
+                         * @property {string|null} [languageCode] SearchRequest languageCode
                          * @property {Array.<google.cloud.discoveryengine.v1.SearchRequest.IFacetSpec>|null} [facetSpecs] SearchRequest facetSpecs
                          * @property {google.cloud.discoveryengine.v1.SearchRequest.IBoostSpec|null} [boostSpec] SearchRequest boostSpec
                          * @property {Object.<string,google.protobuf.IValue>|null} [params] SearchRequest params
@@ -24468,6 +28299,9 @@
                          * @property {google.cloud.discoveryengine.v1.SearchRequest.IContentSearchSpec|null} [contentSearchSpec] SearchRequest contentSearchSpec
                          * @property {boolean|null} [safeSearch] SearchRequest safeSearch
                          * @property {Object.<string,string>|null} [userLabels] SearchRequest userLabels
+                         * @property {google.cloud.discoveryengine.v1.SearchRequest.ISearchAsYouTypeSpec|null} [searchAsYouTypeSpec] SearchRequest searchAsYouTypeSpec
+                         * @property {string|null} [session] SearchRequest session
+                         * @property {google.cloud.discoveryengine.v1.SearchRequest.ISessionSpec|null} [sessionSpec] SearchRequest sessionSpec
                          */
     
                         /**
@@ -24585,6 +28419,14 @@
                          */
                         SearchRequest.prototype.userInfo = null;
     
+                        /**
+                         * SearchRequest languageCode.
+                         * @member {string} languageCode
+                         * @memberof google.cloud.discoveryengine.v1.SearchRequest
+                         * @instance
+                         */
+                        SearchRequest.prototype.languageCode = "";
+    
                         /**
                          * SearchRequest facetSpecs.
                          * @member {Array.<google.cloud.discoveryengine.v1.SearchRequest.IFacetSpec>} facetSpecs
@@ -24657,6 +28499,30 @@
                          */
                         SearchRequest.prototype.userLabels = $util.emptyObject;
     
+                        /**
+                         * SearchRequest searchAsYouTypeSpec.
+                         * @member {google.cloud.discoveryengine.v1.SearchRequest.ISearchAsYouTypeSpec|null|undefined} searchAsYouTypeSpec
+                         * @memberof google.cloud.discoveryengine.v1.SearchRequest
+                         * @instance
+                         */
+                        SearchRequest.prototype.searchAsYouTypeSpec = null;
+    
+                        /**
+                         * SearchRequest session.
+                         * @member {string} session
+                         * @memberof google.cloud.discoveryengine.v1.SearchRequest
+                         * @instance
+                         */
+                        SearchRequest.prototype.session = "";
+    
+                        /**
+                         * SearchRequest sessionSpec.
+                         * @member {google.cloud.discoveryengine.v1.SearchRequest.ISessionSpec|null|undefined} sessionSpec
+                         * @memberof google.cloud.discoveryengine.v1.SearchRequest
+                         * @instance
+                         */
+                        SearchRequest.prototype.sessionSpec = null;
+    
                         /**
                          * Creates a new SearchRequest instance using the specified properties.
                          * @function create
@@ -24726,9 +28592,17 @@
                                 $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.encode(message.contentSearchSpec, writer.uint32(/* id 24, wireType 2 =*/194).fork()).ldelim();
                             if (message.canonicalFilter != null && Object.hasOwnProperty.call(message, "canonicalFilter"))
                                 writer.uint32(/* id 29, wireType 2 =*/234).string(message.canonicalFilter);
+                            if (message.searchAsYouTypeSpec != null && Object.hasOwnProperty.call(message, "searchAsYouTypeSpec"))
+                                $root.google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec.encode(message.searchAsYouTypeSpec, writer.uint32(/* id 31, wireType 2 =*/250).fork()).ldelim();
                             if (message.dataStoreSpecs != null && message.dataStoreSpecs.length)
                                 for (var i = 0; i < message.dataStoreSpecs.length; ++i)
                                     $root.google.cloud.discoveryengine.v1.SearchRequest.DataStoreSpec.encode(message.dataStoreSpecs[i], writer.uint32(/* id 32, wireType 2 =*/258).fork()).ldelim();
+                            if (message.languageCode != null && Object.hasOwnProperty.call(message, "languageCode"))
+                                writer.uint32(/* id 35, wireType 2 =*/282).string(message.languageCode);
+                            if (message.session != null && Object.hasOwnProperty.call(message, "session"))
+                                writer.uint32(/* id 41, wireType 2 =*/330).string(message.session);
+                            if (message.sessionSpec != null && Object.hasOwnProperty.call(message, "sessionSpec"))
+                                $root.google.cloud.discoveryengine.v1.SearchRequest.SessionSpec.encode(message.sessionSpec, writer.uint32(/* id 42, wireType 2 =*/338).fork()).ldelim();
                             return writer;
                         };
     
@@ -24813,6 +28687,10 @@
                                         message.userInfo = $root.google.cloud.discoveryengine.v1.UserInfo.decode(reader, reader.uint32());
                                         break;
                                     }
+                                case 35: {
+                                        message.languageCode = reader.string();
+                                        break;
+                                    }
                                 case 9: {
                                         if (!(message.facetSpecs && message.facetSpecs.length))
                                             message.facetSpecs = [];
@@ -24889,6 +28767,18 @@
                                         message.userLabels[key] = value;
                                         break;
                                     }
+                                case 31: {
+                                        message.searchAsYouTypeSpec = $root.google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 41: {
+                                        message.session = reader.string();
+                                        break;
+                                    }
+                                case 42: {
+                                        message.sessionSpec = $root.google.cloud.discoveryengine.v1.SearchRequest.SessionSpec.decode(reader, reader.uint32());
+                                        break;
+                                    }
                                 default:
                                     reader.skipType(tag & 7);
                                     break;
@@ -24970,6 +28860,9 @@
                                 if (error)
                                     return "userInfo." + error;
                             }
+                            if (message.languageCode != null && message.hasOwnProperty("languageCode"))
+                                if (!$util.isString(message.languageCode))
+                                    return "languageCode: string expected";
                             if (message.facetSpecs != null && message.hasOwnProperty("facetSpecs")) {
                                 if (!Array.isArray(message.facetSpecs))
                                     return "facetSpecs: array expected";
@@ -25023,6 +28916,19 @@
                                     if (!$util.isString(message.userLabels[key[i]]))
                                         return "userLabels: string{k:string} expected";
                             }
+                            if (message.searchAsYouTypeSpec != null && message.hasOwnProperty("searchAsYouTypeSpec")) {
+                                var error = $root.google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec.verify(message.searchAsYouTypeSpec);
+                                if (error)
+                                    return "searchAsYouTypeSpec." + error;
+                            }
+                            if (message.session != null && message.hasOwnProperty("session"))
+                                if (!$util.isString(message.session))
+                                    return "session: string expected";
+                            if (message.sessionSpec != null && message.hasOwnProperty("sessionSpec")) {
+                                var error = $root.google.cloud.discoveryengine.v1.SearchRequest.SessionSpec.verify(message.sessionSpec);
+                                if (error)
+                                    return "sessionSpec." + error;
+                            }
                             return null;
                         };
     
@@ -25076,6 +28982,8 @@
                                     throw TypeError(".google.cloud.discoveryengine.v1.SearchRequest.userInfo: object expected");
                                 message.userInfo = $root.google.cloud.discoveryengine.v1.UserInfo.fromObject(object.userInfo);
                             }
+                            if (object.languageCode != null)
+                                message.languageCode = String(object.languageCode);
                             if (object.facetSpecs) {
                                 if (!Array.isArray(object.facetSpecs))
                                     throw TypeError(".google.cloud.discoveryengine.v1.SearchRequest.facetSpecs: array expected");
@@ -25127,6 +29035,18 @@
                                 for (var keys = Object.keys(object.userLabels), i = 0; i < keys.length; ++i)
                                     message.userLabels[keys[i]] = String(object.userLabels[keys[i]]);
                             }
+                            if (object.searchAsYouTypeSpec != null) {
+                                if (typeof object.searchAsYouTypeSpec !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.SearchRequest.searchAsYouTypeSpec: object expected");
+                                message.searchAsYouTypeSpec = $root.google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec.fromObject(object.searchAsYouTypeSpec);
+                            }
+                            if (object.session != null)
+                                message.session = String(object.session);
+                            if (object.sessionSpec != null) {
+                                if (typeof object.sessionSpec !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.SearchRequest.sessionSpec: object expected");
+                                message.sessionSpec = $root.google.cloud.discoveryengine.v1.SearchRequest.SessionSpec.fromObject(object.sessionSpec);
+                            }
                             return message;
                         };
     
@@ -25169,6 +29089,10 @@
                                 object.userInfo = null;
                                 object.contentSearchSpec = null;
                                 object.canonicalFilter = "";
+                                object.searchAsYouTypeSpec = null;
+                                object.languageCode = "";
+                                object.session = "";
+                                object.sessionSpec = null;
                             }
                             if (message.servingConfig != null && message.hasOwnProperty("servingConfig"))
                                 object.servingConfig = message.servingConfig;
@@ -25220,11 +29144,19 @@
                                 object.contentSearchSpec = $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.toObject(message.contentSearchSpec, options);
                             if (message.canonicalFilter != null && message.hasOwnProperty("canonicalFilter"))
                                 object.canonicalFilter = message.canonicalFilter;
+                            if (message.searchAsYouTypeSpec != null && message.hasOwnProperty("searchAsYouTypeSpec"))
+                                object.searchAsYouTypeSpec = $root.google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec.toObject(message.searchAsYouTypeSpec, options);
                             if (message.dataStoreSpecs && message.dataStoreSpecs.length) {
                                 object.dataStoreSpecs = [];
                                 for (var j = 0; j < message.dataStoreSpecs.length; ++j)
                                     object.dataStoreSpecs[j] = $root.google.cloud.discoveryengine.v1.SearchRequest.DataStoreSpec.toObject(message.dataStoreSpecs[j], options);
                             }
+                            if (message.languageCode != null && message.hasOwnProperty("languageCode"))
+                                object.languageCode = message.languageCode;
+                            if (message.session != null && message.hasOwnProperty("session"))
+                                object.session = message.session;
+                            if (message.sessionSpec != null && message.hasOwnProperty("sessionSpec"))
+                                object.sessionSpec = $root.google.cloud.discoveryengine.v1.SearchRequest.SessionSpec.toObject(message.sessionSpec, options);
                             return object;
                         };
     
@@ -27356,6 +31288,8 @@
                              * @property {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ISnippetSpec|null} [snippetSpec] ContentSearchSpec snippetSpec
                              * @property {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ISummarySpec|null} [summarySpec] ContentSearchSpec summarySpec
                              * @property {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.IExtractiveContentSpec|null} [extractiveContentSpec] ContentSearchSpec extractiveContentSpec
+                             * @property {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SearchResultMode|null} [searchResultMode] ContentSearchSpec searchResultMode
+                             * @property {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.IChunkSpec|null} [chunkSpec] ContentSearchSpec chunkSpec
                              */
     
                             /**
@@ -27397,6 +31331,22 @@
                              */
                             ContentSearchSpec.prototype.extractiveContentSpec = null;
     
+                            /**
+                             * ContentSearchSpec searchResultMode.
+                             * @member {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SearchResultMode} searchResultMode
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec
+                             * @instance
+                             */
+                            ContentSearchSpec.prototype.searchResultMode = 0;
+    
+                            /**
+                             * ContentSearchSpec chunkSpec.
+                             * @member {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.IChunkSpec|null|undefined} chunkSpec
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec
+                             * @instance
+                             */
+                            ContentSearchSpec.prototype.chunkSpec = null;
+    
                             /**
                              * Creates a new ContentSearchSpec instance using the specified properties.
                              * @function create
@@ -27427,6 +31377,10 @@
                                     $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SummarySpec.encode(message.summarySpec, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
                                 if (message.extractiveContentSpec != null && Object.hasOwnProperty.call(message, "extractiveContentSpec"))
                                     $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec.encode(message.extractiveContentSpec, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
+                                if (message.searchResultMode != null && Object.hasOwnProperty.call(message, "searchResultMode"))
+                                    writer.uint32(/* id 4, wireType 0 =*/32).int32(message.searchResultMode);
+                                if (message.chunkSpec != null && Object.hasOwnProperty.call(message, "chunkSpec"))
+                                    $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec.encode(message.chunkSpec, writer.uint32(/* id 5, wireType 2 =*/42).fork()).ldelim();
                                 return writer;
                             };
     
@@ -27473,6 +31427,14 @@
                                             message.extractiveContentSpec = $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec.decode(reader, reader.uint32());
                                             break;
                                         }
+                                    case 4: {
+                                            message.searchResultMode = reader.int32();
+                                            break;
+                                        }
+                                    case 5: {
+                                            message.chunkSpec = $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec.decode(reader, reader.uint32());
+                                            break;
+                                        }
                                     default:
                                         reader.skipType(tag & 7);
                                         break;
@@ -27523,6 +31485,20 @@
                                     if (error)
                                         return "extractiveContentSpec." + error;
                                 }
+                                if (message.searchResultMode != null && message.hasOwnProperty("searchResultMode"))
+                                    switch (message.searchResultMode) {
+                                    default:
+                                        return "searchResultMode: enum value expected";
+                                    case 0:
+                                    case 1:
+                                    case 2:
+                                        break;
+                                    }
+                                if (message.chunkSpec != null && message.hasOwnProperty("chunkSpec")) {
+                                    var error = $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec.verify(message.chunkSpec);
+                                    if (error)
+                                        return "chunkSpec." + error;
+                                }
                                 return null;
                             };
     
@@ -27553,6 +31529,31 @@
                                         throw TypeError(".google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.extractiveContentSpec: object expected");
                                     message.extractiveContentSpec = $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec.fromObject(object.extractiveContentSpec);
                                 }
+                                switch (object.searchResultMode) {
+                                default:
+                                    if (typeof object.searchResultMode === "number") {
+                                        message.searchResultMode = object.searchResultMode;
+                                        break;
+                                    }
+                                    break;
+                                case "SEARCH_RESULT_MODE_UNSPECIFIED":
+                                case 0:
+                                    message.searchResultMode = 0;
+                                    break;
+                                case "DOCUMENTS":
+                                case 1:
+                                    message.searchResultMode = 1;
+                                    break;
+                                case "CHUNKS":
+                                case 2:
+                                    message.searchResultMode = 2;
+                                    break;
+                                }
+                                if (object.chunkSpec != null) {
+                                    if (typeof object.chunkSpec !== "object")
+                                        throw TypeError(".google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.chunkSpec: object expected");
+                                    message.chunkSpec = $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec.fromObject(object.chunkSpec);
+                                }
                                 return message;
                             };
     
@@ -27573,6 +31574,8 @@
                                     object.snippetSpec = null;
                                     object.summarySpec = null;
                                     object.extractiveContentSpec = null;
+                                    object.searchResultMode = options.enums === String ? "SEARCH_RESULT_MODE_UNSPECIFIED" : 0;
+                                    object.chunkSpec = null;
                                 }
                                 if (message.snippetSpec != null && message.hasOwnProperty("snippetSpec"))
                                     object.snippetSpec = $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SnippetSpec.toObject(message.snippetSpec, options);
@@ -27580,6 +31583,10 @@
                                     object.summarySpec = $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SummarySpec.toObject(message.summarySpec, options);
                                 if (message.extractiveContentSpec != null && message.hasOwnProperty("extractiveContentSpec"))
                                     object.extractiveContentSpec = $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec.toObject(message.extractiveContentSpec, options);
+                                if (message.searchResultMode != null && message.hasOwnProperty("searchResultMode"))
+                                    object.searchResultMode = options.enums === String ? $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SearchResultMode[message.searchResultMode] === undefined ? message.searchResultMode : $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SearchResultMode[message.searchResultMode] : message.searchResultMode;
+                                if (message.chunkSpec != null && message.hasOwnProperty("chunkSpec"))
+                                    object.chunkSpec = $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec.toObject(message.chunkSpec, options);
                                 return object;
                             };
     
@@ -28746,54 +32753,305 @@
                                 };
     
                                 /**
-                                 * Encodes the specified ExtractiveContentSpec message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec.verify|verify} messages.
+                                 * Encodes the specified ExtractiveContentSpec message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec.verify|verify} messages.
+                                 * @function encodeDelimited
+                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec
+                                 * @static
+                                 * @param {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.IExtractiveContentSpec} message ExtractiveContentSpec message or plain object to encode
+                                 * @param {$protobuf.Writer} [writer] Writer to encode to
+                                 * @returns {$protobuf.Writer} Writer
+                                 */
+                                ExtractiveContentSpec.encodeDelimited = function encodeDelimited(message, writer) {
+                                    return this.encode(message, writer).ldelim();
+                                };
+    
+                                /**
+                                 * Decodes an ExtractiveContentSpec message from the specified reader or buffer.
+                                 * @function decode
+                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec
+                                 * @static
+                                 * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                                 * @param {number} [length] Message length if known beforehand
+                                 * @returns {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec} ExtractiveContentSpec
+                                 * @throws {Error} If the payload is not a reader or valid buffer
+                                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                                 */
+                                ExtractiveContentSpec.decode = function decode(reader, length) {
+                                    if (!(reader instanceof $Reader))
+                                        reader = $Reader.create(reader);
+                                    var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec();
+                                    while (reader.pos < end) {
+                                        var tag = reader.uint32();
+                                        switch (tag >>> 3) {
+                                        case 1: {
+                                                message.maxExtractiveAnswerCount = reader.int32();
+                                                break;
+                                            }
+                                        case 2: {
+                                                message.maxExtractiveSegmentCount = reader.int32();
+                                                break;
+                                            }
+                                        case 3: {
+                                                message.returnExtractiveSegmentScore = reader.bool();
+                                                break;
+                                            }
+                                        case 4: {
+                                                message.numPreviousSegments = reader.int32();
+                                                break;
+                                            }
+                                        case 5: {
+                                                message.numNextSegments = reader.int32();
+                                                break;
+                                            }
+                                        default:
+                                            reader.skipType(tag & 7);
+                                            break;
+                                        }
+                                    }
+                                    return message;
+                                };
+    
+                                /**
+                                 * Decodes an ExtractiveContentSpec message from the specified reader or buffer, length delimited.
+                                 * @function decodeDelimited
+                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec
+                                 * @static
+                                 * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                                 * @returns {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec} ExtractiveContentSpec
+                                 * @throws {Error} If the payload is not a reader or valid buffer
+                                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                                 */
+                                ExtractiveContentSpec.decodeDelimited = function decodeDelimited(reader) {
+                                    if (!(reader instanceof $Reader))
+                                        reader = new $Reader(reader);
+                                    return this.decode(reader, reader.uint32());
+                                };
+    
+                                /**
+                                 * Verifies an ExtractiveContentSpec message.
+                                 * @function verify
+                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec
+                                 * @static
+                                 * @param {Object.<string,*>} message Plain object to verify
+                                 * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                                 */
+                                ExtractiveContentSpec.verify = function verify(message) {
+                                    if (typeof message !== "object" || message === null)
+                                        return "object expected";
+                                    if (message.maxExtractiveAnswerCount != null && message.hasOwnProperty("maxExtractiveAnswerCount"))
+                                        if (!$util.isInteger(message.maxExtractiveAnswerCount))
+                                            return "maxExtractiveAnswerCount: integer expected";
+                                    if (message.maxExtractiveSegmentCount != null && message.hasOwnProperty("maxExtractiveSegmentCount"))
+                                        if (!$util.isInteger(message.maxExtractiveSegmentCount))
+                                            return "maxExtractiveSegmentCount: integer expected";
+                                    if (message.returnExtractiveSegmentScore != null && message.hasOwnProperty("returnExtractiveSegmentScore"))
+                                        if (typeof message.returnExtractiveSegmentScore !== "boolean")
+                                            return "returnExtractiveSegmentScore: boolean expected";
+                                    if (message.numPreviousSegments != null && message.hasOwnProperty("numPreviousSegments"))
+                                        if (!$util.isInteger(message.numPreviousSegments))
+                                            return "numPreviousSegments: integer expected";
+                                    if (message.numNextSegments != null && message.hasOwnProperty("numNextSegments"))
+                                        if (!$util.isInteger(message.numNextSegments))
+                                            return "numNextSegments: integer expected";
+                                    return null;
+                                };
+    
+                                /**
+                                 * Creates an ExtractiveContentSpec message from a plain object. Also converts values to their respective internal types.
+                                 * @function fromObject
+                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec
+                                 * @static
+                                 * @param {Object.<string,*>} object Plain object
+                                 * @returns {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec} ExtractiveContentSpec
+                                 */
+                                ExtractiveContentSpec.fromObject = function fromObject(object) {
+                                    if (object instanceof $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec)
+                                        return object;
+                                    var message = new $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec();
+                                    if (object.maxExtractiveAnswerCount != null)
+                                        message.maxExtractiveAnswerCount = object.maxExtractiveAnswerCount | 0;
+                                    if (object.maxExtractiveSegmentCount != null)
+                                        message.maxExtractiveSegmentCount = object.maxExtractiveSegmentCount | 0;
+                                    if (object.returnExtractiveSegmentScore != null)
+                                        message.returnExtractiveSegmentScore = Boolean(object.returnExtractiveSegmentScore);
+                                    if (object.numPreviousSegments != null)
+                                        message.numPreviousSegments = object.numPreviousSegments | 0;
+                                    if (object.numNextSegments != null)
+                                        message.numNextSegments = object.numNextSegments | 0;
+                                    return message;
+                                };
+    
+                                /**
+                                 * Creates a plain object from an ExtractiveContentSpec message. Also converts values to other types if specified.
+                                 * @function toObject
+                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec
+                                 * @static
+                                 * @param {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec} message ExtractiveContentSpec
+                                 * @param {$protobuf.IConversionOptions} [options] Conversion options
+                                 * @returns {Object.<string,*>} Plain object
+                                 */
+                                ExtractiveContentSpec.toObject = function toObject(message, options) {
+                                    if (!options)
+                                        options = {};
+                                    var object = {};
+                                    if (options.defaults) {
+                                        object.maxExtractiveAnswerCount = 0;
+                                        object.maxExtractiveSegmentCount = 0;
+                                        object.returnExtractiveSegmentScore = false;
+                                        object.numPreviousSegments = 0;
+                                        object.numNextSegments = 0;
+                                    }
+                                    if (message.maxExtractiveAnswerCount != null && message.hasOwnProperty("maxExtractiveAnswerCount"))
+                                        object.maxExtractiveAnswerCount = message.maxExtractiveAnswerCount;
+                                    if (message.maxExtractiveSegmentCount != null && message.hasOwnProperty("maxExtractiveSegmentCount"))
+                                        object.maxExtractiveSegmentCount = message.maxExtractiveSegmentCount;
+                                    if (message.returnExtractiveSegmentScore != null && message.hasOwnProperty("returnExtractiveSegmentScore"))
+                                        object.returnExtractiveSegmentScore = message.returnExtractiveSegmentScore;
+                                    if (message.numPreviousSegments != null && message.hasOwnProperty("numPreviousSegments"))
+                                        object.numPreviousSegments = message.numPreviousSegments;
+                                    if (message.numNextSegments != null && message.hasOwnProperty("numNextSegments"))
+                                        object.numNextSegments = message.numNextSegments;
+                                    return object;
+                                };
+    
+                                /**
+                                 * Converts this ExtractiveContentSpec to JSON.
+                                 * @function toJSON
+                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec
+                                 * @instance
+                                 * @returns {Object.<string,*>} JSON object
+                                 */
+                                ExtractiveContentSpec.prototype.toJSON = function toJSON() {
+                                    return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                                };
+    
+                                /**
+                                 * Gets the default type url for ExtractiveContentSpec
+                                 * @function getTypeUrl
+                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec
+                                 * @static
+                                 * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                                 * @returns {string} The default type url
+                                 */
+                                ExtractiveContentSpec.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                                    if (typeUrlPrefix === undefined) {
+                                        typeUrlPrefix = "type.googleapis.com";
+                                    }
+                                    return typeUrlPrefix + "/google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec";
+                                };
+    
+                                return ExtractiveContentSpec;
+                            })();
+    
+                            ContentSearchSpec.ChunkSpec = (function() {
+    
+                                /**
+                                 * Properties of a ChunkSpec.
+                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec
+                                 * @interface IChunkSpec
+                                 * @property {number|null} [numPreviousChunks] ChunkSpec numPreviousChunks
+                                 * @property {number|null} [numNextChunks] ChunkSpec numNextChunks
+                                 */
+    
+                                /**
+                                 * Constructs a new ChunkSpec.
+                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec
+                                 * @classdesc Represents a ChunkSpec.
+                                 * @implements IChunkSpec
+                                 * @constructor
+                                 * @param {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.IChunkSpec=} [properties] Properties to set
+                                 */
+                                function ChunkSpec(properties) {
+                                    if (properties)
+                                        for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                            if (properties[keys[i]] != null)
+                                                this[keys[i]] = properties[keys[i]];
+                                }
+    
+                                /**
+                                 * ChunkSpec numPreviousChunks.
+                                 * @member {number} numPreviousChunks
+                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec
+                                 * @instance
+                                 */
+                                ChunkSpec.prototype.numPreviousChunks = 0;
+    
+                                /**
+                                 * ChunkSpec numNextChunks.
+                                 * @member {number} numNextChunks
+                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec
+                                 * @instance
+                                 */
+                                ChunkSpec.prototype.numNextChunks = 0;
+    
+                                /**
+                                 * Creates a new ChunkSpec instance using the specified properties.
+                                 * @function create
+                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec
+                                 * @static
+                                 * @param {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.IChunkSpec=} [properties] Properties to set
+                                 * @returns {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec} ChunkSpec instance
+                                 */
+                                ChunkSpec.create = function create(properties) {
+                                    return new ChunkSpec(properties);
+                                };
+    
+                                /**
+                                 * Encodes the specified ChunkSpec message. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec.verify|verify} messages.
+                                 * @function encode
+                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec
+                                 * @static
+                                 * @param {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.IChunkSpec} message ChunkSpec message or plain object to encode
+                                 * @param {$protobuf.Writer} [writer] Writer to encode to
+                                 * @returns {$protobuf.Writer} Writer
+                                 */
+                                ChunkSpec.encode = function encode(message, writer) {
+                                    if (!writer)
+                                        writer = $Writer.create();
+                                    if (message.numPreviousChunks != null && Object.hasOwnProperty.call(message, "numPreviousChunks"))
+                                        writer.uint32(/* id 1, wireType 0 =*/8).int32(message.numPreviousChunks);
+                                    if (message.numNextChunks != null && Object.hasOwnProperty.call(message, "numNextChunks"))
+                                        writer.uint32(/* id 2, wireType 0 =*/16).int32(message.numNextChunks);
+                                    return writer;
+                                };
+    
+                                /**
+                                 * Encodes the specified ChunkSpec message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec.verify|verify} messages.
                                  * @function encodeDelimited
-                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec
+                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec
                                  * @static
-                                 * @param {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.IExtractiveContentSpec} message ExtractiveContentSpec message or plain object to encode
+                                 * @param {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.IChunkSpec} message ChunkSpec message or plain object to encode
                                  * @param {$protobuf.Writer} [writer] Writer to encode to
                                  * @returns {$protobuf.Writer} Writer
                                  */
-                                ExtractiveContentSpec.encodeDelimited = function encodeDelimited(message, writer) {
+                                ChunkSpec.encodeDelimited = function encodeDelimited(message, writer) {
                                     return this.encode(message, writer).ldelim();
                                 };
     
                                 /**
-                                 * Decodes an ExtractiveContentSpec message from the specified reader or buffer.
+                                 * Decodes a ChunkSpec message from the specified reader or buffer.
                                  * @function decode
-                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec
+                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec
                                  * @static
                                  * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                                  * @param {number} [length] Message length if known beforehand
-                                 * @returns {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec} ExtractiveContentSpec
+                                 * @returns {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec} ChunkSpec
                                  * @throws {Error} If the payload is not a reader or valid buffer
                                  * @throws {$protobuf.util.ProtocolError} If required fields are missing
                                  */
-                                ExtractiveContentSpec.decode = function decode(reader, length) {
+                                ChunkSpec.decode = function decode(reader, length) {
                                     if (!(reader instanceof $Reader))
                                         reader = $Reader.create(reader);
-                                    var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec();
+                                    var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec();
                                     while (reader.pos < end) {
                                         var tag = reader.uint32();
                                         switch (tag >>> 3) {
                                         case 1: {
-                                                message.maxExtractiveAnswerCount = reader.int32();
+                                                message.numPreviousChunks = reader.int32();
                                                 break;
                                             }
                                         case 2: {
-                                                message.maxExtractiveSegmentCount = reader.int32();
-                                                break;
-                                            }
-                                        case 3: {
-                                                message.returnExtractiveSegmentScore = reader.bool();
-                                                break;
-                                            }
-                                        case 4: {
-                                                message.numPreviousSegments = reader.int32();
-                                                break;
-                                            }
-                                        case 5: {
-                                                message.numNextSegments = reader.int32();
+                                                message.numNextChunks = reader.int32();
                                                 break;
                                             }
                                         default:
@@ -28805,140 +33063,620 @@
                                 };
     
                                 /**
-                                 * Decodes an ExtractiveContentSpec message from the specified reader or buffer, length delimited.
+                                 * Decodes a ChunkSpec message from the specified reader or buffer, length delimited.
                                  * @function decodeDelimited
-                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec
+                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec
                                  * @static
                                  * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                                 * @returns {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec} ExtractiveContentSpec
+                                 * @returns {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec} ChunkSpec
                                  * @throws {Error} If the payload is not a reader or valid buffer
                                  * @throws {$protobuf.util.ProtocolError} If required fields are missing
                                  */
-                                ExtractiveContentSpec.decodeDelimited = function decodeDelimited(reader) {
+                                ChunkSpec.decodeDelimited = function decodeDelimited(reader) {
                                     if (!(reader instanceof $Reader))
                                         reader = new $Reader(reader);
                                     return this.decode(reader, reader.uint32());
                                 };
     
                                 /**
-                                 * Verifies an ExtractiveContentSpec message.
+                                 * Verifies a ChunkSpec message.
                                  * @function verify
-                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec
+                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec
                                  * @static
                                  * @param {Object.<string,*>} message Plain object to verify
                                  * @returns {string|null} `null` if valid, otherwise the reason why it is not
                                  */
-                                ExtractiveContentSpec.verify = function verify(message) {
+                                ChunkSpec.verify = function verify(message) {
                                     if (typeof message !== "object" || message === null)
                                         return "object expected";
-                                    if (message.maxExtractiveAnswerCount != null && message.hasOwnProperty("maxExtractiveAnswerCount"))
-                                        if (!$util.isInteger(message.maxExtractiveAnswerCount))
-                                            return "maxExtractiveAnswerCount: integer expected";
-                                    if (message.maxExtractiveSegmentCount != null && message.hasOwnProperty("maxExtractiveSegmentCount"))
-                                        if (!$util.isInteger(message.maxExtractiveSegmentCount))
-                                            return "maxExtractiveSegmentCount: integer expected";
-                                    if (message.returnExtractiveSegmentScore != null && message.hasOwnProperty("returnExtractiveSegmentScore"))
-                                        if (typeof message.returnExtractiveSegmentScore !== "boolean")
-                                            return "returnExtractiveSegmentScore: boolean expected";
-                                    if (message.numPreviousSegments != null && message.hasOwnProperty("numPreviousSegments"))
-                                        if (!$util.isInteger(message.numPreviousSegments))
-                                            return "numPreviousSegments: integer expected";
-                                    if (message.numNextSegments != null && message.hasOwnProperty("numNextSegments"))
-                                        if (!$util.isInteger(message.numNextSegments))
-                                            return "numNextSegments: integer expected";
+                                    if (message.numPreviousChunks != null && message.hasOwnProperty("numPreviousChunks"))
+                                        if (!$util.isInteger(message.numPreviousChunks))
+                                            return "numPreviousChunks: integer expected";
+                                    if (message.numNextChunks != null && message.hasOwnProperty("numNextChunks"))
+                                        if (!$util.isInteger(message.numNextChunks))
+                                            return "numNextChunks: integer expected";
                                     return null;
                                 };
     
                                 /**
-                                 * Creates an ExtractiveContentSpec message from a plain object. Also converts values to their respective internal types.
+                                 * Creates a ChunkSpec message from a plain object. Also converts values to their respective internal types.
                                  * @function fromObject
-                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec
+                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec
                                  * @static
                                  * @param {Object.<string,*>} object Plain object
-                                 * @returns {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec} ExtractiveContentSpec
+                                 * @returns {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec} ChunkSpec
                                  */
-                                ExtractiveContentSpec.fromObject = function fromObject(object) {
-                                    if (object instanceof $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec)
+                                ChunkSpec.fromObject = function fromObject(object) {
+                                    if (object instanceof $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec)
                                         return object;
-                                    var message = new $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec();
-                                    if (object.maxExtractiveAnswerCount != null)
-                                        message.maxExtractiveAnswerCount = object.maxExtractiveAnswerCount | 0;
-                                    if (object.maxExtractiveSegmentCount != null)
-                                        message.maxExtractiveSegmentCount = object.maxExtractiveSegmentCount | 0;
-                                    if (object.returnExtractiveSegmentScore != null)
-                                        message.returnExtractiveSegmentScore = Boolean(object.returnExtractiveSegmentScore);
-                                    if (object.numPreviousSegments != null)
-                                        message.numPreviousSegments = object.numPreviousSegments | 0;
-                                    if (object.numNextSegments != null)
-                                        message.numNextSegments = object.numNextSegments | 0;
+                                    var message = new $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec();
+                                    if (object.numPreviousChunks != null)
+                                        message.numPreviousChunks = object.numPreviousChunks | 0;
+                                    if (object.numNextChunks != null)
+                                        message.numNextChunks = object.numNextChunks | 0;
                                     return message;
                                 };
     
                                 /**
-                                 * Creates a plain object from an ExtractiveContentSpec message. Also converts values to other types if specified.
+                                 * Creates a plain object from a ChunkSpec message. Also converts values to other types if specified.
                                  * @function toObject
-                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec
+                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec
                                  * @static
-                                 * @param {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec} message ExtractiveContentSpec
+                                 * @param {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec} message ChunkSpec
                                  * @param {$protobuf.IConversionOptions} [options] Conversion options
                                  * @returns {Object.<string,*>} Plain object
                                  */
-                                ExtractiveContentSpec.toObject = function toObject(message, options) {
+                                ChunkSpec.toObject = function toObject(message, options) {
                                     if (!options)
                                         options = {};
                                     var object = {};
                                     if (options.defaults) {
-                                        object.maxExtractiveAnswerCount = 0;
-                                        object.maxExtractiveSegmentCount = 0;
-                                        object.returnExtractiveSegmentScore = false;
-                                        object.numPreviousSegments = 0;
-                                        object.numNextSegments = 0;
+                                        object.numPreviousChunks = 0;
+                                        object.numNextChunks = 0;
                                     }
-                                    if (message.maxExtractiveAnswerCount != null && message.hasOwnProperty("maxExtractiveAnswerCount"))
-                                        object.maxExtractiveAnswerCount = message.maxExtractiveAnswerCount;
-                                    if (message.maxExtractiveSegmentCount != null && message.hasOwnProperty("maxExtractiveSegmentCount"))
-                                        object.maxExtractiveSegmentCount = message.maxExtractiveSegmentCount;
-                                    if (message.returnExtractiveSegmentScore != null && message.hasOwnProperty("returnExtractiveSegmentScore"))
-                                        object.returnExtractiveSegmentScore = message.returnExtractiveSegmentScore;
-                                    if (message.numPreviousSegments != null && message.hasOwnProperty("numPreviousSegments"))
-                                        object.numPreviousSegments = message.numPreviousSegments;
-                                    if (message.numNextSegments != null && message.hasOwnProperty("numNextSegments"))
-                                        object.numNextSegments = message.numNextSegments;
+                                    if (message.numPreviousChunks != null && message.hasOwnProperty("numPreviousChunks"))
+                                        object.numPreviousChunks = message.numPreviousChunks;
+                                    if (message.numNextChunks != null && message.hasOwnProperty("numNextChunks"))
+                                        object.numNextChunks = message.numNextChunks;
                                     return object;
                                 };
     
                                 /**
-                                 * Converts this ExtractiveContentSpec to JSON.
+                                 * Converts this ChunkSpec to JSON.
                                  * @function toJSON
-                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec
+                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec
                                  * @instance
                                  * @returns {Object.<string,*>} JSON object
                                  */
-                                ExtractiveContentSpec.prototype.toJSON = function toJSON() {
+                                ChunkSpec.prototype.toJSON = function toJSON() {
                                     return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                                 };
     
                                 /**
-                                 * Gets the default type url for ExtractiveContentSpec
+                                 * Gets the default type url for ChunkSpec
                                  * @function getTypeUrl
-                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec
+                                 * @memberof google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec
                                  * @static
                                  * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                                  * @returns {string} The default type url
                                  */
-                                ExtractiveContentSpec.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                                ChunkSpec.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                                     if (typeUrlPrefix === undefined) {
                                         typeUrlPrefix = "type.googleapis.com";
                                     }
-                                    return typeUrlPrefix + "/google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ExtractiveContentSpec";
+                                    return typeUrlPrefix + "/google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.ChunkSpec";
                                 };
     
-                                return ExtractiveContentSpec;
+                                return ChunkSpec;
+                            })();
+    
+                            /**
+                             * SearchResultMode enum.
+                             * @name google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SearchResultMode
+                             * @enum {number}
+                             * @property {number} SEARCH_RESULT_MODE_UNSPECIFIED=0 SEARCH_RESULT_MODE_UNSPECIFIED value
+                             * @property {number} DOCUMENTS=1 DOCUMENTS value
+                             * @property {number} CHUNKS=2 CHUNKS value
+                             */
+                            ContentSearchSpec.SearchResultMode = (function() {
+                                var valuesById = {}, values = Object.create(valuesById);
+                                values[valuesById[0] = "SEARCH_RESULT_MODE_UNSPECIFIED"] = 0;
+                                values[valuesById[1] = "DOCUMENTS"] = 1;
+                                values[valuesById[2] = "CHUNKS"] = 2;
+                                return values;
                             })();
     
                             return ContentSearchSpec;
                         })();
     
+                        SearchRequest.SearchAsYouTypeSpec = (function() {
+    
+                            /**
+                             * Properties of a SearchAsYouTypeSpec.
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest
+                             * @interface ISearchAsYouTypeSpec
+                             * @property {google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec.Condition|null} [condition] SearchAsYouTypeSpec condition
+                             */
+    
+                            /**
+                             * Constructs a new SearchAsYouTypeSpec.
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest
+                             * @classdesc Represents a SearchAsYouTypeSpec.
+                             * @implements ISearchAsYouTypeSpec
+                             * @constructor
+                             * @param {google.cloud.discoveryengine.v1.SearchRequest.ISearchAsYouTypeSpec=} [properties] Properties to set
+                             */
+                            function SearchAsYouTypeSpec(properties) {
+                                if (properties)
+                                    for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                        if (properties[keys[i]] != null)
+                                            this[keys[i]] = properties[keys[i]];
+                            }
+    
+                            /**
+                             * SearchAsYouTypeSpec condition.
+                             * @member {google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec.Condition} condition
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec
+                             * @instance
+                             */
+                            SearchAsYouTypeSpec.prototype.condition = 0;
+    
+                            /**
+                             * Creates a new SearchAsYouTypeSpec instance using the specified properties.
+                             * @function create
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.SearchRequest.ISearchAsYouTypeSpec=} [properties] Properties to set
+                             * @returns {google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec} SearchAsYouTypeSpec instance
+                             */
+                            SearchAsYouTypeSpec.create = function create(properties) {
+                                return new SearchAsYouTypeSpec(properties);
+                            };
+    
+                            /**
+                             * Encodes the specified SearchAsYouTypeSpec message. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec.verify|verify} messages.
+                             * @function encode
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.SearchRequest.ISearchAsYouTypeSpec} message SearchAsYouTypeSpec message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            SearchAsYouTypeSpec.encode = function encode(message, writer) {
+                                if (!writer)
+                                    writer = $Writer.create();
+                                if (message.condition != null && Object.hasOwnProperty.call(message, "condition"))
+                                    writer.uint32(/* id 1, wireType 0 =*/8).int32(message.condition);
+                                return writer;
+                            };
+    
+                            /**
+                             * Encodes the specified SearchAsYouTypeSpec message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec.verify|verify} messages.
+                             * @function encodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.SearchRequest.ISearchAsYouTypeSpec} message SearchAsYouTypeSpec message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            SearchAsYouTypeSpec.encodeDelimited = function encodeDelimited(message, writer) {
+                                return this.encode(message, writer).ldelim();
+                            };
+    
+                            /**
+                             * Decodes a SearchAsYouTypeSpec message from the specified reader or buffer.
+                             * @function decode
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @param {number} [length] Message length if known beforehand
+                             * @returns {google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec} SearchAsYouTypeSpec
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            SearchAsYouTypeSpec.decode = function decode(reader, length) {
+                                if (!(reader instanceof $Reader))
+                                    reader = $Reader.create(reader);
+                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec();
+                                while (reader.pos < end) {
+                                    var tag = reader.uint32();
+                                    switch (tag >>> 3) {
+                                    case 1: {
+                                            message.condition = reader.int32();
+                                            break;
+                                        }
+                                    default:
+                                        reader.skipType(tag & 7);
+                                        break;
+                                    }
+                                }
+                                return message;
+                            };
+    
+                            /**
+                             * Decodes a SearchAsYouTypeSpec message from the specified reader or buffer, length delimited.
+                             * @function decodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @returns {google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec} SearchAsYouTypeSpec
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            SearchAsYouTypeSpec.decodeDelimited = function decodeDelimited(reader) {
+                                if (!(reader instanceof $Reader))
+                                    reader = new $Reader(reader);
+                                return this.decode(reader, reader.uint32());
+                            };
+    
+                            /**
+                             * Verifies a SearchAsYouTypeSpec message.
+                             * @function verify
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec
+                             * @static
+                             * @param {Object.<string,*>} message Plain object to verify
+                             * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                             */
+                            SearchAsYouTypeSpec.verify = function verify(message) {
+                                if (typeof message !== "object" || message === null)
+                                    return "object expected";
+                                if (message.condition != null && message.hasOwnProperty("condition"))
+                                    switch (message.condition) {
+                                    default:
+                                        return "condition: enum value expected";
+                                    case 0:
+                                    case 1:
+                                    case 2:
+                                        break;
+                                    }
+                                return null;
+                            };
+    
+                            /**
+                             * Creates a SearchAsYouTypeSpec message from a plain object. Also converts values to their respective internal types.
+                             * @function fromObject
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec
+                             * @static
+                             * @param {Object.<string,*>} object Plain object
+                             * @returns {google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec} SearchAsYouTypeSpec
+                             */
+                            SearchAsYouTypeSpec.fromObject = function fromObject(object) {
+                                if (object instanceof $root.google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec)
+                                    return object;
+                                var message = new $root.google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec();
+                                switch (object.condition) {
+                                default:
+                                    if (typeof object.condition === "number") {
+                                        message.condition = object.condition;
+                                        break;
+                                    }
+                                    break;
+                                case "CONDITION_UNSPECIFIED":
+                                case 0:
+                                    message.condition = 0;
+                                    break;
+                                case "DISABLED":
+                                case 1:
+                                    message.condition = 1;
+                                    break;
+                                case "ENABLED":
+                                case 2:
+                                    message.condition = 2;
+                                    break;
+                                }
+                                return message;
+                            };
+    
+                            /**
+                             * Creates a plain object from a SearchAsYouTypeSpec message. Also converts values to other types if specified.
+                             * @function toObject
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec} message SearchAsYouTypeSpec
+                             * @param {$protobuf.IConversionOptions} [options] Conversion options
+                             * @returns {Object.<string,*>} Plain object
+                             */
+                            SearchAsYouTypeSpec.toObject = function toObject(message, options) {
+                                if (!options)
+                                    options = {};
+                                var object = {};
+                                if (options.defaults)
+                                    object.condition = options.enums === String ? "CONDITION_UNSPECIFIED" : 0;
+                                if (message.condition != null && message.hasOwnProperty("condition"))
+                                    object.condition = options.enums === String ? $root.google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec.Condition[message.condition] === undefined ? message.condition : $root.google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec.Condition[message.condition] : message.condition;
+                                return object;
+                            };
+    
+                            /**
+                             * Converts this SearchAsYouTypeSpec to JSON.
+                             * @function toJSON
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec
+                             * @instance
+                             * @returns {Object.<string,*>} JSON object
+                             */
+                            SearchAsYouTypeSpec.prototype.toJSON = function toJSON() {
+                                return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                            };
+    
+                            /**
+                             * Gets the default type url for SearchAsYouTypeSpec
+                             * @function getTypeUrl
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec
+                             * @static
+                             * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                             * @returns {string} The default type url
+                             */
+                            SearchAsYouTypeSpec.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                                if (typeUrlPrefix === undefined) {
+                                    typeUrlPrefix = "type.googleapis.com";
+                                }
+                                return typeUrlPrefix + "/google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec";
+                            };
+    
+                            /**
+                             * Condition enum.
+                             * @name google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec.Condition
+                             * @enum {number}
+                             * @property {number} CONDITION_UNSPECIFIED=0 CONDITION_UNSPECIFIED value
+                             * @property {number} DISABLED=1 DISABLED value
+                             * @property {number} ENABLED=2 ENABLED value
+                             */
+                            SearchAsYouTypeSpec.Condition = (function() {
+                                var valuesById = {}, values = Object.create(valuesById);
+                                values[valuesById[0] = "CONDITION_UNSPECIFIED"] = 0;
+                                values[valuesById[1] = "DISABLED"] = 1;
+                                values[valuesById[2] = "ENABLED"] = 2;
+                                return values;
+                            })();
+    
+                            return SearchAsYouTypeSpec;
+                        })();
+    
+                        SearchRequest.SessionSpec = (function() {
+    
+                            /**
+                             * Properties of a SessionSpec.
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest
+                             * @interface ISessionSpec
+                             * @property {string|null} [queryId] SessionSpec queryId
+                             * @property {number|null} [searchResultPersistenceCount] SessionSpec searchResultPersistenceCount
+                             */
+    
+                            /**
+                             * Constructs a new SessionSpec.
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest
+                             * @classdesc Represents a SessionSpec.
+                             * @implements ISessionSpec
+                             * @constructor
+                             * @param {google.cloud.discoveryengine.v1.SearchRequest.ISessionSpec=} [properties] Properties to set
+                             */
+                            function SessionSpec(properties) {
+                                if (properties)
+                                    for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                        if (properties[keys[i]] != null)
+                                            this[keys[i]] = properties[keys[i]];
+                            }
+    
+                            /**
+                             * SessionSpec queryId.
+                             * @member {string} queryId
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SessionSpec
+                             * @instance
+                             */
+                            SessionSpec.prototype.queryId = "";
+    
+                            /**
+                             * SessionSpec searchResultPersistenceCount.
+                             * @member {number|null|undefined} searchResultPersistenceCount
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SessionSpec
+                             * @instance
+                             */
+                            SessionSpec.prototype.searchResultPersistenceCount = null;
+    
+                            // OneOf field names bound to virtual getters and setters
+                            var $oneOfFields;
+    
+                            /**
+                             * SessionSpec _searchResultPersistenceCount.
+                             * @member {"searchResultPersistenceCount"|undefined} _searchResultPersistenceCount
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SessionSpec
+                             * @instance
+                             */
+                            Object.defineProperty(SessionSpec.prototype, "_searchResultPersistenceCount", {
+                                get: $util.oneOfGetter($oneOfFields = ["searchResultPersistenceCount"]),
+                                set: $util.oneOfSetter($oneOfFields)
+                            });
+    
+                            /**
+                             * Creates a new SessionSpec instance using the specified properties.
+                             * @function create
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SessionSpec
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.SearchRequest.ISessionSpec=} [properties] Properties to set
+                             * @returns {google.cloud.discoveryengine.v1.SearchRequest.SessionSpec} SessionSpec instance
+                             */
+                            SessionSpec.create = function create(properties) {
+                                return new SessionSpec(properties);
+                            };
+    
+                            /**
+                             * Encodes the specified SessionSpec message. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchRequest.SessionSpec.verify|verify} messages.
+                             * @function encode
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SessionSpec
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.SearchRequest.ISessionSpec} message SessionSpec message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            SessionSpec.encode = function encode(message, writer) {
+                                if (!writer)
+                                    writer = $Writer.create();
+                                if (message.queryId != null && Object.hasOwnProperty.call(message, "queryId"))
+                                    writer.uint32(/* id 1, wireType 2 =*/10).string(message.queryId);
+                                if (message.searchResultPersistenceCount != null && Object.hasOwnProperty.call(message, "searchResultPersistenceCount"))
+                                    writer.uint32(/* id 2, wireType 0 =*/16).int32(message.searchResultPersistenceCount);
+                                return writer;
+                            };
+    
+                            /**
+                             * Encodes the specified SessionSpec message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchRequest.SessionSpec.verify|verify} messages.
+                             * @function encodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SessionSpec
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.SearchRequest.ISessionSpec} message SessionSpec message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            SessionSpec.encodeDelimited = function encodeDelimited(message, writer) {
+                                return this.encode(message, writer).ldelim();
+                            };
+    
+                            /**
+                             * Decodes a SessionSpec message from the specified reader or buffer.
+                             * @function decode
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SessionSpec
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @param {number} [length] Message length if known beforehand
+                             * @returns {google.cloud.discoveryengine.v1.SearchRequest.SessionSpec} SessionSpec
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            SessionSpec.decode = function decode(reader, length) {
+                                if (!(reader instanceof $Reader))
+                                    reader = $Reader.create(reader);
+                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.SearchRequest.SessionSpec();
+                                while (reader.pos < end) {
+                                    var tag = reader.uint32();
+                                    switch (tag >>> 3) {
+                                    case 1: {
+                                            message.queryId = reader.string();
+                                            break;
+                                        }
+                                    case 2: {
+                                            message.searchResultPersistenceCount = reader.int32();
+                                            break;
+                                        }
+                                    default:
+                                        reader.skipType(tag & 7);
+                                        break;
+                                    }
+                                }
+                                return message;
+                            };
+    
+                            /**
+                             * Decodes a SessionSpec message from the specified reader or buffer, length delimited.
+                             * @function decodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SessionSpec
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @returns {google.cloud.discoveryengine.v1.SearchRequest.SessionSpec} SessionSpec
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            SessionSpec.decodeDelimited = function decodeDelimited(reader) {
+                                if (!(reader instanceof $Reader))
+                                    reader = new $Reader(reader);
+                                return this.decode(reader, reader.uint32());
+                            };
+    
+                            /**
+                             * Verifies a SessionSpec message.
+                             * @function verify
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SessionSpec
+                             * @static
+                             * @param {Object.<string,*>} message Plain object to verify
+                             * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                             */
+                            SessionSpec.verify = function verify(message) {
+                                if (typeof message !== "object" || message === null)
+                                    return "object expected";
+                                var properties = {};
+                                if (message.queryId != null && message.hasOwnProperty("queryId"))
+                                    if (!$util.isString(message.queryId))
+                                        return "queryId: string expected";
+                                if (message.searchResultPersistenceCount != null && message.hasOwnProperty("searchResultPersistenceCount")) {
+                                    properties._searchResultPersistenceCount = 1;
+                                    if (!$util.isInteger(message.searchResultPersistenceCount))
+                                        return "searchResultPersistenceCount: integer expected";
+                                }
+                                return null;
+                            };
+    
+                            /**
+                             * Creates a SessionSpec message from a plain object. Also converts values to their respective internal types.
+                             * @function fromObject
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SessionSpec
+                             * @static
+                             * @param {Object.<string,*>} object Plain object
+                             * @returns {google.cloud.discoveryengine.v1.SearchRequest.SessionSpec} SessionSpec
+                             */
+                            SessionSpec.fromObject = function fromObject(object) {
+                                if (object instanceof $root.google.cloud.discoveryengine.v1.SearchRequest.SessionSpec)
+                                    return object;
+                                var message = new $root.google.cloud.discoveryengine.v1.SearchRequest.SessionSpec();
+                                if (object.queryId != null)
+                                    message.queryId = String(object.queryId);
+                                if (object.searchResultPersistenceCount != null)
+                                    message.searchResultPersistenceCount = object.searchResultPersistenceCount | 0;
+                                return message;
+                            };
+    
+                            /**
+                             * Creates a plain object from a SessionSpec message. Also converts values to other types if specified.
+                             * @function toObject
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SessionSpec
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.SearchRequest.SessionSpec} message SessionSpec
+                             * @param {$protobuf.IConversionOptions} [options] Conversion options
+                             * @returns {Object.<string,*>} Plain object
+                             */
+                            SessionSpec.toObject = function toObject(message, options) {
+                                if (!options)
+                                    options = {};
+                                var object = {};
+                                if (options.defaults)
+                                    object.queryId = "";
+                                if (message.queryId != null && message.hasOwnProperty("queryId"))
+                                    object.queryId = message.queryId;
+                                if (message.searchResultPersistenceCount != null && message.hasOwnProperty("searchResultPersistenceCount")) {
+                                    object.searchResultPersistenceCount = message.searchResultPersistenceCount;
+                                    if (options.oneofs)
+                                        object._searchResultPersistenceCount = "searchResultPersistenceCount";
+                                }
+                                return object;
+                            };
+    
+                            /**
+                             * Converts this SessionSpec to JSON.
+                             * @function toJSON
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SessionSpec
+                             * @instance
+                             * @returns {Object.<string,*>} JSON object
+                             */
+                            SessionSpec.prototype.toJSON = function toJSON() {
+                                return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                            };
+    
+                            /**
+                             * Gets the default type url for SessionSpec
+                             * @function getTypeUrl
+                             * @memberof google.cloud.discoveryengine.v1.SearchRequest.SessionSpec
+                             * @static
+                             * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                             * @returns {string} The default type url
+                             */
+                            SessionSpec.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                                if (typeUrlPrefix === undefined) {
+                                    typeUrlPrefix = "type.googleapis.com";
+                                }
+                                return typeUrlPrefix + "/google.cloud.discoveryengine.v1.SearchRequest.SessionSpec";
+                            };
+    
+                            return SessionSpec;
+                        })();
+    
                         return SearchRequest;
                     })();
     
@@ -28957,6 +33695,7 @@
                          * @property {string|null} [correctedQuery] SearchResponse correctedQuery
                          * @property {google.cloud.discoveryengine.v1.SearchResponse.ISummary|null} [summary] SearchResponse summary
                          * @property {google.cloud.discoveryengine.v1.SearchResponse.IQueryExpansionInfo|null} [queryExpansionInfo] SearchResponse queryExpansionInfo
+                         * @property {google.cloud.discoveryengine.v1.SearchResponse.ISessionInfo|null} [sessionInfo] SearchResponse sessionInfo
                          */
     
                         /**
@@ -29048,6 +33787,14 @@
                          */
                         SearchResponse.prototype.queryExpansionInfo = null;
     
+                        /**
+                         * SearchResponse sessionInfo.
+                         * @member {google.cloud.discoveryengine.v1.SearchResponse.ISessionInfo|null|undefined} sessionInfo
+                         * @memberof google.cloud.discoveryengine.v1.SearchResponse
+                         * @instance
+                         */
+                        SearchResponse.prototype.sessionInfo = null;
+    
                         /**
                          * Creates a new SearchResponse instance using the specified properties.
                          * @function create
@@ -29092,6 +33839,8 @@
                                 writer.uint32(/* id 12, wireType 2 =*/98).string(message.redirectUri);
                             if (message.queryExpansionInfo != null && Object.hasOwnProperty.call(message, "queryExpansionInfo"))
                                 $root.google.cloud.discoveryengine.v1.SearchResponse.QueryExpansionInfo.encode(message.queryExpansionInfo, writer.uint32(/* id 14, wireType 2 =*/114).fork()).ldelim();
+                            if (message.sessionInfo != null && Object.hasOwnProperty.call(message, "sessionInfo"))
+                                $root.google.cloud.discoveryengine.v1.SearchResponse.SessionInfo.encode(message.sessionInfo, writer.uint32(/* id 19, wireType 2 =*/154).fork()).ldelim();
                             return writer;
                         };
     
@@ -29166,6 +33915,10 @@
                                         message.queryExpansionInfo = $root.google.cloud.discoveryengine.v1.SearchResponse.QueryExpansionInfo.decode(reader, reader.uint32());
                                         break;
                                     }
+                                case 19: {
+                                        message.sessionInfo = $root.google.cloud.discoveryengine.v1.SearchResponse.SessionInfo.decode(reader, reader.uint32());
+                                        break;
+                                    }
                                 default:
                                     reader.skipType(tag & 7);
                                     break;
@@ -29244,6 +33997,11 @@
                                 if (error)
                                     return "queryExpansionInfo." + error;
                             }
+                            if (message.sessionInfo != null && message.hasOwnProperty("sessionInfo")) {
+                                var error = $root.google.cloud.discoveryengine.v1.SearchResponse.SessionInfo.verify(message.sessionInfo);
+                                if (error)
+                                    return "sessionInfo." + error;
+                            }
                             return null;
                         };
     
@@ -29299,6 +34057,11 @@
                                     throw TypeError(".google.cloud.discoveryengine.v1.SearchResponse.queryExpansionInfo: object expected");
                                 message.queryExpansionInfo = $root.google.cloud.discoveryengine.v1.SearchResponse.QueryExpansionInfo.fromObject(object.queryExpansionInfo);
                             }
+                            if (object.sessionInfo != null) {
+                                if (typeof object.sessionInfo !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.SearchResponse.sessionInfo: object expected");
+                                message.sessionInfo = $root.google.cloud.discoveryengine.v1.SearchResponse.SessionInfo.fromObject(object.sessionInfo);
+                            }
                             return message;
                         };
     
@@ -29327,6 +34090,7 @@
                                 object.summary = null;
                                 object.redirectUri = "";
                                 object.queryExpansionInfo = null;
+                                object.sessionInfo = null;
                             }
                             if (message.results && message.results.length) {
                                 object.results = [];
@@ -29352,6 +34116,8 @@
                                 object.redirectUri = message.redirectUri;
                             if (message.queryExpansionInfo != null && message.hasOwnProperty("queryExpansionInfo"))
                                 object.queryExpansionInfo = $root.google.cloud.discoveryengine.v1.SearchResponse.QueryExpansionInfo.toObject(message.queryExpansionInfo, options);
+                            if (message.sessionInfo != null && message.hasOwnProperty("sessionInfo"))
+                                object.sessionInfo = $root.google.cloud.discoveryengine.v1.SearchResponse.SessionInfo.toObject(message.sessionInfo, options);
                             return object;
                         };
     
@@ -29389,6 +34155,7 @@
                              * @interface ISearchResult
                              * @property {string|null} [id] SearchResult id
                              * @property {google.cloud.discoveryengine.v1.IDocument|null} [document] SearchResult document
+                             * @property {google.cloud.discoveryengine.v1.IChunk|null} [chunk] SearchResult chunk
                              */
     
                             /**
@@ -29422,6 +34189,14 @@
                              */
                             SearchResult.prototype.document = null;
     
+                            /**
+                             * SearchResult chunk.
+                             * @member {google.cloud.discoveryengine.v1.IChunk|null|undefined} chunk
+                             * @memberof google.cloud.discoveryengine.v1.SearchResponse.SearchResult
+                             * @instance
+                             */
+                            SearchResult.prototype.chunk = null;
+    
                             /**
                              * Creates a new SearchResult instance using the specified properties.
                              * @function create
@@ -29450,6 +34225,8 @@
                                     writer.uint32(/* id 1, wireType 2 =*/10).string(message.id);
                                 if (message.document != null && Object.hasOwnProperty.call(message, "document"))
                                     $root.google.cloud.discoveryengine.v1.Document.encode(message.document, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                                if (message.chunk != null && Object.hasOwnProperty.call(message, "chunk"))
+                                    $root.google.cloud.discoveryengine.v1.Chunk.encode(message.chunk, writer.uint32(/* id 18, wireType 2 =*/146).fork()).ldelim();
                                 return writer;
                             };
     
@@ -29492,6 +34269,10 @@
                                             message.document = $root.google.cloud.discoveryengine.v1.Document.decode(reader, reader.uint32());
                                             break;
                                         }
+                                    case 18: {
+                                            message.chunk = $root.google.cloud.discoveryengine.v1.Chunk.decode(reader, reader.uint32());
+                                            break;
+                                        }
                                     default:
                                         reader.skipType(tag & 7);
                                         break;
@@ -29535,6 +34316,11 @@
                                     if (error)
                                         return "document." + error;
                                 }
+                                if (message.chunk != null && message.hasOwnProperty("chunk")) {
+                                    var error = $root.google.cloud.discoveryengine.v1.Chunk.verify(message.chunk);
+                                    if (error)
+                                        return "chunk." + error;
+                                }
                                 return null;
                             };
     
@@ -29557,6 +34343,11 @@
                                         throw TypeError(".google.cloud.discoveryengine.v1.SearchResponse.SearchResult.document: object expected");
                                     message.document = $root.google.cloud.discoveryengine.v1.Document.fromObject(object.document);
                                 }
+                                if (object.chunk != null) {
+                                    if (typeof object.chunk !== "object")
+                                        throw TypeError(".google.cloud.discoveryengine.v1.SearchResponse.SearchResult.chunk: object expected");
+                                    message.chunk = $root.google.cloud.discoveryengine.v1.Chunk.fromObject(object.chunk);
+                                }
                                 return message;
                             };
     
@@ -29576,11 +34367,14 @@
                                 if (options.defaults) {
                                     object.id = "";
                                     object.document = null;
+                                    object.chunk = null;
                                 }
                                 if (message.id != null && message.hasOwnProperty("id"))
                                     object.id = message.id;
                                 if (message.document != null && message.hasOwnProperty("document"))
                                     object.document = $root.google.cloud.discoveryengine.v1.Document.toObject(message.document, options);
+                                if (message.chunk != null && message.hasOwnProperty("chunk"))
+                                    object.chunk = $root.google.cloud.discoveryengine.v1.Chunk.toObject(message.chunk, options);
                                 return object;
                             };
     
@@ -32596,6 +37390,233 @@
                             return QueryExpansionInfo;
                         })();
     
+                        SearchResponse.SessionInfo = (function() {
+    
+                            /**
+                             * Properties of a SessionInfo.
+                             * @memberof google.cloud.discoveryengine.v1.SearchResponse
+                             * @interface ISessionInfo
+                             * @property {string|null} [name] SessionInfo name
+                             * @property {string|null} [queryId] SessionInfo queryId
+                             */
+    
+                            /**
+                             * Constructs a new SessionInfo.
+                             * @memberof google.cloud.discoveryengine.v1.SearchResponse
+                             * @classdesc Represents a SessionInfo.
+                             * @implements ISessionInfo
+                             * @constructor
+                             * @param {google.cloud.discoveryengine.v1.SearchResponse.ISessionInfo=} [properties] Properties to set
+                             */
+                            function SessionInfo(properties) {
+                                if (properties)
+                                    for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                        if (properties[keys[i]] != null)
+                                            this[keys[i]] = properties[keys[i]];
+                            }
+    
+                            /**
+                             * SessionInfo name.
+                             * @member {string} name
+                             * @memberof google.cloud.discoveryengine.v1.SearchResponse.SessionInfo
+                             * @instance
+                             */
+                            SessionInfo.prototype.name = "";
+    
+                            /**
+                             * SessionInfo queryId.
+                             * @member {string} queryId
+                             * @memberof google.cloud.discoveryengine.v1.SearchResponse.SessionInfo
+                             * @instance
+                             */
+                            SessionInfo.prototype.queryId = "";
+    
+                            /**
+                             * Creates a new SessionInfo instance using the specified properties.
+                             * @function create
+                             * @memberof google.cloud.discoveryengine.v1.SearchResponse.SessionInfo
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.SearchResponse.ISessionInfo=} [properties] Properties to set
+                             * @returns {google.cloud.discoveryengine.v1.SearchResponse.SessionInfo} SessionInfo instance
+                             */
+                            SessionInfo.create = function create(properties) {
+                                return new SessionInfo(properties);
+                            };
+    
+                            /**
+                             * Encodes the specified SessionInfo message. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchResponse.SessionInfo.verify|verify} messages.
+                             * @function encode
+                             * @memberof google.cloud.discoveryengine.v1.SearchResponse.SessionInfo
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.SearchResponse.ISessionInfo} message SessionInfo message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            SessionInfo.encode = function encode(message, writer) {
+                                if (!writer)
+                                    writer = $Writer.create();
+                                if (message.name != null && Object.hasOwnProperty.call(message, "name"))
+                                    writer.uint32(/* id 1, wireType 2 =*/10).string(message.name);
+                                if (message.queryId != null && Object.hasOwnProperty.call(message, "queryId"))
+                                    writer.uint32(/* id 2, wireType 2 =*/18).string(message.queryId);
+                                return writer;
+                            };
+    
+                            /**
+                             * Encodes the specified SessionInfo message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.SearchResponse.SessionInfo.verify|verify} messages.
+                             * @function encodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.SearchResponse.SessionInfo
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.SearchResponse.ISessionInfo} message SessionInfo message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            SessionInfo.encodeDelimited = function encodeDelimited(message, writer) {
+                                return this.encode(message, writer).ldelim();
+                            };
+    
+                            /**
+                             * Decodes a SessionInfo message from the specified reader or buffer.
+                             * @function decode
+                             * @memberof google.cloud.discoveryengine.v1.SearchResponse.SessionInfo
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @param {number} [length] Message length if known beforehand
+                             * @returns {google.cloud.discoveryengine.v1.SearchResponse.SessionInfo} SessionInfo
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            SessionInfo.decode = function decode(reader, length) {
+                                if (!(reader instanceof $Reader))
+                                    reader = $Reader.create(reader);
+                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.SearchResponse.SessionInfo();
+                                while (reader.pos < end) {
+                                    var tag = reader.uint32();
+                                    switch (tag >>> 3) {
+                                    case 1: {
+                                            message.name = reader.string();
+                                            break;
+                                        }
+                                    case 2: {
+                                            message.queryId = reader.string();
+                                            break;
+                                        }
+                                    default:
+                                        reader.skipType(tag & 7);
+                                        break;
+                                    }
+                                }
+                                return message;
+                            };
+    
+                            /**
+                             * Decodes a SessionInfo message from the specified reader or buffer, length delimited.
+                             * @function decodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.SearchResponse.SessionInfo
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @returns {google.cloud.discoveryengine.v1.SearchResponse.SessionInfo} SessionInfo
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            SessionInfo.decodeDelimited = function decodeDelimited(reader) {
+                                if (!(reader instanceof $Reader))
+                                    reader = new $Reader(reader);
+                                return this.decode(reader, reader.uint32());
+                            };
+    
+                            /**
+                             * Verifies a SessionInfo message.
+                             * @function verify
+                             * @memberof google.cloud.discoveryengine.v1.SearchResponse.SessionInfo
+                             * @static
+                             * @param {Object.<string,*>} message Plain object to verify
+                             * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                             */
+                            SessionInfo.verify = function verify(message) {
+                                if (typeof message !== "object" || message === null)
+                                    return "object expected";
+                                if (message.name != null && message.hasOwnProperty("name"))
+                                    if (!$util.isString(message.name))
+                                        return "name: string expected";
+                                if (message.queryId != null && message.hasOwnProperty("queryId"))
+                                    if (!$util.isString(message.queryId))
+                                        return "queryId: string expected";
+                                return null;
+                            };
+    
+                            /**
+                             * Creates a SessionInfo message from a plain object. Also converts values to their respective internal types.
+                             * @function fromObject
+                             * @memberof google.cloud.discoveryengine.v1.SearchResponse.SessionInfo
+                             * @static
+                             * @param {Object.<string,*>} object Plain object
+                             * @returns {google.cloud.discoveryengine.v1.SearchResponse.SessionInfo} SessionInfo
+                             */
+                            SessionInfo.fromObject = function fromObject(object) {
+                                if (object instanceof $root.google.cloud.discoveryengine.v1.SearchResponse.SessionInfo)
+                                    return object;
+                                var message = new $root.google.cloud.discoveryengine.v1.SearchResponse.SessionInfo();
+                                if (object.name != null)
+                                    message.name = String(object.name);
+                                if (object.queryId != null)
+                                    message.queryId = String(object.queryId);
+                                return message;
+                            };
+    
+                            /**
+                             * Creates a plain object from a SessionInfo message. Also converts values to other types if specified.
+                             * @function toObject
+                             * @memberof google.cloud.discoveryengine.v1.SearchResponse.SessionInfo
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.SearchResponse.SessionInfo} message SessionInfo
+                             * @param {$protobuf.IConversionOptions} [options] Conversion options
+                             * @returns {Object.<string,*>} Plain object
+                             */
+                            SessionInfo.toObject = function toObject(message, options) {
+                                if (!options)
+                                    options = {};
+                                var object = {};
+                                if (options.defaults) {
+                                    object.name = "";
+                                    object.queryId = "";
+                                }
+                                if (message.name != null && message.hasOwnProperty("name"))
+                                    object.name = message.name;
+                                if (message.queryId != null && message.hasOwnProperty("queryId"))
+                                    object.queryId = message.queryId;
+                                return object;
+                            };
+    
+                            /**
+                             * Converts this SessionInfo to JSON.
+                             * @function toJSON
+                             * @memberof google.cloud.discoveryengine.v1.SearchResponse.SessionInfo
+                             * @instance
+                             * @returns {Object.<string,*>} JSON object
+                             */
+                            SessionInfo.prototype.toJSON = function toJSON() {
+                                return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                            };
+    
+                            /**
+                             * Gets the default type url for SessionInfo
+                             * @function getTypeUrl
+                             * @memberof google.cloud.discoveryengine.v1.SearchResponse.SessionInfo
+                             * @static
+                             * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                             * @returns {string} The default type url
+                             */
+                            SessionInfo.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                                if (typeUrlPrefix === undefined) {
+                                    typeUrlPrefix = "type.googleapis.com";
+                                }
+                                return typeUrlPrefix + "/google.cloud.discoveryengine.v1.SearchResponse.SessionInfo";
+                            };
+    
+                            return SessionInfo;
+                        })();
+    
                         return SearchResponse;
                     })();
     
@@ -35224,6 +40245,7 @@
                          * @property {google.cloud.discoveryengine.v1.AnswerQueryRequest.IQueryUnderstandingSpec|null} [queryUnderstandingSpec] AnswerQueryRequest queryUnderstandingSpec
                          * @property {boolean|null} [asynchronousMode] AnswerQueryRequest asynchronousMode
                          * @property {string|null} [userPseudoId] AnswerQueryRequest userPseudoId
+                         * @property {Object.<string,string>|null} [userLabels] AnswerQueryRequest userLabels
                          */
     
                         /**
@@ -35235,6 +40257,7 @@
                          * @param {google.cloud.discoveryengine.v1.IAnswerQueryRequest=} [properties] Properties to set
                          */
                         function AnswerQueryRequest(properties) {
+                            this.userLabels = {};
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -35321,6 +40344,14 @@
                          */
                         AnswerQueryRequest.prototype.userPseudoId = "";
     
+                        /**
+                         * AnswerQueryRequest userLabels.
+                         * @member {Object.<string,string>} userLabels
+                         * @memberof google.cloud.discoveryengine.v1.AnswerQueryRequest
+                         * @instance
+                         */
+                        AnswerQueryRequest.prototype.userLabels = $util.emptyObject;
+    
                         /**
                          * Creates a new AnswerQueryRequest instance using the specified properties.
                          * @function create
@@ -35365,6 +40396,9 @@
                                 writer.uint32(/* id 10, wireType 0 =*/80).bool(message.asynchronousMode);
                             if (message.userPseudoId != null && Object.hasOwnProperty.call(message, "userPseudoId"))
                                 writer.uint32(/* id 12, wireType 2 =*/98).string(message.userPseudoId);
+                            if (message.userLabels != null && Object.hasOwnProperty.call(message, "userLabels"))
+                                for (var keys = Object.keys(message.userLabels), i = 0; i < keys.length; ++i)
+                                    writer.uint32(/* id 13, wireType 2 =*/106).fork().uint32(/* id 1, wireType 2 =*/10).string(keys[i]).uint32(/* id 2, wireType 2 =*/18).string(message.userLabels[keys[i]]).ldelim();
                             return writer;
                         };
     
@@ -35395,7 +40429,7 @@
                         AnswerQueryRequest.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.AnswerQueryRequest();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.AnswerQueryRequest(), key, value;
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
@@ -35439,6 +40473,29 @@
                                         message.userPseudoId = reader.string();
                                         break;
                                     }
+                                case 13: {
+                                        if (message.userLabels === $util.emptyObject)
+                                            message.userLabels = {};
+                                        var end2 = reader.uint32() + reader.pos;
+                                        key = "";
+                                        value = "";
+                                        while (reader.pos < end2) {
+                                            var tag2 = reader.uint32();
+                                            switch (tag2 >>> 3) {
+                                            case 1:
+                                                key = reader.string();
+                                                break;
+                                            case 2:
+                                                value = reader.string();
+                                                break;
+                                            default:
+                                                reader.skipType(tag2 & 7);
+                                                break;
+                                            }
+                                        }
+                                        message.userLabels[key] = value;
+                                        break;
+                                    }
                                 default:
                                     reader.skipType(tag & 7);
                                     break;
@@ -35516,6 +40573,14 @@
                             if (message.userPseudoId != null && message.hasOwnProperty("userPseudoId"))
                                 if (!$util.isString(message.userPseudoId))
                                     return "userPseudoId: string expected";
+                            if (message.userLabels != null && message.hasOwnProperty("userLabels")) {
+                                if (!$util.isObject(message.userLabels))
+                                    return "userLabels: object expected";
+                                var key = Object.keys(message.userLabels);
+                                for (var i = 0; i < key.length; ++i)
+                                    if (!$util.isString(message.userLabels[key[i]]))
+                                        return "userLabels: string{k:string} expected";
+                            }
                             return null;
                         };
     
@@ -35569,6 +40634,13 @@
                                 message.asynchronousMode = Boolean(object.asynchronousMode);
                             if (object.userPseudoId != null)
                                 message.userPseudoId = String(object.userPseudoId);
+                            if (object.userLabels) {
+                                if (typeof object.userLabels !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.AnswerQueryRequest.userLabels: object expected");
+                                message.userLabels = {};
+                                for (var keys = Object.keys(object.userLabels), i = 0; i < keys.length; ++i)
+                                    message.userLabels[keys[i]] = String(object.userLabels[keys[i]]);
+                            }
                             return message;
                         };
     
@@ -35585,6 +40657,8 @@
                             if (!options)
                                 options = {};
                             var object = {};
+                            if (options.objects || options.defaults)
+                                object.userLabels = {};
                             if (options.defaults) {
                                 object.servingConfig = "";
                                 object.query = null;
@@ -35617,6 +40691,12 @@
                                 object.asynchronousMode = message.asynchronousMode;
                             if (message.userPseudoId != null && message.hasOwnProperty("userPseudoId"))
                                 object.userPseudoId = message.userPseudoId;
+                            var keys2;
+                            if (message.userLabels && (keys2 = Object.keys(message.userLabels)).length) {
+                                object.userLabels = {};
+                                for (var j = 0; j < keys2.length; ++j)
+                                    object.userLabels[keys2[j]] = message.userLabels[keys2[j]];
+                            }
                             return object;
                         };
     
@@ -37098,6 +42178,7 @@
                                  * @property {string|null} [filter] SearchParams filter
                                  * @property {google.cloud.discoveryengine.v1.SearchRequest.IBoostSpec|null} [boostSpec] SearchParams boostSpec
                                  * @property {string|null} [orderBy] SearchParams orderBy
+                                 * @property {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SearchResultMode|null} [searchResultMode] SearchParams searchResultMode
                                  * @property {Array.<google.cloud.discoveryengine.v1.SearchRequest.IDataStoreSpec>|null} [dataStoreSpecs] SearchParams dataStoreSpecs
                                  */
     
@@ -37149,6 +42230,14 @@
                                  */
                                 SearchParams.prototype.orderBy = "";
     
+                                /**
+                                 * SearchParams searchResultMode.
+                                 * @member {google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SearchResultMode} searchResultMode
+                                 * @memberof google.cloud.discoveryengine.v1.AnswerQueryRequest.SearchSpec.SearchParams
+                                 * @instance
+                                 */
+                                SearchParams.prototype.searchResultMode = 0;
+    
                                 /**
                                  * SearchParams dataStoreSpecs.
                                  * @member {Array.<google.cloud.discoveryengine.v1.SearchRequest.IDataStoreSpec>} dataStoreSpecs
@@ -37189,6 +42278,8 @@
                                         $root.google.cloud.discoveryengine.v1.SearchRequest.BoostSpec.encode(message.boostSpec, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
                                     if (message.orderBy != null && Object.hasOwnProperty.call(message, "orderBy"))
                                         writer.uint32(/* id 4, wireType 2 =*/34).string(message.orderBy);
+                                    if (message.searchResultMode != null && Object.hasOwnProperty.call(message, "searchResultMode"))
+                                        writer.uint32(/* id 5, wireType 0 =*/40).int32(message.searchResultMode);
                                     if (message.dataStoreSpecs != null && message.dataStoreSpecs.length)
                                         for (var i = 0; i < message.dataStoreSpecs.length; ++i)
                                             $root.google.cloud.discoveryengine.v1.SearchRequest.DataStoreSpec.encode(message.dataStoreSpecs[i], writer.uint32(/* id 7, wireType 2 =*/58).fork()).ldelim();
@@ -37242,6 +42333,10 @@
                                                 message.orderBy = reader.string();
                                                 break;
                                             }
+                                        case 5: {
+                                                message.searchResultMode = reader.int32();
+                                                break;
+                                            }
                                         case 7: {
                                                 if (!(message.dataStoreSpecs && message.dataStoreSpecs.length))
                                                     message.dataStoreSpecs = [];
@@ -37297,6 +42392,15 @@
                                     if (message.orderBy != null && message.hasOwnProperty("orderBy"))
                                         if (!$util.isString(message.orderBy))
                                             return "orderBy: string expected";
+                                    if (message.searchResultMode != null && message.hasOwnProperty("searchResultMode"))
+                                        switch (message.searchResultMode) {
+                                        default:
+                                            return "searchResultMode: enum value expected";
+                                        case 0:
+                                        case 1:
+                                        case 2:
+                                            break;
+                                        }
                                     if (message.dataStoreSpecs != null && message.hasOwnProperty("dataStoreSpecs")) {
                                         if (!Array.isArray(message.dataStoreSpecs))
                                             return "dataStoreSpecs: array expected";
@@ -37332,6 +42436,26 @@
                                     }
                                     if (object.orderBy != null)
                                         message.orderBy = String(object.orderBy);
+                                    switch (object.searchResultMode) {
+                                    default:
+                                        if (typeof object.searchResultMode === "number") {
+                                            message.searchResultMode = object.searchResultMode;
+                                            break;
+                                        }
+                                        break;
+                                    case "SEARCH_RESULT_MODE_UNSPECIFIED":
+                                    case 0:
+                                        message.searchResultMode = 0;
+                                        break;
+                                    case "DOCUMENTS":
+                                    case 1:
+                                        message.searchResultMode = 1;
+                                        break;
+                                    case "CHUNKS":
+                                    case 2:
+                                        message.searchResultMode = 2;
+                                        break;
+                                    }
                                     if (object.dataStoreSpecs) {
                                         if (!Array.isArray(object.dataStoreSpecs))
                                             throw TypeError(".google.cloud.discoveryengine.v1.AnswerQueryRequest.SearchSpec.SearchParams.dataStoreSpecs: array expected");
@@ -37365,6 +42489,7 @@
                                         object.filter = "";
                                         object.boostSpec = null;
                                         object.orderBy = "";
+                                        object.searchResultMode = options.enums === String ? "SEARCH_RESULT_MODE_UNSPECIFIED" : 0;
                                     }
                                     if (message.maxReturnResults != null && message.hasOwnProperty("maxReturnResults"))
                                         object.maxReturnResults = message.maxReturnResults;
@@ -37374,6 +42499,8 @@
                                         object.boostSpec = $root.google.cloud.discoveryengine.v1.SearchRequest.BoostSpec.toObject(message.boostSpec, options);
                                     if (message.orderBy != null && message.hasOwnProperty("orderBy"))
                                         object.orderBy = message.orderBy;
+                                    if (message.searchResultMode != null && message.hasOwnProperty("searchResultMode"))
+                                        object.searchResultMode = options.enums === String ? $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SearchResultMode[message.searchResultMode] === undefined ? message.searchResultMode : $root.google.cloud.discoveryengine.v1.SearchRequest.ContentSearchSpec.SearchResultMode[message.searchResultMode] : message.searchResultMode;
                                     if (message.dataStoreSpecs && message.dataStoreSpecs.length) {
                                         object.dataStoreSpecs = [];
                                         for (var j = 0; j < message.dataStoreSpecs.length; ++j)
@@ -39700,6 +44827,7 @@
                                  * @memberof google.cloud.discoveryengine.v1.AnswerQueryRequest.QueryUnderstandingSpec
                                  * @interface IQueryRephraserSpec
                                  * @property {boolean|null} [disable] QueryRephraserSpec disable
+                                 * @property {number|null} [maxRephraseSteps] QueryRephraserSpec maxRephraseSteps
                                  */
     
                                 /**
@@ -39725,6 +44853,14 @@
                                  */
                                 QueryRephraserSpec.prototype.disable = false;
     
+                                /**
+                                 * QueryRephraserSpec maxRephraseSteps.
+                                 * @member {number} maxRephraseSteps
+                                 * @memberof google.cloud.discoveryengine.v1.AnswerQueryRequest.QueryUnderstandingSpec.QueryRephraserSpec
+                                 * @instance
+                                 */
+                                QueryRephraserSpec.prototype.maxRephraseSteps = 0;
+    
                                 /**
                                  * Creates a new QueryRephraserSpec instance using the specified properties.
                                  * @function create
@@ -39751,6 +44887,8 @@
                                         writer = $Writer.create();
                                     if (message.disable != null && Object.hasOwnProperty.call(message, "disable"))
                                         writer.uint32(/* id 1, wireType 0 =*/8).bool(message.disable);
+                                    if (message.maxRephraseSteps != null && Object.hasOwnProperty.call(message, "maxRephraseSteps"))
+                                        writer.uint32(/* id 2, wireType 0 =*/16).int32(message.maxRephraseSteps);
                                     return writer;
                                 };
     
@@ -39789,6 +44927,10 @@
                                                 message.disable = reader.bool();
                                                 break;
                                             }
+                                        case 2: {
+                                                message.maxRephraseSteps = reader.int32();
+                                                break;
+                                            }
                                         default:
                                             reader.skipType(tag & 7);
                                             break;
@@ -39827,6 +44969,9 @@
                                     if (message.disable != null && message.hasOwnProperty("disable"))
                                         if (typeof message.disable !== "boolean")
                                             return "disable: boolean expected";
+                                    if (message.maxRephraseSteps != null && message.hasOwnProperty("maxRephraseSteps"))
+                                        if (!$util.isInteger(message.maxRephraseSteps))
+                                            return "maxRephraseSteps: integer expected";
                                     return null;
                                 };
     
@@ -39844,6 +44989,8 @@
                                     var message = new $root.google.cloud.discoveryengine.v1.AnswerQueryRequest.QueryUnderstandingSpec.QueryRephraserSpec();
                                     if (object.disable != null)
                                         message.disable = Boolean(object.disable);
+                                    if (object.maxRephraseSteps != null)
+                                        message.maxRephraseSteps = object.maxRephraseSteps | 0;
                                     return message;
                                 };
     
@@ -39860,10 +45007,14 @@
                                     if (!options)
                                         options = {};
                                     var object = {};
-                                    if (options.defaults)
+                                    if (options.defaults) {
                                         object.disable = false;
+                                        object.maxRephraseSteps = 0;
+                                    }
                                     if (message.disable != null && message.hasOwnProperty("disable"))
                                         object.disable = message.disable;
+                                    if (message.maxRephraseSteps != null && message.hasOwnProperty("maxRephraseSteps"))
+                                        object.maxRephraseSteps = message.maxRephraseSteps;
                                     return object;
                                 };
     
@@ -43190,6 +48341,7 @@
                          * @memberof google.cloud.discoveryengine.v1
                          * @interface IDocumentProcessingConfig
                          * @property {string|null} [name] DocumentProcessingConfig name
+                         * @property {google.cloud.discoveryengine.v1.DocumentProcessingConfig.IChunkingConfig|null} [chunkingConfig] DocumentProcessingConfig chunkingConfig
                          * @property {google.cloud.discoveryengine.v1.DocumentProcessingConfig.IParsingConfig|null} [defaultParsingConfig] DocumentProcessingConfig defaultParsingConfig
                          * @property {Object.<string,google.cloud.discoveryengine.v1.DocumentProcessingConfig.IParsingConfig>|null} [parsingConfigOverrides] DocumentProcessingConfig parsingConfigOverrides
                          */
@@ -43218,6 +48370,14 @@
                          */
                         DocumentProcessingConfig.prototype.name = "";
     
+                        /**
+                         * DocumentProcessingConfig chunkingConfig.
+                         * @member {google.cloud.discoveryengine.v1.DocumentProcessingConfig.IChunkingConfig|null|undefined} chunkingConfig
+                         * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig
+                         * @instance
+                         */
+                        DocumentProcessingConfig.prototype.chunkingConfig = null;
+    
                         /**
                          * DocumentProcessingConfig defaultParsingConfig.
                          * @member {google.cloud.discoveryengine.v1.DocumentProcessingConfig.IParsingConfig|null|undefined} defaultParsingConfig
@@ -43260,6 +48420,8 @@
                                 writer = $Writer.create();
                             if (message.name != null && Object.hasOwnProperty.call(message, "name"))
                                 writer.uint32(/* id 1, wireType 2 =*/10).string(message.name);
+                            if (message.chunkingConfig != null && Object.hasOwnProperty.call(message, "chunkingConfig"))
+                                $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.encode(message.chunkingConfig, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
                             if (message.defaultParsingConfig != null && Object.hasOwnProperty.call(message, "defaultParsingConfig"))
                                 $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.encode(message.defaultParsingConfig, writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
                             if (message.parsingConfigOverrides != null && Object.hasOwnProperty.call(message, "parsingConfigOverrides"))
@@ -43270,213 +48432,684 @@
                             return writer;
                         };
     
-                        /**
-                         * Encodes the specified DocumentProcessingConfig message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentProcessingConfig.verify|verify} messages.
-                         * @function encodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig
-                         * @static
-                         * @param {google.cloud.discoveryengine.v1.IDocumentProcessingConfig} message DocumentProcessingConfig message or plain object to encode
-                         * @param {$protobuf.Writer} [writer] Writer to encode to
-                         * @returns {$protobuf.Writer} Writer
-                         */
-                        DocumentProcessingConfig.encodeDelimited = function encodeDelimited(message, writer) {
-                            return this.encode(message, writer).ldelim();
-                        };
+                        /**
+                         * Encodes the specified DocumentProcessingConfig message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentProcessingConfig.verify|verify} messages.
+                         * @function encodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.IDocumentProcessingConfig} message DocumentProcessingConfig message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        DocumentProcessingConfig.encodeDelimited = function encodeDelimited(message, writer) {
+                            return this.encode(message, writer).ldelim();
+                        };
+    
+                        /**
+                         * Decodes a DocumentProcessingConfig message from the specified reader or buffer.
+                         * @function decode
+                         * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @param {number} [length] Message length if known beforehand
+                         * @returns {google.cloud.discoveryengine.v1.DocumentProcessingConfig} DocumentProcessingConfig
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        DocumentProcessingConfig.decode = function decode(reader, length) {
+                            if (!(reader instanceof $Reader))
+                                reader = $Reader.create(reader);
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig(), key, value;
+                            while (reader.pos < end) {
+                                var tag = reader.uint32();
+                                switch (tag >>> 3) {
+                                case 1: {
+                                        message.name = reader.string();
+                                        break;
+                                    }
+                                case 3: {
+                                        message.chunkingConfig = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 4: {
+                                        message.defaultParsingConfig = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 5: {
+                                        if (message.parsingConfigOverrides === $util.emptyObject)
+                                            message.parsingConfigOverrides = {};
+                                        var end2 = reader.uint32() + reader.pos;
+                                        key = "";
+                                        value = null;
+                                        while (reader.pos < end2) {
+                                            var tag2 = reader.uint32();
+                                            switch (tag2 >>> 3) {
+                                            case 1:
+                                                key = reader.string();
+                                                break;
+                                            case 2:
+                                                value = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.decode(reader, reader.uint32());
+                                                break;
+                                            default:
+                                                reader.skipType(tag2 & 7);
+                                                break;
+                                            }
+                                        }
+                                        message.parsingConfigOverrides[key] = value;
+                                        break;
+                                    }
+                                default:
+                                    reader.skipType(tag & 7);
+                                    break;
+                                }
+                            }
+                            return message;
+                        };
+    
+                        /**
+                         * Decodes a DocumentProcessingConfig message from the specified reader or buffer, length delimited.
+                         * @function decodeDelimited
+                         * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @returns {google.cloud.discoveryengine.v1.DocumentProcessingConfig} DocumentProcessingConfig
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        DocumentProcessingConfig.decodeDelimited = function decodeDelimited(reader) {
+                            if (!(reader instanceof $Reader))
+                                reader = new $Reader(reader);
+                            return this.decode(reader, reader.uint32());
+                        };
+    
+                        /**
+                         * Verifies a DocumentProcessingConfig message.
+                         * @function verify
+                         * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig
+                         * @static
+                         * @param {Object.<string,*>} message Plain object to verify
+                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                         */
+                        DocumentProcessingConfig.verify = function verify(message) {
+                            if (typeof message !== "object" || message === null)
+                                return "object expected";
+                            if (message.name != null && message.hasOwnProperty("name"))
+                                if (!$util.isString(message.name))
+                                    return "name: string expected";
+                            if (message.chunkingConfig != null && message.hasOwnProperty("chunkingConfig")) {
+                                var error = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.verify(message.chunkingConfig);
+                                if (error)
+                                    return "chunkingConfig." + error;
+                            }
+                            if (message.defaultParsingConfig != null && message.hasOwnProperty("defaultParsingConfig")) {
+                                var error = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.verify(message.defaultParsingConfig);
+                                if (error)
+                                    return "defaultParsingConfig." + error;
+                            }
+                            if (message.parsingConfigOverrides != null && message.hasOwnProperty("parsingConfigOverrides")) {
+                                if (!$util.isObject(message.parsingConfigOverrides))
+                                    return "parsingConfigOverrides: object expected";
+                                var key = Object.keys(message.parsingConfigOverrides);
+                                for (var i = 0; i < key.length; ++i) {
+                                    var error = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.verify(message.parsingConfigOverrides[key[i]]);
+                                    if (error)
+                                        return "parsingConfigOverrides." + error;
+                                }
+                            }
+                            return null;
+                        };
+    
+                        /**
+                         * Creates a DocumentProcessingConfig message from a plain object. Also converts values to their respective internal types.
+                         * @function fromObject
+                         * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig
+                         * @static
+                         * @param {Object.<string,*>} object Plain object
+                         * @returns {google.cloud.discoveryengine.v1.DocumentProcessingConfig} DocumentProcessingConfig
+                         */
+                        DocumentProcessingConfig.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig)
+                                return object;
+                            var message = new $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig();
+                            if (object.name != null)
+                                message.name = String(object.name);
+                            if (object.chunkingConfig != null) {
+                                if (typeof object.chunkingConfig !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.DocumentProcessingConfig.chunkingConfig: object expected");
+                                message.chunkingConfig = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.fromObject(object.chunkingConfig);
+                            }
+                            if (object.defaultParsingConfig != null) {
+                                if (typeof object.defaultParsingConfig !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.DocumentProcessingConfig.defaultParsingConfig: object expected");
+                                message.defaultParsingConfig = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.fromObject(object.defaultParsingConfig);
+                            }
+                            if (object.parsingConfigOverrides) {
+                                if (typeof object.parsingConfigOverrides !== "object")
+                                    throw TypeError(".google.cloud.discoveryengine.v1.DocumentProcessingConfig.parsingConfigOverrides: object expected");
+                                message.parsingConfigOverrides = {};
+                                for (var keys = Object.keys(object.parsingConfigOverrides), i = 0; i < keys.length; ++i) {
+                                    if (typeof object.parsingConfigOverrides[keys[i]] !== "object")
+                                        throw TypeError(".google.cloud.discoveryengine.v1.DocumentProcessingConfig.parsingConfigOverrides: object expected");
+                                    message.parsingConfigOverrides[keys[i]] = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.fromObject(object.parsingConfigOverrides[keys[i]]);
+                                }
+                            }
+                            return message;
+                        };
+    
+                        /**
+                         * Creates a plain object from a DocumentProcessingConfig message. Also converts values to other types if specified.
+                         * @function toObject
+                         * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig
+                         * @static
+                         * @param {google.cloud.discoveryengine.v1.DocumentProcessingConfig} message DocumentProcessingConfig
+                         * @param {$protobuf.IConversionOptions} [options] Conversion options
+                         * @returns {Object.<string,*>} Plain object
+                         */
+                        DocumentProcessingConfig.toObject = function toObject(message, options) {
+                            if (!options)
+                                options = {};
+                            var object = {};
+                            if (options.objects || options.defaults)
+                                object.parsingConfigOverrides = {};
+                            if (options.defaults) {
+                                object.name = "";
+                                object.chunkingConfig = null;
+                                object.defaultParsingConfig = null;
+                            }
+                            if (message.name != null && message.hasOwnProperty("name"))
+                                object.name = message.name;
+                            if (message.chunkingConfig != null && message.hasOwnProperty("chunkingConfig"))
+                                object.chunkingConfig = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.toObject(message.chunkingConfig, options);
+                            if (message.defaultParsingConfig != null && message.hasOwnProperty("defaultParsingConfig"))
+                                object.defaultParsingConfig = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.toObject(message.defaultParsingConfig, options);
+                            var keys2;
+                            if (message.parsingConfigOverrides && (keys2 = Object.keys(message.parsingConfigOverrides)).length) {
+                                object.parsingConfigOverrides = {};
+                                for (var j = 0; j < keys2.length; ++j)
+                                    object.parsingConfigOverrides[keys2[j]] = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.toObject(message.parsingConfigOverrides[keys2[j]], options);
+                            }
+                            return object;
+                        };
+    
+                        /**
+                         * Converts this DocumentProcessingConfig to JSON.
+                         * @function toJSON
+                         * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig
+                         * @instance
+                         * @returns {Object.<string,*>} JSON object
+                         */
+                        DocumentProcessingConfig.prototype.toJSON = function toJSON() {
+                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                        };
+    
+                        /**
+                         * Gets the default type url for DocumentProcessingConfig
+                         * @function getTypeUrl
+                         * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig
+                         * @static
+                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns {string} The default type url
+                         */
+                        DocumentProcessingConfig.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                            if (typeUrlPrefix === undefined) {
+                                typeUrlPrefix = "type.googleapis.com";
+                            }
+                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.DocumentProcessingConfig";
+                        };
+    
+                        DocumentProcessingConfig.ChunkingConfig = (function() {
+    
+                            /**
+                             * Properties of a ChunkingConfig.
+                             * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig
+                             * @interface IChunkingConfig
+                             * @property {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.ILayoutBasedChunkingConfig|null} [layoutBasedChunkingConfig] ChunkingConfig layoutBasedChunkingConfig
+                             */
+    
+                            /**
+                             * Constructs a new ChunkingConfig.
+                             * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig
+                             * @classdesc Represents a ChunkingConfig.
+                             * @implements IChunkingConfig
+                             * @constructor
+                             * @param {google.cloud.discoveryengine.v1.DocumentProcessingConfig.IChunkingConfig=} [properties] Properties to set
+                             */
+                            function ChunkingConfig(properties) {
+                                if (properties)
+                                    for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                        if (properties[keys[i]] != null)
+                                            this[keys[i]] = properties[keys[i]];
+                            }
+    
+                            /**
+                             * ChunkingConfig layoutBasedChunkingConfig.
+                             * @member {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.ILayoutBasedChunkingConfig|null|undefined} layoutBasedChunkingConfig
+                             * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig
+                             * @instance
+                             */
+                            ChunkingConfig.prototype.layoutBasedChunkingConfig = null;
+    
+                            // OneOf field names bound to virtual getters and setters
+                            var $oneOfFields;
+    
+                            /**
+                             * ChunkingConfig chunkMode.
+                             * @member {"layoutBasedChunkingConfig"|undefined} chunkMode
+                             * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig
+                             * @instance
+                             */
+                            Object.defineProperty(ChunkingConfig.prototype, "chunkMode", {
+                                get: $util.oneOfGetter($oneOfFields = ["layoutBasedChunkingConfig"]),
+                                set: $util.oneOfSetter($oneOfFields)
+                            });
+    
+                            /**
+                             * Creates a new ChunkingConfig instance using the specified properties.
+                             * @function create
+                             * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.DocumentProcessingConfig.IChunkingConfig=} [properties] Properties to set
+                             * @returns {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig} ChunkingConfig instance
+                             */
+                            ChunkingConfig.create = function create(properties) {
+                                return new ChunkingConfig(properties);
+                            };
+    
+                            /**
+                             * Encodes the specified ChunkingConfig message. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.verify|verify} messages.
+                             * @function encode
+                             * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.DocumentProcessingConfig.IChunkingConfig} message ChunkingConfig message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            ChunkingConfig.encode = function encode(message, writer) {
+                                if (!writer)
+                                    writer = $Writer.create();
+                                if (message.layoutBasedChunkingConfig != null && Object.hasOwnProperty.call(message, "layoutBasedChunkingConfig"))
+                                    $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig.encode(message.layoutBasedChunkingConfig, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                                return writer;
+                            };
+    
+                            /**
+                             * Encodes the specified ChunkingConfig message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.verify|verify} messages.
+                             * @function encodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.DocumentProcessingConfig.IChunkingConfig} message ChunkingConfig message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            ChunkingConfig.encodeDelimited = function encodeDelimited(message, writer) {
+                                return this.encode(message, writer).ldelim();
+                            };
+    
+                            /**
+                             * Decodes a ChunkingConfig message from the specified reader or buffer.
+                             * @function decode
+                             * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @param {number} [length] Message length if known beforehand
+                             * @returns {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig} ChunkingConfig
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            ChunkingConfig.decode = function decode(reader, length) {
+                                if (!(reader instanceof $Reader))
+                                    reader = $Reader.create(reader);
+                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig();
+                                while (reader.pos < end) {
+                                    var tag = reader.uint32();
+                                    switch (tag >>> 3) {
+                                    case 1: {
+                                            message.layoutBasedChunkingConfig = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig.decode(reader, reader.uint32());
+                                            break;
+                                        }
+                                    default:
+                                        reader.skipType(tag & 7);
+                                        break;
+                                    }
+                                }
+                                return message;
+                            };
+    
+                            /**
+                             * Decodes a ChunkingConfig message from the specified reader or buffer, length delimited.
+                             * @function decodeDelimited
+                             * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @returns {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig} ChunkingConfig
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            ChunkingConfig.decodeDelimited = function decodeDelimited(reader) {
+                                if (!(reader instanceof $Reader))
+                                    reader = new $Reader(reader);
+                                return this.decode(reader, reader.uint32());
+                            };
+    
+                            /**
+                             * Verifies a ChunkingConfig message.
+                             * @function verify
+                             * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig
+                             * @static
+                             * @param {Object.<string,*>} message Plain object to verify
+                             * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                             */
+                            ChunkingConfig.verify = function verify(message) {
+                                if (typeof message !== "object" || message === null)
+                                    return "object expected";
+                                var properties = {};
+                                if (message.layoutBasedChunkingConfig != null && message.hasOwnProperty("layoutBasedChunkingConfig")) {
+                                    properties.chunkMode = 1;
+                                    {
+                                        var error = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig.verify(message.layoutBasedChunkingConfig);
+                                        if (error)
+                                            return "layoutBasedChunkingConfig." + error;
+                                    }
+                                }
+                                return null;
+                            };
+    
+                            /**
+                             * Creates a ChunkingConfig message from a plain object. Also converts values to their respective internal types.
+                             * @function fromObject
+                             * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig
+                             * @static
+                             * @param {Object.<string,*>} object Plain object
+                             * @returns {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig} ChunkingConfig
+                             */
+                            ChunkingConfig.fromObject = function fromObject(object) {
+                                if (object instanceof $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig)
+                                    return object;
+                                var message = new $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig();
+                                if (object.layoutBasedChunkingConfig != null) {
+                                    if (typeof object.layoutBasedChunkingConfig !== "object")
+                                        throw TypeError(".google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.layoutBasedChunkingConfig: object expected");
+                                    message.layoutBasedChunkingConfig = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig.fromObject(object.layoutBasedChunkingConfig);
+                                }
+                                return message;
+                            };
+    
+                            /**
+                             * Creates a plain object from a ChunkingConfig message. Also converts values to other types if specified.
+                             * @function toObject
+                             * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig
+                             * @static
+                             * @param {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig} message ChunkingConfig
+                             * @param {$protobuf.IConversionOptions} [options] Conversion options
+                             * @returns {Object.<string,*>} Plain object
+                             */
+                            ChunkingConfig.toObject = function toObject(message, options) {
+                                if (!options)
+                                    options = {};
+                                var object = {};
+                                if (message.layoutBasedChunkingConfig != null && message.hasOwnProperty("layoutBasedChunkingConfig")) {
+                                    object.layoutBasedChunkingConfig = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig.toObject(message.layoutBasedChunkingConfig, options);
+                                    if (options.oneofs)
+                                        object.chunkMode = "layoutBasedChunkingConfig";
+                                }
+                                return object;
+                            };
+    
+                            /**
+                             * Converts this ChunkingConfig to JSON.
+                             * @function toJSON
+                             * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig
+                             * @instance
+                             * @returns {Object.<string,*>} JSON object
+                             */
+                            ChunkingConfig.prototype.toJSON = function toJSON() {
+                                return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                            };
+    
+                            /**
+                             * Gets the default type url for ChunkingConfig
+                             * @function getTypeUrl
+                             * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig
+                             * @static
+                             * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                             * @returns {string} The default type url
+                             */
+                            ChunkingConfig.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                                if (typeUrlPrefix === undefined) {
+                                    typeUrlPrefix = "type.googleapis.com";
+                                }
+                                return typeUrlPrefix + "/google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig";
+                            };
+    
+                            ChunkingConfig.LayoutBasedChunkingConfig = (function() {
+    
+                                /**
+                                 * Properties of a LayoutBasedChunkingConfig.
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig
+                                 * @interface ILayoutBasedChunkingConfig
+                                 * @property {number|null} [chunkSize] LayoutBasedChunkingConfig chunkSize
+                                 * @property {boolean|null} [includeAncestorHeadings] LayoutBasedChunkingConfig includeAncestorHeadings
+                                 */
+    
+                                /**
+                                 * Constructs a new LayoutBasedChunkingConfig.
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig
+                                 * @classdesc Represents a LayoutBasedChunkingConfig.
+                                 * @implements ILayoutBasedChunkingConfig
+                                 * @constructor
+                                 * @param {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.ILayoutBasedChunkingConfig=} [properties] Properties to set
+                                 */
+                                function LayoutBasedChunkingConfig(properties) {
+                                    if (properties)
+                                        for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                            if (properties[keys[i]] != null)
+                                                this[keys[i]] = properties[keys[i]];
+                                }
+    
+                                /**
+                                 * LayoutBasedChunkingConfig chunkSize.
+                                 * @member {number} chunkSize
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig
+                                 * @instance
+                                 */
+                                LayoutBasedChunkingConfig.prototype.chunkSize = 0;
+    
+                                /**
+                                 * LayoutBasedChunkingConfig includeAncestorHeadings.
+                                 * @member {boolean} includeAncestorHeadings
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig
+                                 * @instance
+                                 */
+                                LayoutBasedChunkingConfig.prototype.includeAncestorHeadings = false;
+    
+                                /**
+                                 * Creates a new LayoutBasedChunkingConfig instance using the specified properties.
+                                 * @function create
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig
+                                 * @static
+                                 * @param {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.ILayoutBasedChunkingConfig=} [properties] Properties to set
+                                 * @returns {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig} LayoutBasedChunkingConfig instance
+                                 */
+                                LayoutBasedChunkingConfig.create = function create(properties) {
+                                    return new LayoutBasedChunkingConfig(properties);
+                                };
+    
+                                /**
+                                 * Encodes the specified LayoutBasedChunkingConfig message. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig.verify|verify} messages.
+                                 * @function encode
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig
+                                 * @static
+                                 * @param {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.ILayoutBasedChunkingConfig} message LayoutBasedChunkingConfig message or plain object to encode
+                                 * @param {$protobuf.Writer} [writer] Writer to encode to
+                                 * @returns {$protobuf.Writer} Writer
+                                 */
+                                LayoutBasedChunkingConfig.encode = function encode(message, writer) {
+                                    if (!writer)
+                                        writer = $Writer.create();
+                                    if (message.chunkSize != null && Object.hasOwnProperty.call(message, "chunkSize"))
+                                        writer.uint32(/* id 1, wireType 0 =*/8).int32(message.chunkSize);
+                                    if (message.includeAncestorHeadings != null && Object.hasOwnProperty.call(message, "includeAncestorHeadings"))
+                                        writer.uint32(/* id 2, wireType 0 =*/16).bool(message.includeAncestorHeadings);
+                                    return writer;
+                                };
+    
+                                /**
+                                 * Encodes the specified LayoutBasedChunkingConfig message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig.verify|verify} messages.
+                                 * @function encodeDelimited
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig
+                                 * @static
+                                 * @param {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.ILayoutBasedChunkingConfig} message LayoutBasedChunkingConfig message or plain object to encode
+                                 * @param {$protobuf.Writer} [writer] Writer to encode to
+                                 * @returns {$protobuf.Writer} Writer
+                                 */
+                                LayoutBasedChunkingConfig.encodeDelimited = function encodeDelimited(message, writer) {
+                                    return this.encode(message, writer).ldelim();
+                                };
     
-                        /**
-                         * Decodes a DocumentProcessingConfig message from the specified reader or buffer.
-                         * @function decode
-                         * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig
-                         * @static
-                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @param {number} [length] Message length if known beforehand
-                         * @returns {google.cloud.discoveryengine.v1.DocumentProcessingConfig} DocumentProcessingConfig
-                         * @throws {Error} If the payload is not a reader or valid buffer
-                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                         */
-                        DocumentProcessingConfig.decode = function decode(reader, length) {
-                            if (!(reader instanceof $Reader))
-                                reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig(), key, value;
-                            while (reader.pos < end) {
-                                var tag = reader.uint32();
-                                switch (tag >>> 3) {
-                                case 1: {
-                                        message.name = reader.string();
-                                        break;
-                                    }
-                                case 4: {
-                                        message.defaultParsingConfig = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                case 5: {
-                                        if (message.parsingConfigOverrides === $util.emptyObject)
-                                            message.parsingConfigOverrides = {};
-                                        var end2 = reader.uint32() + reader.pos;
-                                        key = "";
-                                        value = null;
-                                        while (reader.pos < end2) {
-                                            var tag2 = reader.uint32();
-                                            switch (tag2 >>> 3) {
-                                            case 1:
-                                                key = reader.string();
-                                                break;
-                                            case 2:
-                                                value = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.decode(reader, reader.uint32());
+                                /**
+                                 * Decodes a LayoutBasedChunkingConfig message from the specified reader or buffer.
+                                 * @function decode
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig
+                                 * @static
+                                 * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                                 * @param {number} [length] Message length if known beforehand
+                                 * @returns {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig} LayoutBasedChunkingConfig
+                                 * @throws {Error} If the payload is not a reader or valid buffer
+                                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                                 */
+                                LayoutBasedChunkingConfig.decode = function decode(reader, length) {
+                                    if (!(reader instanceof $Reader))
+                                        reader = $Reader.create(reader);
+                                    var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig();
+                                    while (reader.pos < end) {
+                                        var tag = reader.uint32();
+                                        switch (tag >>> 3) {
+                                        case 1: {
+                                                message.chunkSize = reader.int32();
                                                 break;
-                                            default:
-                                                reader.skipType(tag2 & 7);
+                                            }
+                                        case 2: {
+                                                message.includeAncestorHeadings = reader.bool();
                                                 break;
                                             }
+                                        default:
+                                            reader.skipType(tag & 7);
+                                            break;
                                         }
-                                        message.parsingConfigOverrides[key] = value;
-                                        break;
                                     }
-                                default:
-                                    reader.skipType(tag & 7);
-                                    break;
-                                }
-                            }
-                            return message;
-                        };
+                                    return message;
+                                };
     
-                        /**
-                         * Decodes a DocumentProcessingConfig message from the specified reader or buffer, length delimited.
-                         * @function decodeDelimited
-                         * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig
-                         * @static
-                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.cloud.discoveryengine.v1.DocumentProcessingConfig} DocumentProcessingConfig
-                         * @throws {Error} If the payload is not a reader or valid buffer
-                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                         */
-                        DocumentProcessingConfig.decodeDelimited = function decodeDelimited(reader) {
-                            if (!(reader instanceof $Reader))
-                                reader = new $Reader(reader);
-                            return this.decode(reader, reader.uint32());
-                        };
+                                /**
+                                 * Decodes a LayoutBasedChunkingConfig message from the specified reader or buffer, length delimited.
+                                 * @function decodeDelimited
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig
+                                 * @static
+                                 * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                                 * @returns {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig} LayoutBasedChunkingConfig
+                                 * @throws {Error} If the payload is not a reader or valid buffer
+                                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                                 */
+                                LayoutBasedChunkingConfig.decodeDelimited = function decodeDelimited(reader) {
+                                    if (!(reader instanceof $Reader))
+                                        reader = new $Reader(reader);
+                                    return this.decode(reader, reader.uint32());
+                                };
     
-                        /**
-                         * Verifies a DocumentProcessingConfig message.
-                         * @function verify
-                         * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig
-                         * @static
-                         * @param {Object.<string,*>} message Plain object to verify
-                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
-                         */
-                        DocumentProcessingConfig.verify = function verify(message) {
-                            if (typeof message !== "object" || message === null)
-                                return "object expected";
-                            if (message.name != null && message.hasOwnProperty("name"))
-                                if (!$util.isString(message.name))
-                                    return "name: string expected";
-                            if (message.defaultParsingConfig != null && message.hasOwnProperty("defaultParsingConfig")) {
-                                var error = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.verify(message.defaultParsingConfig);
-                                if (error)
-                                    return "defaultParsingConfig." + error;
-                            }
-                            if (message.parsingConfigOverrides != null && message.hasOwnProperty("parsingConfigOverrides")) {
-                                if (!$util.isObject(message.parsingConfigOverrides))
-                                    return "parsingConfigOverrides: object expected";
-                                var key = Object.keys(message.parsingConfigOverrides);
-                                for (var i = 0; i < key.length; ++i) {
-                                    var error = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.verify(message.parsingConfigOverrides[key[i]]);
-                                    if (error)
-                                        return "parsingConfigOverrides." + error;
-                                }
-                            }
-                            return null;
-                        };
+                                /**
+                                 * Verifies a LayoutBasedChunkingConfig message.
+                                 * @function verify
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig
+                                 * @static
+                                 * @param {Object.<string,*>} message Plain object to verify
+                                 * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                                 */
+                                LayoutBasedChunkingConfig.verify = function verify(message) {
+                                    if (typeof message !== "object" || message === null)
+                                        return "object expected";
+                                    if (message.chunkSize != null && message.hasOwnProperty("chunkSize"))
+                                        if (!$util.isInteger(message.chunkSize))
+                                            return "chunkSize: integer expected";
+                                    if (message.includeAncestorHeadings != null && message.hasOwnProperty("includeAncestorHeadings"))
+                                        if (typeof message.includeAncestorHeadings !== "boolean")
+                                            return "includeAncestorHeadings: boolean expected";
+                                    return null;
+                                };
     
-                        /**
-                         * Creates a DocumentProcessingConfig message from a plain object. Also converts values to their respective internal types.
-                         * @function fromObject
-                         * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig
-                         * @static
-                         * @param {Object.<string,*>} object Plain object
-                         * @returns {google.cloud.discoveryengine.v1.DocumentProcessingConfig} DocumentProcessingConfig
-                         */
-                        DocumentProcessingConfig.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig)
-                                return object;
-                            var message = new $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig();
-                            if (object.name != null)
-                                message.name = String(object.name);
-                            if (object.defaultParsingConfig != null) {
-                                if (typeof object.defaultParsingConfig !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.DocumentProcessingConfig.defaultParsingConfig: object expected");
-                                message.defaultParsingConfig = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.fromObject(object.defaultParsingConfig);
-                            }
-                            if (object.parsingConfigOverrides) {
-                                if (typeof object.parsingConfigOverrides !== "object")
-                                    throw TypeError(".google.cloud.discoveryengine.v1.DocumentProcessingConfig.parsingConfigOverrides: object expected");
-                                message.parsingConfigOverrides = {};
-                                for (var keys = Object.keys(object.parsingConfigOverrides), i = 0; i < keys.length; ++i) {
-                                    if (typeof object.parsingConfigOverrides[keys[i]] !== "object")
-                                        throw TypeError(".google.cloud.discoveryengine.v1.DocumentProcessingConfig.parsingConfigOverrides: object expected");
-                                    message.parsingConfigOverrides[keys[i]] = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.fromObject(object.parsingConfigOverrides[keys[i]]);
-                                }
-                            }
-                            return message;
-                        };
+                                /**
+                                 * Creates a LayoutBasedChunkingConfig message from a plain object. Also converts values to their respective internal types.
+                                 * @function fromObject
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig
+                                 * @static
+                                 * @param {Object.<string,*>} object Plain object
+                                 * @returns {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig} LayoutBasedChunkingConfig
+                                 */
+                                LayoutBasedChunkingConfig.fromObject = function fromObject(object) {
+                                    if (object instanceof $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig)
+                                        return object;
+                                    var message = new $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig();
+                                    if (object.chunkSize != null)
+                                        message.chunkSize = object.chunkSize | 0;
+                                    if (object.includeAncestorHeadings != null)
+                                        message.includeAncestorHeadings = Boolean(object.includeAncestorHeadings);
+                                    return message;
+                                };
     
-                        /**
-                         * Creates a plain object from a DocumentProcessingConfig message. Also converts values to other types if specified.
-                         * @function toObject
-                         * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig
-                         * @static
-                         * @param {google.cloud.discoveryengine.v1.DocumentProcessingConfig} message DocumentProcessingConfig
-                         * @param {$protobuf.IConversionOptions} [options] Conversion options
-                         * @returns {Object.<string,*>} Plain object
-                         */
-                        DocumentProcessingConfig.toObject = function toObject(message, options) {
-                            if (!options)
-                                options = {};
-                            var object = {};
-                            if (options.objects || options.defaults)
-                                object.parsingConfigOverrides = {};
-                            if (options.defaults) {
-                                object.name = "";
-                                object.defaultParsingConfig = null;
-                            }
-                            if (message.name != null && message.hasOwnProperty("name"))
-                                object.name = message.name;
-                            if (message.defaultParsingConfig != null && message.hasOwnProperty("defaultParsingConfig"))
-                                object.defaultParsingConfig = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.toObject(message.defaultParsingConfig, options);
-                            var keys2;
-                            if (message.parsingConfigOverrides && (keys2 = Object.keys(message.parsingConfigOverrides)).length) {
-                                object.parsingConfigOverrides = {};
-                                for (var j = 0; j < keys2.length; ++j)
-                                    object.parsingConfigOverrides[keys2[j]] = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.toObject(message.parsingConfigOverrides[keys2[j]], options);
-                            }
-                            return object;
-                        };
+                                /**
+                                 * Creates a plain object from a LayoutBasedChunkingConfig message. Also converts values to other types if specified.
+                                 * @function toObject
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig
+                                 * @static
+                                 * @param {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig} message LayoutBasedChunkingConfig
+                                 * @param {$protobuf.IConversionOptions} [options] Conversion options
+                                 * @returns {Object.<string,*>} Plain object
+                                 */
+                                LayoutBasedChunkingConfig.toObject = function toObject(message, options) {
+                                    if (!options)
+                                        options = {};
+                                    var object = {};
+                                    if (options.defaults) {
+                                        object.chunkSize = 0;
+                                        object.includeAncestorHeadings = false;
+                                    }
+                                    if (message.chunkSize != null && message.hasOwnProperty("chunkSize"))
+                                        object.chunkSize = message.chunkSize;
+                                    if (message.includeAncestorHeadings != null && message.hasOwnProperty("includeAncestorHeadings"))
+                                        object.includeAncestorHeadings = message.includeAncestorHeadings;
+                                    return object;
+                                };
     
-                        /**
-                         * Converts this DocumentProcessingConfig to JSON.
-                         * @function toJSON
-                         * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig
-                         * @instance
-                         * @returns {Object.<string,*>} JSON object
-                         */
-                        DocumentProcessingConfig.prototype.toJSON = function toJSON() {
-                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
-                        };
+                                /**
+                                 * Converts this LayoutBasedChunkingConfig to JSON.
+                                 * @function toJSON
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig
+                                 * @instance
+                                 * @returns {Object.<string,*>} JSON object
+                                 */
+                                LayoutBasedChunkingConfig.prototype.toJSON = function toJSON() {
+                                    return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                                };
     
-                        /**
-                         * Gets the default type url for DocumentProcessingConfig
-                         * @function getTypeUrl
-                         * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig
-                         * @static
-                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                         * @returns {string} The default type url
-                         */
-                        DocumentProcessingConfig.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
-                            if (typeUrlPrefix === undefined) {
-                                typeUrlPrefix = "type.googleapis.com";
-                            }
-                            return typeUrlPrefix + "/google.cloud.discoveryengine.v1.DocumentProcessingConfig";
-                        };
+                                /**
+                                 * Gets the default type url for LayoutBasedChunkingConfig
+                                 * @function getTypeUrl
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig
+                                 * @static
+                                 * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                                 * @returns {string} The default type url
+                                 */
+                                LayoutBasedChunkingConfig.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                                    if (typeUrlPrefix === undefined) {
+                                        typeUrlPrefix = "type.googleapis.com";
+                                    }
+                                    return typeUrlPrefix + "/google.cloud.discoveryengine.v1.DocumentProcessingConfig.ChunkingConfig.LayoutBasedChunkingConfig";
+                                };
+    
+                                return LayoutBasedChunkingConfig;
+                            })();
+    
+                            return ChunkingConfig;
+                        })();
     
                         DocumentProcessingConfig.ParsingConfig = (function() {
     
@@ -43486,6 +49119,7 @@
                              * @interface IParsingConfig
                              * @property {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.IDigitalParsingConfig|null} [digitalParsingConfig] ParsingConfig digitalParsingConfig
                              * @property {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.IOcrParsingConfig|null} [ocrParsingConfig] ParsingConfig ocrParsingConfig
+                             * @property {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.ILayoutParsingConfig|null} [layoutParsingConfig] ParsingConfig layoutParsingConfig
                              */
     
                             /**
@@ -43519,17 +49153,25 @@
                              */
                             ParsingConfig.prototype.ocrParsingConfig = null;
     
+                            /**
+                             * ParsingConfig layoutParsingConfig.
+                             * @member {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.ILayoutParsingConfig|null|undefined} layoutParsingConfig
+                             * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig
+                             * @instance
+                             */
+                            ParsingConfig.prototype.layoutParsingConfig = null;
+    
                             // OneOf field names bound to virtual getters and setters
                             var $oneOfFields;
     
                             /**
                              * ParsingConfig typeDedicatedConfig.
-                             * @member {"digitalParsingConfig"|"ocrParsingConfig"|undefined} typeDedicatedConfig
+                             * @member {"digitalParsingConfig"|"ocrParsingConfig"|"layoutParsingConfig"|undefined} typeDedicatedConfig
                              * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig
                              * @instance
                              */
                             Object.defineProperty(ParsingConfig.prototype, "typeDedicatedConfig", {
-                                get: $util.oneOfGetter($oneOfFields = ["digitalParsingConfig", "ocrParsingConfig"]),
+                                get: $util.oneOfGetter($oneOfFields = ["digitalParsingConfig", "ocrParsingConfig", "layoutParsingConfig"]),
                                 set: $util.oneOfSetter($oneOfFields)
                             });
     
@@ -43561,6 +49203,8 @@
                                     $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.DigitalParsingConfig.encode(message.digitalParsingConfig, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
                                 if (message.ocrParsingConfig != null && Object.hasOwnProperty.call(message, "ocrParsingConfig"))
                                     $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.OcrParsingConfig.encode(message.ocrParsingConfig, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                                if (message.layoutParsingConfig != null && Object.hasOwnProperty.call(message, "layoutParsingConfig"))
+                                    $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig.encode(message.layoutParsingConfig, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
                                 return writer;
                             };
     
@@ -43603,6 +49247,10 @@
                                             message.ocrParsingConfig = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.OcrParsingConfig.decode(reader, reader.uint32());
                                             break;
                                         }
+                                    case 3: {
+                                            message.layoutParsingConfig = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig.decode(reader, reader.uint32());
+                                            break;
+                                        }
                                     default:
                                         reader.skipType(tag & 7);
                                         break;
@@ -43657,6 +49305,16 @@
                                             return "ocrParsingConfig." + error;
                                     }
                                 }
+                                if (message.layoutParsingConfig != null && message.hasOwnProperty("layoutParsingConfig")) {
+                                    if (properties.typeDedicatedConfig === 1)
+                                        return "typeDedicatedConfig: multiple values";
+                                    properties.typeDedicatedConfig = 1;
+                                    {
+                                        var error = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig.verify(message.layoutParsingConfig);
+                                        if (error)
+                                            return "layoutParsingConfig." + error;
+                                    }
+                                }
                                 return null;
                             };
     
@@ -43682,6 +49340,11 @@
                                         throw TypeError(".google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.ocrParsingConfig: object expected");
                                     message.ocrParsingConfig = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.OcrParsingConfig.fromObject(object.ocrParsingConfig);
                                 }
+                                if (object.layoutParsingConfig != null) {
+                                    if (typeof object.layoutParsingConfig !== "object")
+                                        throw TypeError(".google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.layoutParsingConfig: object expected");
+                                    message.layoutParsingConfig = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig.fromObject(object.layoutParsingConfig);
+                                }
                                 return message;
                             };
     
@@ -43708,6 +49371,11 @@
                                     if (options.oneofs)
                                         object.typeDedicatedConfig = "ocrParsingConfig";
                                 }
+                                if (message.layoutParsingConfig != null && message.hasOwnProperty("layoutParsingConfig")) {
+                                    object.layoutParsingConfig = $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig.toObject(message.layoutParsingConfig, options);
+                                    if (options.oneofs)
+                                        object.typeDedicatedConfig = "layoutParsingConfig";
+                                }
                                 return object;
                             };
     
@@ -44155,6 +49823,181 @@
                                 return OcrParsingConfig;
                             })();
     
+                            ParsingConfig.LayoutParsingConfig = (function() {
+    
+                                /**
+                                 * Properties of a LayoutParsingConfig.
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig
+                                 * @interface ILayoutParsingConfig
+                                 */
+    
+                                /**
+                                 * Constructs a new LayoutParsingConfig.
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig
+                                 * @classdesc Represents a LayoutParsingConfig.
+                                 * @implements ILayoutParsingConfig
+                                 * @constructor
+                                 * @param {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.ILayoutParsingConfig=} [properties] Properties to set
+                                 */
+                                function LayoutParsingConfig(properties) {
+                                    if (properties)
+                                        for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                            if (properties[keys[i]] != null)
+                                                this[keys[i]] = properties[keys[i]];
+                                }
+    
+                                /**
+                                 * Creates a new LayoutParsingConfig instance using the specified properties.
+                                 * @function create
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig
+                                 * @static
+                                 * @param {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.ILayoutParsingConfig=} [properties] Properties to set
+                                 * @returns {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig} LayoutParsingConfig instance
+                                 */
+                                LayoutParsingConfig.create = function create(properties) {
+                                    return new LayoutParsingConfig(properties);
+                                };
+    
+                                /**
+                                 * Encodes the specified LayoutParsingConfig message. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig.verify|verify} messages.
+                                 * @function encode
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig
+                                 * @static
+                                 * @param {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.ILayoutParsingConfig} message LayoutParsingConfig message or plain object to encode
+                                 * @param {$protobuf.Writer} [writer] Writer to encode to
+                                 * @returns {$protobuf.Writer} Writer
+                                 */
+                                LayoutParsingConfig.encode = function encode(message, writer) {
+                                    if (!writer)
+                                        writer = $Writer.create();
+                                    return writer;
+                                };
+    
+                                /**
+                                 * Encodes the specified LayoutParsingConfig message, length delimited. Does not implicitly {@link google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig.verify|verify} messages.
+                                 * @function encodeDelimited
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig
+                                 * @static
+                                 * @param {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.ILayoutParsingConfig} message LayoutParsingConfig message or plain object to encode
+                                 * @param {$protobuf.Writer} [writer] Writer to encode to
+                                 * @returns {$protobuf.Writer} Writer
+                                 */
+                                LayoutParsingConfig.encodeDelimited = function encodeDelimited(message, writer) {
+                                    return this.encode(message, writer).ldelim();
+                                };
+    
+                                /**
+                                 * Decodes a LayoutParsingConfig message from the specified reader or buffer.
+                                 * @function decode
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig
+                                 * @static
+                                 * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                                 * @param {number} [length] Message length if known beforehand
+                                 * @returns {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig} LayoutParsingConfig
+                                 * @throws {Error} If the payload is not a reader or valid buffer
+                                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                                 */
+                                LayoutParsingConfig.decode = function decode(reader, length) {
+                                    if (!(reader instanceof $Reader))
+                                        reader = $Reader.create(reader);
+                                    var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig();
+                                    while (reader.pos < end) {
+                                        var tag = reader.uint32();
+                                        switch (tag >>> 3) {
+                                        default:
+                                            reader.skipType(tag & 7);
+                                            break;
+                                        }
+                                    }
+                                    return message;
+                                };
+    
+                                /**
+                                 * Decodes a LayoutParsingConfig message from the specified reader or buffer, length delimited.
+                                 * @function decodeDelimited
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig
+                                 * @static
+                                 * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                                 * @returns {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig} LayoutParsingConfig
+                                 * @throws {Error} If the payload is not a reader or valid buffer
+                                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                                 */
+                                LayoutParsingConfig.decodeDelimited = function decodeDelimited(reader) {
+                                    if (!(reader instanceof $Reader))
+                                        reader = new $Reader(reader);
+                                    return this.decode(reader, reader.uint32());
+                                };
+    
+                                /**
+                                 * Verifies a LayoutParsingConfig message.
+                                 * @function verify
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig
+                                 * @static
+                                 * @param {Object.<string,*>} message Plain object to verify
+                                 * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                                 */
+                                LayoutParsingConfig.verify = function verify(message) {
+                                    if (typeof message !== "object" || message === null)
+                                        return "object expected";
+                                    return null;
+                                };
+    
+                                /**
+                                 * Creates a LayoutParsingConfig message from a plain object. Also converts values to their respective internal types.
+                                 * @function fromObject
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig
+                                 * @static
+                                 * @param {Object.<string,*>} object Plain object
+                                 * @returns {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig} LayoutParsingConfig
+                                 */
+                                LayoutParsingConfig.fromObject = function fromObject(object) {
+                                    if (object instanceof $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig)
+                                        return object;
+                                    return new $root.google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig();
+                                };
+    
+                                /**
+                                 * Creates a plain object from a LayoutParsingConfig message. Also converts values to other types if specified.
+                                 * @function toObject
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig
+                                 * @static
+                                 * @param {google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig} message LayoutParsingConfig
+                                 * @param {$protobuf.IConversionOptions} [options] Conversion options
+                                 * @returns {Object.<string,*>} Plain object
+                                 */
+                                LayoutParsingConfig.toObject = function toObject() {
+                                    return {};
+                                };
+    
+                                /**
+                                 * Converts this LayoutParsingConfig to JSON.
+                                 * @function toJSON
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig
+                                 * @instance
+                                 * @returns {Object.<string,*>} JSON object
+                                 */
+                                LayoutParsingConfig.prototype.toJSON = function toJSON() {
+                                    return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                                };
+    
+                                /**
+                                 * Gets the default type url for LayoutParsingConfig
+                                 * @function getTypeUrl
+                                 * @memberof google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig
+                                 * @static
+                                 * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                                 * @returns {string} The default type url
+                                 */
+                                LayoutParsingConfig.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                                    if (typeUrlPrefix === undefined) {
+                                        typeUrlPrefix = "type.googleapis.com";
+                                    }
+                                    return typeUrlPrefix + "/google.cloud.discoveryengine.v1.DocumentProcessingConfig.ParsingConfig.LayoutParsingConfig";
+                                };
+    
+                                return LayoutParsingConfig;
+                            })();
+    
                             return ParsingConfig;
                         })();
     
diff --git a/packages/google-cloud-discoveryengine/protos/protos.json b/packages/google-cloud-discoveryengine/protos/protos.json
index d9ef2d2619a..e7d2421d50c 100644
--- a/packages/google-cloud-discoveryengine/protos/protos.json
+++ b/packages/google-cloud-discoveryengine/protos/protos.json
@@ -16,8 +16,8 @@
                     "objc_class_prefix": "DISCOVERYENGINE",
                     "php_namespace": "Google\\Cloud\\DiscoveryEngine\\V1",
                     "ruby_package": "Google::Cloud::DiscoveryEngine::V1",
-                    "(google.api.resource_definition).type": "discoveryengine.googleapis.com/Chunk",
-                    "(google.api.resource_definition).pattern": "projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}"
+                    "(google.api.resource_definition).type": "healthcare.googleapis.com/FhirStore",
+                    "(google.api.resource_definition).pattern": "projects/{project}/locations/{location}/datasets/{dataset}/fhirStores/{fhir_store}"
                   },
                   "nested": {
                     "Answer": {
@@ -317,6 +317,10 @@
                                           "rule": "repeated",
                                           "type": "ChunkInfo",
                                           "id": 5
+                                        },
+                                        "structData": {
+                                          "type": "google.protobuf.Struct",
+                                          "id": 6
                                         }
                                       },
                                       "nested": {
@@ -420,7 +424,109 @@
                             "ADVERSARIAL_QUERY_IGNORED": 1,
                             "NON_ANSWER_SEEKING_QUERY_IGNORED": 2,
                             "OUT_OF_DOMAIN_QUERY_IGNORED": 3,
-                            "POTENTIAL_POLICY_VIOLATION": 4
+                            "POTENTIAL_POLICY_VIOLATION": 4,
+                            "NO_RELEVANT_CONTENT": 5
+                          }
+                        }
+                      }
+                    },
+                    "Chunk": {
+                      "options": {
+                        "(google.api.resource).type": "discoveryengine.googleapis.com/Chunk",
+                        "(google.api.resource).pattern": "projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}"
+                      },
+                      "oneofs": {
+                        "_relevanceScore": {
+                          "oneof": [
+                            "relevanceScore"
+                          ]
+                        }
+                      },
+                      "fields": {
+                        "name": {
+                          "type": "string",
+                          "id": 1
+                        },
+                        "id": {
+                          "type": "string",
+                          "id": 2
+                        },
+                        "content": {
+                          "type": "string",
+                          "id": 3
+                        },
+                        "relevanceScore": {
+                          "type": "double",
+                          "id": 8,
+                          "options": {
+                            "(google.api.field_behavior)": "OUTPUT_ONLY",
+                            "proto3_optional": true
+                          }
+                        },
+                        "documentMetadata": {
+                          "type": "DocumentMetadata",
+                          "id": 5
+                        },
+                        "derivedStructData": {
+                          "type": "google.protobuf.Struct",
+                          "id": 4,
+                          "options": {
+                            "(google.api.field_behavior)": "OUTPUT_ONLY"
+                          }
+                        },
+                        "pageSpan": {
+                          "type": "PageSpan",
+                          "id": 6
+                        },
+                        "chunkMetadata": {
+                          "type": "ChunkMetadata",
+                          "id": 7,
+                          "options": {
+                            "(google.api.field_behavior)": "OUTPUT_ONLY"
+                          }
+                        }
+                      },
+                      "nested": {
+                        "DocumentMetadata": {
+                          "fields": {
+                            "uri": {
+                              "type": "string",
+                              "id": 1
+                            },
+                            "title": {
+                              "type": "string",
+                              "id": 2
+                            },
+                            "structData": {
+                              "type": "google.protobuf.Struct",
+                              "id": 3
+                            }
+                          }
+                        },
+                        "PageSpan": {
+                          "fields": {
+                            "pageStart": {
+                              "type": "int32",
+                              "id": 1
+                            },
+                            "pageEnd": {
+                              "type": "int32",
+                              "id": 2
+                            }
+                          }
+                        },
+                        "ChunkMetadata": {
+                          "fields": {
+                            "previousChunks": {
+                              "rule": "repeated",
+                              "type": "Chunk",
+                              "id": 1
+                            },
+                            "nextChunks": {
+                              "rule": "repeated",
+                              "type": "Chunk",
+                              "id": 2
+                            }
                           }
                         }
                       }
@@ -549,6 +655,50 @@
                         }
                       }
                     },
+                    "CompletionSuggestion": {
+                      "oneofs": {
+                        "rankingInfo": {
+                          "oneof": [
+                            "globalScore",
+                            "frequency"
+                          ]
+                        }
+                      },
+                      "fields": {
+                        "globalScore": {
+                          "type": "double",
+                          "id": 2
+                        },
+                        "frequency": {
+                          "type": "int64",
+                          "id": 3
+                        },
+                        "suggestion": {
+                          "type": "string",
+                          "id": 1,
+                          "options": {
+                            "(google.api.field_behavior)": "REQUIRED"
+                          }
+                        },
+                        "languageCode": {
+                          "type": "string",
+                          "id": 4
+                        },
+                        "groupId": {
+                          "type": "string",
+                          "id": 5
+                        },
+                        "groupScore": {
+                          "type": "double",
+                          "id": 6
+                        },
+                        "alternativePhrases": {
+                          "rule": "repeated",
+                          "type": "string",
+                          "id": 7
+                        }
+                      }
+                    },
                     "CompletionService": {
                       "options": {
                         "(google.api.default_host)": "discoveryengine.googleapis.com",
@@ -632,6 +782,66 @@
                               }
                             }
                           ]
+                        },
+                        "ImportCompletionSuggestions": {
+                          "requestType": "ImportCompletionSuggestionsRequest",
+                          "responseType": "google.longrunning.Operation",
+                          "options": {
+                            "(google.api.http).post": "/v1/{parent=projects/*/locations/*/collections/*/dataStores/*}/completionSuggestions:import",
+                            "(google.api.http).body": "*",
+                            "(google.api.http).additional_bindings.post": "/v1/{parent=projects/*/locations/*/dataStores/*}/completionSuggestions:import",
+                            "(google.api.http).additional_bindings.body": "*",
+                            "(google.longrunning.operation_info).response_type": "google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse",
+                            "(google.longrunning.operation_info).metadata_type": "google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata"
+                          },
+                          "parsedOptions": [
+                            {
+                              "(google.api.http)": {
+                                "post": "/v1/{parent=projects/*/locations/*/collections/*/dataStores/*}/completionSuggestions:import",
+                                "body": "*",
+                                "additional_bindings": {
+                                  "post": "/v1/{parent=projects/*/locations/*/dataStores/*}/completionSuggestions:import",
+                                  "body": "*"
+                                }
+                              }
+                            },
+                            {
+                              "(google.longrunning.operation_info)": {
+                                "response_type": "google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse",
+                                "metadata_type": "google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata"
+                              }
+                            }
+                          ]
+                        },
+                        "PurgeCompletionSuggestions": {
+                          "requestType": "PurgeCompletionSuggestionsRequest",
+                          "responseType": "google.longrunning.Operation",
+                          "options": {
+                            "(google.api.http).post": "/v1/{parent=projects/*/locations/*/collections/*/dataStores/*}/completionSuggestions:purge",
+                            "(google.api.http).body": "*",
+                            "(google.api.http).additional_bindings.post": "/v1/{parent=projects/*/locations/*/dataStores/*}/completionSuggestions:purge",
+                            "(google.api.http).additional_bindings.body": "*",
+                            "(google.longrunning.operation_info).response_type": "google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse",
+                            "(google.longrunning.operation_info).metadata_type": "google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata"
+                          },
+                          "parsedOptions": [
+                            {
+                              "(google.api.http)": {
+                                "post": "/v1/{parent=projects/*/locations/*/collections/*/dataStores/*}/completionSuggestions:purge",
+                                "body": "*",
+                                "additional_bindings": {
+                                  "post": "/v1/{parent=projects/*/locations/*/dataStores/*}/completionSuggestions:purge",
+                                  "body": "*"
+                                }
+                              }
+                            },
+                            {
+                              "(google.longrunning.operation_info)": {
+                                "response_type": "google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse",
+                                "metadata_type": "google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata"
+                              }
+                            }
+                          ]
                         }
                       }
                     },
@@ -944,6 +1154,46 @@
                         }
                       }
                     },
+                    "AlloyDbSource": {
+                      "fields": {
+                        "projectId": {
+                          "type": "string",
+                          "id": 1
+                        },
+                        "locationId": {
+                          "type": "string",
+                          "id": 2,
+                          "options": {
+                            "(google.api.field_behavior)": "REQUIRED"
+                          }
+                        },
+                        "clusterId": {
+                          "type": "string",
+                          "id": 3,
+                          "options": {
+                            "(google.api.field_behavior)": "REQUIRED"
+                          }
+                        },
+                        "databaseId": {
+                          "type": "string",
+                          "id": 4,
+                          "options": {
+                            "(google.api.field_behavior)": "REQUIRED"
+                          }
+                        },
+                        "tableId": {
+                          "type": "string",
+                          "id": 5,
+                          "options": {
+                            "(google.api.field_behavior)": "REQUIRED"
+                          }
+                        },
+                        "gcsStagingDir": {
+                          "type": "string",
+                          "id": 6
+                        }
+                      }
+                    },
                     "FirestoreSource": {
                       "fields": {
                         "projectId": {
@@ -1112,6 +1362,7 @@
                             "spannerSource",
                             "cloudSqlSource",
                             "firestoreSource",
+                            "alloyDbSource",
                             "bigtableSource"
                           ]
                         }
@@ -1145,6 +1396,10 @@
                           "type": "FirestoreSource",
                           "id": 13
                         },
+                        "alloyDbSource": {
+                          "type": "AlloyDbSource",
+                          "id": 14
+                        },
                         "bigtableSource": {
                           "type": "BigtableSource",
                           "id": 15
@@ -1284,6 +1539,90 @@
                         }
                       }
                     },
+                    "ImportCompletionSuggestionsRequest": {
+                      "oneofs": {
+                        "source": {
+                          "oneof": [
+                            "inlineSource",
+                            "gcsSource",
+                            "bigquerySource"
+                          ]
+                        }
+                      },
+                      "fields": {
+                        "inlineSource": {
+                          "type": "InlineSource",
+                          "id": 2
+                        },
+                        "gcsSource": {
+                          "type": "GcsSource",
+                          "id": 3
+                        },
+                        "bigquerySource": {
+                          "type": "BigQuerySource",
+                          "id": 4
+                        },
+                        "parent": {
+                          "type": "string",
+                          "id": 1,
+                          "options": {
+                            "(google.api.field_behavior)": "REQUIRED",
+                            "(google.api.resource_reference).type": "discoveryengine.googleapis.com/DataStore"
+                          }
+                        },
+                        "errorConfig": {
+                          "type": "ImportErrorConfig",
+                          "id": 5
+                        }
+                      },
+                      "nested": {
+                        "InlineSource": {
+                          "fields": {
+                            "suggestions": {
+                              "rule": "repeated",
+                              "type": "CompletionSuggestion",
+                              "id": 1,
+                              "options": {
+                                "(google.api.field_behavior)": "REQUIRED"
+                              }
+                            }
+                          }
+                        }
+                      }
+                    },
+                    "ImportCompletionSuggestionsResponse": {
+                      "fields": {
+                        "errorSamples": {
+                          "rule": "repeated",
+                          "type": "google.rpc.Status",
+                          "id": 1
+                        },
+                        "errorConfig": {
+                          "type": "ImportErrorConfig",
+                          "id": 2
+                        }
+                      }
+                    },
+                    "ImportCompletionSuggestionsMetadata": {
+                      "fields": {
+                        "createTime": {
+                          "type": "google.protobuf.Timestamp",
+                          "id": 1
+                        },
+                        "updateTime": {
+                          "type": "google.protobuf.Timestamp",
+                          "id": 2
+                        },
+                        "successCount": {
+                          "type": "int64",
+                          "id": 3
+                        },
+                        "failureCount": {
+                          "type": "int64",
+                          "id": 4
+                        }
+                      }
+                    },
                     "Document": {
                       "options": {
                         "(google.api.resource).type": "discoveryengine.googleapis.com/Document",
@@ -1806,6 +2145,43 @@
                         }
                       }
                     },
+                    "PurgeCompletionSuggestionsRequest": {
+                      "fields": {
+                        "parent": {
+                          "type": "string",
+                          "id": 1,
+                          "options": {
+                            "(google.api.field_behavior)": "REQUIRED",
+                            "(google.api.resource_reference).type": "discoveryengine.googleapis.com/DataStore"
+                          }
+                        }
+                      }
+                    },
+                    "PurgeCompletionSuggestionsResponse": {
+                      "fields": {
+                        "purgeSucceeded": {
+                          "type": "bool",
+                          "id": 1
+                        },
+                        "errorSamples": {
+                          "rule": "repeated",
+                          "type": "google.rpc.Status",
+                          "id": 2
+                        }
+                      }
+                    },
+                    "PurgeCompletionSuggestionsMetadata": {
+                      "fields": {
+                        "createTime": {
+                          "type": "google.protobuf.Timestamp",
+                          "id": 1
+                        },
+                        "updateTime": {
+                          "type": "google.protobuf.Timestamp",
+                          "id": 2
+                        }
+                      }
+                    },
                     "Condition": {
                       "fields": {
                         "queryTerms": {
@@ -2458,6 +2834,10 @@
                           "type": "UserInfo",
                           "id": 21
                         },
+                        "languageCode": {
+                          "type": "string",
+                          "id": 35
+                        },
                         "facetSpecs": {
                           "rule": "repeated",
                           "type": "FacetSpec",
@@ -2496,6 +2876,21 @@
                           "keyType": "string",
                           "type": "string",
                           "id": 22
+                        },
+                        "searchAsYouTypeSpec": {
+                          "type": "SearchAsYouTypeSpec",
+                          "id": 31
+                        },
+                        "session": {
+                          "type": "string",
+                          "id": 41,
+                          "options": {
+                            "(google.api.resource_reference).type": "discoveryengine.googleapis.com/Session"
+                          }
+                        },
+                        "sessionSpec": {
+                          "type": "SessionSpec",
+                          "id": 42
                         }
                       },
                       "nested": {
@@ -2665,6 +3060,14 @@
                             "extractiveContentSpec": {
                               "type": "ExtractiveContentSpec",
                               "id": 3
+                            },
+                            "searchResultMode": {
+                              "type": "SearchResultMode",
+                              "id": 4
+                            },
+                            "chunkSpec": {
+                              "type": "ChunkSpec",
+                              "id": 5
                             }
                           },
                           "nested": {
@@ -2767,6 +3170,64 @@
                                   "id": 5
                                 }
                               }
+                            },
+                            "ChunkSpec": {
+                              "fields": {
+                                "numPreviousChunks": {
+                                  "type": "int32",
+                                  "id": 1
+                                },
+                                "numNextChunks": {
+                                  "type": "int32",
+                                  "id": 2
+                                }
+                              }
+                            },
+                            "SearchResultMode": {
+                              "values": {
+                                "SEARCH_RESULT_MODE_UNSPECIFIED": 0,
+                                "DOCUMENTS": 1,
+                                "CHUNKS": 2
+                              }
+                            }
+                          }
+                        },
+                        "SearchAsYouTypeSpec": {
+                          "fields": {
+                            "condition": {
+                              "type": "Condition",
+                              "id": 1
+                            }
+                          },
+                          "nested": {
+                            "Condition": {
+                              "values": {
+                                "CONDITION_UNSPECIFIED": 0,
+                                "DISABLED": 1,
+                                "ENABLED": 2
+                              }
+                            }
+                          }
+                        },
+                        "SessionSpec": {
+                          "oneofs": {
+                            "_searchResultPersistenceCount": {
+                              "oneof": [
+                                "searchResultPersistenceCount"
+                              ]
+                            }
+                          },
+                          "fields": {
+                            "queryId": {
+                              "type": "string",
+                              "id": 1
+                            },
+                            "searchResultPersistenceCount": {
+                              "type": "int32",
+                              "id": 2,
+                              "options": {
+                                "proto3_optional": true
+                              }
                             }
                           }
                         }
@@ -2811,6 +3272,10 @@
                         "queryExpansionInfo": {
                           "type": "QueryExpansionInfo",
                           "id": 14
+                        },
+                        "sessionInfo": {
+                          "type": "SessionInfo",
+                          "id": 19
                         }
                       },
                       "nested": {
@@ -2823,6 +3288,10 @@
                             "document": {
                               "type": "Document",
                               "id": 2
+                            },
+                            "chunk": {
+                              "type": "Chunk",
+                              "id": 18
                             }
                           }
                         },
@@ -3017,6 +3486,18 @@
                               "id": 2
                             }
                           }
+                        },
+                        "SessionInfo": {
+                          "fields": {
+                            "name": {
+                              "type": "string",
+                              "id": 1
+                            },
+                            "queryId": {
+                              "type": "string",
+                              "id": 2
+                            }
+                          }
                         }
                       }
                     },
@@ -3623,6 +4104,11 @@
                         "userPseudoId": {
                           "type": "string",
                           "id": 12
+                        },
+                        "userLabels": {
+                          "keyType": "string",
+                          "type": "string",
+                          "id": 13
                         }
                       },
                       "nested": {
@@ -3740,6 +4226,10 @@
                                   "type": "string",
                                   "id": 4
                                 },
+                                "searchResultMode": {
+                                  "type": "SearchRequest.ContentSearchSpec.SearchResultMode",
+                                  "id": 5
+                                },
                                 "dataStoreSpecs": {
                                   "rule": "repeated",
                                   "type": "SearchRequest.DataStoreSpec",
@@ -3904,6 +4394,10 @@
                                 "disable": {
                                   "type": "bool",
                                   "id": 1
+                                },
+                                "maxRephraseSteps": {
+                                  "type": "int32",
+                                  "id": 2
                                 }
                               }
                             }
@@ -4205,6 +4699,10 @@
                           "type": "string",
                           "id": 1
                         },
+                        "chunkingConfig": {
+                          "type": "ChunkingConfig",
+                          "id": 3
+                        },
                         "defaultParsingConfig": {
                           "type": "ParsingConfig",
                           "id": 4
@@ -4216,12 +4714,42 @@
                         }
                       },
                       "nested": {
+                        "ChunkingConfig": {
+                          "oneofs": {
+                            "chunkMode": {
+                              "oneof": [
+                                "layoutBasedChunkingConfig"
+                              ]
+                            }
+                          },
+                          "fields": {
+                            "layoutBasedChunkingConfig": {
+                              "type": "LayoutBasedChunkingConfig",
+                              "id": 1
+                            }
+                          },
+                          "nested": {
+                            "LayoutBasedChunkingConfig": {
+                              "fields": {
+                                "chunkSize": {
+                                  "type": "int32",
+                                  "id": 1
+                                },
+                                "includeAncestorHeadings": {
+                                  "type": "bool",
+                                  "id": 2
+                                }
+                              }
+                            }
+                          }
+                        },
                         "ParsingConfig": {
                           "oneofs": {
                             "typeDedicatedConfig": {
                               "oneof": [
                                 "digitalParsingConfig",
-                                "ocrParsingConfig"
+                                "ocrParsingConfig",
+                                "layoutParsingConfig"
                               ]
                             }
                           },
@@ -4233,6 +4761,10 @@
                             "ocrParsingConfig": {
                               "type": "OcrParsingConfig",
                               "id": 2
+                            },
+                            "layoutParsingConfig": {
+                              "type": "LayoutParsingConfig",
+                              "id": 3
                             }
                           },
                           "nested": {
@@ -4254,6 +4786,9 @@
                                   "id": 2
                                 }
                               }
+                            },
+                            "LayoutParsingConfig": {
+                              "fields": {}
                             }
                           }
                         }
@@ -6996,15 +7531,20 @@
                           "responseType": "google.api.HttpBody",
                           "options": {
                             "(google.api.http).get": "/v1/{parent=projects/*/locations/*/dataStores/*}/userEvents:collect",
-                            "(google.api.http).additional_bindings.get": "/v1/{parent=projects/*/locations/*/collections/*/dataStores/*}/userEvents:collect"
+                            "(google.api.http).additional_bindings.get": "/v1/{parent=projects/*/locations/*}/userEvents:collect"
                           },
                           "parsedOptions": [
                             {
                               "(google.api.http)": {
                                 "get": "/v1/{parent=projects/*/locations/*/dataStores/*}/userEvents:collect",
-                                "additional_bindings": {
-                                  "get": "/v1/{parent=projects/*/locations/*/collections/*/dataStores/*}/userEvents:collect"
-                                }
+                                "additional_bindings": [
+                                  {
+                                    "get": "/v1/{parent=projects/*/locations/*/collections/*/dataStores/*}/userEvents:collect"
+                                  },
+                                  {
+                                    "get": "/v1/{parent=projects/*/locations/*}/userEvents:collect"
+                                  }
+                                ]
                               }
                             }
                           ]
diff --git a/packages/google-cloud-discoveryengine/samples/README.md b/packages/google-cloud-discoveryengine/samples/README.md
index 49ead2abaaf..e1216d96c31 100644
--- a/packages/google-cloud-discoveryengine/samples/README.md
+++ b/packages/google-cloud-discoveryengine/samples/README.md
@@ -13,7 +13,9 @@
 * [Before you begin](#before-you-begin)
 * [Samples](#samples)
   * [Completion_service.complete_query](#completion_service.complete_query)
+  * [Completion_service.import_completion_suggestions](#completion_service.import_completion_suggestions)
   * [Completion_service.import_suggestion_deny_list_entries](#completion_service.import_suggestion_deny_list_entries)
+  * [Completion_service.purge_completion_suggestions](#completion_service.purge_completion_suggestions)
   * [Completion_service.purge_suggestion_deny_list_entries](#completion_service.purge_suggestion_deny_list_entries)
   * [Control_service.create_control](#control_service.create_control)
   * [Control_service.delete_control](#control_service.delete_control)
@@ -262,6 +264,23 @@ __Usage:__
 
 
 
+### Completion_service.import_completion_suggestions
+
+View the [source code](https://github.com/googleapis/google-cloud-node/blob/main/packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.import_completion_suggestions.js).
+
+[![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/google-cloud-node&page=editor&open_in_editor=packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.import_completion_suggestions.js,samples/README.md)
+
+__Usage:__
+
+
+`node packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.import_completion_suggestions.js`
+
+
+-----
+
+
+
+
 ### Completion_service.import_suggestion_deny_list_entries
 
 View the [source code](https://github.com/googleapis/google-cloud-node/blob/main/packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.import_suggestion_deny_list_entries.js).
@@ -279,6 +298,23 @@ __Usage:__
 
 
 
+### Completion_service.purge_completion_suggestions
+
+View the [source code](https://github.com/googleapis/google-cloud-node/blob/main/packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.purge_completion_suggestions.js).
+
+[![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/google-cloud-node&page=editor&open_in_editor=packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.purge_completion_suggestions.js,samples/README.md)
+
+__Usage:__
+
+
+`node packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.purge_completion_suggestions.js`
+
+
+-----
+
+
+
+
 ### Completion_service.purge_suggestion_deny_list_entries
 
 View the [source code](https://github.com/googleapis/google-cloud-node/blob/main/packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.purge_suggestion_deny_list_entries.js).
diff --git a/packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.import_completion_suggestions.js b/packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.import_completion_suggestions.js
new file mode 100644
index 00000000000..2eff78fc6ad
--- /dev/null
+++ b/packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.import_completion_suggestions.js
@@ -0,0 +1,80 @@
+// Copyright 2024 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// ** This file is automatically generated by gapic-generator-typescript. **
+// ** https://github.com/googleapis/gapic-generator-typescript **
+// ** All changes to this file may be overwritten. **
+
+
+
+'use strict';
+
+function main(parent) {
+  // [START discoveryengine_v1_generated_CompletionService_ImportCompletionSuggestions_async]
+  /**
+   * This snippet has been automatically generated and should be regarded as a code template only.
+   * It will require modifications to work.
+   * It may require correct/in-range values for request initialization.
+   * TODO(developer): Uncomment these variables before running the sample.
+   */
+  /**
+   *  The Inline source for suggestion entries.
+   */
+  // const inlineSource = {}
+  /**
+   *  Cloud Storage location for the input content.
+   */
+  // const gcsSource = {}
+  /**
+   *  BigQuery input source.
+   */
+  // const bigquerySource = {}
+  /**
+   *  Required. The parent data store resource name for which to import customer
+   *  autocomplete suggestions.
+   *  Follows pattern `projects/* /locations/* /collections/* /dataStores/*`
+   */
+  // const parent = 'abc123'
+  /**
+   *  The desired location of errors incurred during the Import.
+   */
+  // const errorConfig = {}
+
+  // Imports the Discoveryengine library
+  const {CompletionServiceClient} = require('@google-cloud/discoveryengine').v1;
+
+  // Instantiates a client
+  const discoveryengineClient = new CompletionServiceClient();
+
+  async function callImportCompletionSuggestions() {
+    // Construct request
+    const request = {
+      parent,
+    };
+
+    // Run request
+    const [operation] = await discoveryengineClient.importCompletionSuggestions(request);
+    const [response] = await operation.promise();
+    console.log(response);
+  }
+
+  callImportCompletionSuggestions();
+  // [END discoveryengine_v1_generated_CompletionService_ImportCompletionSuggestions_async]
+}
+
+process.on('unhandledRejection', err => {
+  console.error(err.message);
+  process.exitCode = 1;
+});
+main(...process.argv.slice(2));
diff --git a/packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.purge_completion_suggestions.js b/packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.purge_completion_suggestions.js
new file mode 100644
index 00000000000..ceda06f3d13
--- /dev/null
+++ b/packages/google-cloud-discoveryengine/samples/generated/v1/completion_service.purge_completion_suggestions.js
@@ -0,0 +1,64 @@
+// Copyright 2024 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// ** This file is automatically generated by gapic-generator-typescript. **
+// ** https://github.com/googleapis/gapic-generator-typescript **
+// ** All changes to this file may be overwritten. **
+
+
+
+'use strict';
+
+function main(parent) {
+  // [START discoveryengine_v1_generated_CompletionService_PurgeCompletionSuggestions_async]
+  /**
+   * This snippet has been automatically generated and should be regarded as a code template only.
+   * It will require modifications to work.
+   * It may require correct/in-range values for request initialization.
+   * TODO(developer): Uncomment these variables before running the sample.
+   */
+  /**
+   *  Required. The parent data store resource name for which to purge completion
+   *  suggestions. Follows pattern
+   *  projects/* /locations/* /collections/* /dataStores/*.
+   */
+  // const parent = 'abc123'
+
+  // Imports the Discoveryengine library
+  const {CompletionServiceClient} = require('@google-cloud/discoveryengine').v1;
+
+  // Instantiates a client
+  const discoveryengineClient = new CompletionServiceClient();
+
+  async function callPurgeCompletionSuggestions() {
+    // Construct request
+    const request = {
+      parent,
+    };
+
+    // Run request
+    const [operation] = await discoveryengineClient.purgeCompletionSuggestions(request);
+    const [response] = await operation.promise();
+    console.log(response);
+  }
+
+  callPurgeCompletionSuggestions();
+  // [END discoveryengine_v1_generated_CompletionService_PurgeCompletionSuggestions_async]
+}
+
+process.on('unhandledRejection', err => {
+  console.error(err.message);
+  process.exitCode = 1;
+});
+main(...process.argv.slice(2));
diff --git a/packages/google-cloud-discoveryengine/samples/generated/v1/conversational_search_service.answer_query.js b/packages/google-cloud-discoveryengine/samples/generated/v1/conversational_search_service.answer_query.js
index 0d11e2895af..8e012f51964 100644
--- a/packages/google-cloud-discoveryengine/samples/generated/v1/conversational_search_service.answer_query.js
+++ b/packages/google-cloud-discoveryengine/samples/generated/v1/conversational_search_service.answer_query.js
@@ -89,6 +89,24 @@ function main(servingConfig, query) {
    *  characters. Otherwise, an  `INVALID_ARGUMENT`  error is returned.
    */
   // const userPseudoId = 'abc123'
+  /**
+   *  The user labels applied to a resource must meet the following requirements:
+   *  * Each resource can have multiple labels, up to a maximum of 64.
+   *  * Each label must be a key-value pair.
+   *  * Keys have a minimum length of 1 character and a maximum length of 63
+   *    characters and cannot be empty. Values can be empty and have a maximum
+   *    length of 63 characters.
+   *  * Keys and values can contain only lowercase letters, numeric characters,
+   *    underscores, and dashes. All characters must use UTF-8 encoding, and
+   *    international characters are allowed.
+   *  * The key portion of a label must be unique. However, you can use the same
+   *    key with multiple resources.
+   *  * Keys must start with a lowercase letter or international character.
+   *  See Google Cloud
+   *  Document (https://cloud.google.com/resource-manager/docs/creating-managing-labels#requirements)
+   *  for more details.
+   */
+  // const userLabels = [1,2,3,4]
 
   // Imports the Discoveryengine library
   const {ConversationalSearchServiceClient} = require('@google-cloud/discoveryengine').v1;
diff --git a/packages/google-cloud-discoveryengine/samples/generated/v1/document_service.import_documents.js b/packages/google-cloud-discoveryengine/samples/generated/v1/document_service.import_documents.js
index 64da7e2fb30..147af563360 100644
--- a/packages/google-cloud-discoveryengine/samples/generated/v1/document_service.import_documents.js
+++ b/packages/google-cloud-discoveryengine/samples/generated/v1/document_service.import_documents.js
@@ -56,6 +56,10 @@ function main(parent) {
    *  Firestore input source.
    */
   // const firestoreSource = {}
+  /**
+   *  AlloyDB input source.
+   */
+  // const alloyDbSource = {}
   /**
    *  Cloud Bigtable input source.
    */
diff --git a/packages/google-cloud-discoveryengine/samples/generated/v1/search_service.search.js b/packages/google-cloud-discoveryengine/samples/generated/v1/search_service.search.js
index 9d6c8cc744e..aca8ca4fd3f 100644
--- a/packages/google-cloud-discoveryengine/samples/generated/v1/search_service.search.js
+++ b/packages/google-cloud-discoveryengine/samples/generated/v1/search_service.search.js
@@ -134,6 +134,14 @@ function main(servingConfig) {
    *  is used to deduce `device_type` for analytics.
    */
   // const userInfo = {}
+  /**
+   *  The BCP-47 language code, such as "en-US" or "sr-Latn". For more
+   *  information, see Standard
+   *  fields (https://cloud.google.com/apis/design/standard_fields). This field
+   *  helps to better interpret the query. If a value isn't specified, the query
+   *  language code is automatically detected, which may not be accurate.
+   */
+  // const languageCode = 'abc123'
   /**
    *  Facet specifications for faceted search. If empty, no facets are returned.
    *  A maximum of 100 values are allowed. Otherwise, an  `INVALID_ARGUMENT`
@@ -211,6 +219,41 @@ function main(servingConfig) {
    *  for more details.
    */
   // const userLabels = [1,2,3,4]
+  /**
+   *  Search as you type configuration. Only supported for the
+   *  IndustryVertical.MEDIA google.cloud.discoveryengine.v1.IndustryVertical.MEDIA 
+   *  vertical.
+   */
+  // const searchAsYouTypeSpec = {}
+  /**
+   *  The session resource name. Optional.
+   *  Session allows users to do multi-turn /search API calls or coordination
+   *  between /search API calls and /answer API calls.
+   *  Example #1 (multi-turn /search API calls):
+   *    1. Call /search API with the auto-session mode (see below).
+   *    2. Call /search API with the session ID generated in the first call.
+   *       Here, the previous search query gets considered in query
+   *       standing. I.e., if the first query is "How did Alphabet do in 2022?"
+   *       and the current query is "How about 2023?", the current query will
+   *       be interpreted as "How did Alphabet do in 2023?".
+   *  Example #2 (coordination between /search API calls and /answer API calls):
+   *    1. Call /search API with the auto-session mode (see below).
+   *    2. Call /answer API with the session ID generated in the first call.
+   *       Here, the answer generation happens in the context of the search
+   *       results from the first search call.
+   *  Auto-session mode: when `projects/.../sessions/-` is used, a new session
+   *  gets automatically created. Otherwise, users can use the create-session API
+   *  to create a session manually.
+   *  Multi-turn Search feature is currently at private GA stage. Please use
+   *  v1alpha or v1beta version instead before we launch this feature to public
+   *  GA. Or ask for allowlisting through Google Support team.
+   */
+  // const session = 'abc123'
+  /**
+   *  Session specification.
+   *  Can be used only when `session` is set.
+   */
+  // const sessionSpec = {}
 
   // Imports the Discoveryengine library
   const {SearchServiceClient} = require('@google-cloud/discoveryengine').v1;
diff --git a/packages/google-cloud-discoveryengine/samples/generated/v1/snippet_metadata_google.cloud.discoveryengine.v1.json b/packages/google-cloud-discoveryengine/samples/generated/v1/snippet_metadata_google.cloud.discoveryengine.v1.json
index c44b54c6973..c400d997ecc 100644
--- a/packages/google-cloud-discoveryengine/samples/generated/v1/snippet_metadata_google.cloud.discoveryengine.v1.json
+++ b/packages/google-cloud-discoveryengine/samples/generated/v1/snippet_metadata_google.cloud.discoveryengine.v1.json
@@ -155,6 +155,102 @@
                 }
             }
         },
+        {
+            "regionTag": "discoveryengine_v1_generated_CompletionService_ImportCompletionSuggestions_async",
+            "title": "CompletionService importCompletionSuggestions Sample",
+            "origin": "API_DEFINITION",
+            "description": " Imports [CompletionSuggestion][google.cloud.discoveryengine.v1.CompletionSuggestion]s for a DataStore.",
+            "canonical": true,
+            "file": "completion_service.import_completion_suggestions.js",
+            "language": "JAVASCRIPT",
+            "segments": [
+                {
+                    "start": 25,
+                    "end": 72,
+                    "type": "FULL"
+                }
+            ],
+            "clientMethod": {
+                "shortName": "ImportCompletionSuggestions",
+                "fullName": "google.cloud.discoveryengine.v1.CompletionService.ImportCompletionSuggestions",
+                "async": true,
+                "parameters": [
+                    {
+                        "name": "inline_source",
+                        "type": ".google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource"
+                    },
+                    {
+                        "name": "gcs_source",
+                        "type": ".google.cloud.discoveryengine.v1.GcsSource"
+                    },
+                    {
+                        "name": "bigquery_source",
+                        "type": ".google.cloud.discoveryengine.v1.BigQuerySource"
+                    },
+                    {
+                        "name": "parent",
+                        "type": "TYPE_STRING"
+                    },
+                    {
+                        "name": "error_config",
+                        "type": ".google.cloud.discoveryengine.v1.ImportErrorConfig"
+                    }
+                ],
+                "resultType": ".google.longrunning.Operation",
+                "client": {
+                    "shortName": "CompletionServiceClient",
+                    "fullName": "google.cloud.discoveryengine.v1.CompletionServiceClient"
+                },
+                "method": {
+                    "shortName": "ImportCompletionSuggestions",
+                    "fullName": "google.cloud.discoveryengine.v1.CompletionService.ImportCompletionSuggestions",
+                    "service": {
+                        "shortName": "CompletionService",
+                        "fullName": "google.cloud.discoveryengine.v1.CompletionService"
+                    }
+                }
+            }
+        },
+        {
+            "regionTag": "discoveryengine_v1_generated_CompletionService_PurgeCompletionSuggestions_async",
+            "title": "CompletionService purgeCompletionSuggestions Sample",
+            "origin": "API_DEFINITION",
+            "description": " Permanently deletes all [CompletionSuggestion][google.cloud.discoveryengine.v1.CompletionSuggestion]s for a DataStore.",
+            "canonical": true,
+            "file": "completion_service.purge_completion_suggestions.js",
+            "language": "JAVASCRIPT",
+            "segments": [
+                {
+                    "start": 25,
+                    "end": 56,
+                    "type": "FULL"
+                }
+            ],
+            "clientMethod": {
+                "shortName": "PurgeCompletionSuggestions",
+                "fullName": "google.cloud.discoveryengine.v1.CompletionService.PurgeCompletionSuggestions",
+                "async": true,
+                "parameters": [
+                    {
+                        "name": "parent",
+                        "type": "TYPE_STRING"
+                    }
+                ],
+                "resultType": ".google.longrunning.Operation",
+                "client": {
+                    "shortName": "CompletionServiceClient",
+                    "fullName": "google.cloud.discoveryengine.v1.CompletionServiceClient"
+                },
+                "method": {
+                    "shortName": "PurgeCompletionSuggestions",
+                    "fullName": "google.cloud.discoveryengine.v1.CompletionService.PurgeCompletionSuggestions",
+                    "service": {
+                        "shortName": "CompletionService",
+                        "fullName": "google.cloud.discoveryengine.v1.CompletionService"
+                    }
+                }
+            }
+        },
         {
             "regionTag": "discoveryengine_v1_generated_ControlService_CreateControl_async",
             "title": "CompletionService createControl Sample",
@@ -686,7 +782,7 @@
             "segments": [
                 {
                     "start": 25,
-                    "end": 111,
+                    "end": 129,
                     "type": "FULL"
                 }
             ],
@@ -734,6 +830,10 @@
                     {
                         "name": "user_pseudo_id",
                         "type": "TYPE_STRING"
+                    },
+                    {
+                        "name": "user_labels",
+                        "type": "TYPE_MESSAGE[]"
                     }
                 ],
                 "resultType": ".google.cloud.discoveryengine.v1.AnswerQueryResponse",
@@ -1478,7 +1578,7 @@
             "segments": [
                 {
                     "start": 25,
-                    "end": 159,
+                    "end": 163,
                     "type": "FULL"
                 }
             ],
@@ -1515,6 +1615,10 @@
                         "name": "firestore_source",
                         "type": ".google.cloud.discoveryengine.v1.FirestoreSource"
                     },
+                    {
+                        "name": "alloy_db_source",
+                        "type": ".google.cloud.discoveryengine.v1.AlloyDbSource"
+                    },
                     {
                         "name": "bigtable_source",
                         "type": ".google.cloud.discoveryengine.v1.BigtableSource"
@@ -2294,7 +2398,7 @@
             "segments": [
                 {
                     "start": 25,
-                    "end": 234,
+                    "end": 277,
                     "type": "FULL"
                 }
             ],
@@ -2351,6 +2455,10 @@
                         "name": "user_info",
                         "type": ".google.cloud.discoveryengine.v1.UserInfo"
                     },
+                    {
+                        "name": "language_code",
+                        "type": "TYPE_STRING"
+                    },
                     {
                         "name": "facet_specs",
                         "type": "TYPE_MESSAGE[]"
@@ -2386,6 +2494,18 @@
                     {
                         "name": "user_labels",
                         "type": "TYPE_MESSAGE[]"
+                    },
+                    {
+                        "name": "search_as_you_type_spec",
+                        "type": ".google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec"
+                    },
+                    {
+                        "name": "session",
+                        "type": "TYPE_STRING"
+                    },
+                    {
+                        "name": "session_spec",
+                        "type": ".google.cloud.discoveryengine.v1.SearchRequest.SessionSpec"
                     }
                 ],
                 "resultType": ".google.cloud.discoveryengine.v1.SearchResponse",
diff --git a/packages/google-cloud-discoveryengine/src/v1/completion_service_client.ts b/packages/google-cloud-discoveryengine/src/v1/completion_service_client.ts
index 752cefca26f..a42ff11d4d4 100644
--- a/packages/google-cloud-discoveryengine/src/v1/completion_service_client.ts
+++ b/packages/google-cloud-discoveryengine/src/v1/completion_service_client.ts
@@ -221,6 +221,10 @@ export class CompletionServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationCollectionDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/controls/{control}'
@@ -276,6 +280,10 @@ export class CompletionServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/controls/{control}'
@@ -437,6 +445,18 @@ export class CompletionServiceClient {
     const purgeSuggestionDenyListEntriesMetadata = protoFilesRoot.lookup(
       '.google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata'
     ) as gax.protobuf.Type;
+    const importCompletionSuggestionsResponse = protoFilesRoot.lookup(
+      '.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse'
+    ) as gax.protobuf.Type;
+    const importCompletionSuggestionsMetadata = protoFilesRoot.lookup(
+      '.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata'
+    ) as gax.protobuf.Type;
+    const purgeCompletionSuggestionsResponse = protoFilesRoot.lookup(
+      '.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse'
+    ) as gax.protobuf.Type;
+    const purgeCompletionSuggestionsMetadata = protoFilesRoot.lookup(
+      '.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata'
+    ) as gax.protobuf.Type;
 
     this.descriptors.longrunning = {
       importSuggestionDenyListEntries:
@@ -458,6 +478,24 @@ export class CompletionServiceClient {
           purgeSuggestionDenyListEntriesMetadata
         )
       ),
+      importCompletionSuggestions: new this._gaxModule.LongrunningDescriptor(
+        this.operationsClient,
+        importCompletionSuggestionsResponse.decode.bind(
+          importCompletionSuggestionsResponse
+        ),
+        importCompletionSuggestionsMetadata.decode.bind(
+          importCompletionSuggestionsMetadata
+        )
+      ),
+      purgeCompletionSuggestions: new this._gaxModule.LongrunningDescriptor(
+        this.operationsClient,
+        purgeCompletionSuggestionsResponse.decode.bind(
+          purgeCompletionSuggestionsResponse
+        ),
+        purgeCompletionSuggestionsMetadata.decode.bind(
+          purgeCompletionSuggestionsMetadata
+        )
+      ),
     };
 
     // Put together the default options sent with requests.
@@ -514,6 +552,8 @@ export class CompletionServiceClient {
       'completeQuery',
       'importSuggestionDenyListEntries',
       'purgeSuggestionDenyListEntries',
+      'importCompletionSuggestions',
+      'purgeCompletionSuggestions',
     ];
     for (const methodName of completionServiceStubMethods) {
       const callPromise = this.completionServiceStub.then(
@@ -1059,6 +1099,303 @@ export class CompletionServiceClient {
       protos.google.cloud.discoveryengine.v1.PurgeSuggestionDenyListEntriesMetadata
     >;
   }
+  /**
+   * Imports
+   * {@link protos.google.cloud.discoveryengine.v1.CompletionSuggestion|CompletionSuggestion}s
+   * for a DataStore.
+   *
+   * @param {Object} request
+   *   The request object that will be sent.
+   * @param {google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest.InlineSource} request.inlineSource
+   *   The Inline source for suggestion entries.
+   * @param {google.cloud.discoveryengine.v1.GcsSource} request.gcsSource
+   *   Cloud Storage location for the input content.
+   * @param {google.cloud.discoveryengine.v1.BigQuerySource} request.bigquerySource
+   *   BigQuery input source.
+   * @param {string} request.parent
+   *   Required. The parent data store resource name for which to import customer
+   *   autocomplete suggestions.
+   *
+   *   Follows pattern `projects/* /locations/* /collections/* /dataStores/*`
+   * @param {google.cloud.discoveryengine.v1.ImportErrorConfig} request.errorConfig
+   *   The desired location of errors incurred during the Import.
+   * @param {object} [options]
+   *   Call options. See {@link https://googleapis.dev/nodejs/google-gax/latest/interfaces/CallOptions.html|CallOptions} for more details.
+   * @returns {Promise} - The promise which resolves to an array.
+   *   The first element of the array is an object representing
+   *   a long running operation. Its `promise()` method returns a promise
+   *   you can `await` for.
+   *   Please see the {@link https://github.com/googleapis/gax-nodejs/blob/master/client-libraries.md#long-running-operations | documentation }
+   *   for more details and examples.
+   * @example <caption>include:samples/generated/v1/completion_service.import_completion_suggestions.js</caption>
+   * region_tag:discoveryengine_v1_generated_CompletionService_ImportCompletionSuggestions_async
+   */
+  importCompletionSuggestions(
+    request?: protos.google.cloud.discoveryengine.v1.IImportCompletionSuggestionsRequest,
+    options?: CallOptions
+  ): Promise<
+    [
+      LROperation<
+        protos.google.cloud.discoveryengine.v1.IImportCompletionSuggestionsResponse,
+        protos.google.cloud.discoveryengine.v1.IImportCompletionSuggestionsMetadata
+      >,
+      protos.google.longrunning.IOperation | undefined,
+      {} | undefined,
+    ]
+  >;
+  importCompletionSuggestions(
+    request: protos.google.cloud.discoveryengine.v1.IImportCompletionSuggestionsRequest,
+    options: CallOptions,
+    callback: Callback<
+      LROperation<
+        protos.google.cloud.discoveryengine.v1.IImportCompletionSuggestionsResponse,
+        protos.google.cloud.discoveryengine.v1.IImportCompletionSuggestionsMetadata
+      >,
+      protos.google.longrunning.IOperation | null | undefined,
+      {} | null | undefined
+    >
+  ): void;
+  importCompletionSuggestions(
+    request: protos.google.cloud.discoveryengine.v1.IImportCompletionSuggestionsRequest,
+    callback: Callback<
+      LROperation<
+        protos.google.cloud.discoveryengine.v1.IImportCompletionSuggestionsResponse,
+        protos.google.cloud.discoveryengine.v1.IImportCompletionSuggestionsMetadata
+      >,
+      protos.google.longrunning.IOperation | null | undefined,
+      {} | null | undefined
+    >
+  ): void;
+  importCompletionSuggestions(
+    request?: protos.google.cloud.discoveryengine.v1.IImportCompletionSuggestionsRequest,
+    optionsOrCallback?:
+      | CallOptions
+      | Callback<
+          LROperation<
+            protos.google.cloud.discoveryengine.v1.IImportCompletionSuggestionsResponse,
+            protos.google.cloud.discoveryengine.v1.IImportCompletionSuggestionsMetadata
+          >,
+          protos.google.longrunning.IOperation | null | undefined,
+          {} | null | undefined
+        >,
+    callback?: Callback<
+      LROperation<
+        protos.google.cloud.discoveryengine.v1.IImportCompletionSuggestionsResponse,
+        protos.google.cloud.discoveryengine.v1.IImportCompletionSuggestionsMetadata
+      >,
+      protos.google.longrunning.IOperation | null | undefined,
+      {} | null | undefined
+    >
+  ): Promise<
+    [
+      LROperation<
+        protos.google.cloud.discoveryengine.v1.IImportCompletionSuggestionsResponse,
+        protos.google.cloud.discoveryengine.v1.IImportCompletionSuggestionsMetadata
+      >,
+      protos.google.longrunning.IOperation | undefined,
+      {} | undefined,
+    ]
+  > | void {
+    request = request || {};
+    let options: CallOptions;
+    if (typeof optionsOrCallback === 'function' && callback === undefined) {
+      callback = optionsOrCallback;
+      options = {};
+    } else {
+      options = optionsOrCallback as CallOptions;
+    }
+    options = options || {};
+    options.otherArgs = options.otherArgs || {};
+    options.otherArgs.headers = options.otherArgs.headers || {};
+    options.otherArgs.headers['x-goog-request-params'] =
+      this._gaxModule.routingHeader.fromParams({
+        parent: request.parent ?? '',
+      });
+    this.initialize();
+    return this.innerApiCalls.importCompletionSuggestions(
+      request,
+      options,
+      callback
+    );
+  }
+  /**
+   * Check the status of the long running operation returned by `importCompletionSuggestions()`.
+   * @param {String} name
+   *   The operation name that will be passed.
+   * @returns {Promise} - The promise which resolves to an object.
+   *   The decoded operation object has result and metadata field to get information from.
+   *   Please see the {@link https://github.com/googleapis/gax-nodejs/blob/master/client-libraries.md#long-running-operations | documentation }
+   *   for more details and examples.
+   * @example <caption>include:samples/generated/v1/completion_service.import_completion_suggestions.js</caption>
+   * region_tag:discoveryengine_v1_generated_CompletionService_ImportCompletionSuggestions_async
+   */
+  async checkImportCompletionSuggestionsProgress(
+    name: string
+  ): Promise<
+    LROperation<
+      protos.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse,
+      protos.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata
+    >
+  > {
+    const request =
+      new this._gaxModule.operationsProtos.google.longrunning.GetOperationRequest(
+        {name}
+      );
+    const [operation] = await this.operationsClient.getOperation(request);
+    const decodeOperation = new this._gaxModule.Operation(
+      operation,
+      this.descriptors.longrunning.importCompletionSuggestions,
+      this._gaxModule.createDefaultBackoffSettings()
+    );
+    return decodeOperation as LROperation<
+      protos.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsResponse,
+      protos.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsMetadata
+    >;
+  }
+  /**
+   * Permanently deletes all
+   * {@link protos.google.cloud.discoveryengine.v1.CompletionSuggestion|CompletionSuggestion}s
+   * for a DataStore.
+   *
+   * @param {Object} request
+   *   The request object that will be sent.
+   * @param {string} request.parent
+   *   Required. The parent data store resource name for which to purge completion
+   *   suggestions. Follows pattern
+   *   projects/* /locations/* /collections/* /dataStores/*.
+   * @param {object} [options]
+   *   Call options. See {@link https://googleapis.dev/nodejs/google-gax/latest/interfaces/CallOptions.html|CallOptions} for more details.
+   * @returns {Promise} - The promise which resolves to an array.
+   *   The first element of the array is an object representing
+   *   a long running operation. Its `promise()` method returns a promise
+   *   you can `await` for.
+   *   Please see the {@link https://github.com/googleapis/gax-nodejs/blob/master/client-libraries.md#long-running-operations | documentation }
+   *   for more details and examples.
+   * @example <caption>include:samples/generated/v1/completion_service.purge_completion_suggestions.js</caption>
+   * region_tag:discoveryengine_v1_generated_CompletionService_PurgeCompletionSuggestions_async
+   */
+  purgeCompletionSuggestions(
+    request?: protos.google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsRequest,
+    options?: CallOptions
+  ): Promise<
+    [
+      LROperation<
+        protos.google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsResponse,
+        protos.google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsMetadata
+      >,
+      protos.google.longrunning.IOperation | undefined,
+      {} | undefined,
+    ]
+  >;
+  purgeCompletionSuggestions(
+    request: protos.google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsRequest,
+    options: CallOptions,
+    callback: Callback<
+      LROperation<
+        protos.google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsResponse,
+        protos.google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsMetadata
+      >,
+      protos.google.longrunning.IOperation | null | undefined,
+      {} | null | undefined
+    >
+  ): void;
+  purgeCompletionSuggestions(
+    request: protos.google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsRequest,
+    callback: Callback<
+      LROperation<
+        protos.google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsResponse,
+        protos.google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsMetadata
+      >,
+      protos.google.longrunning.IOperation | null | undefined,
+      {} | null | undefined
+    >
+  ): void;
+  purgeCompletionSuggestions(
+    request?: protos.google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsRequest,
+    optionsOrCallback?:
+      | CallOptions
+      | Callback<
+          LROperation<
+            protos.google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsResponse,
+            protos.google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsMetadata
+          >,
+          protos.google.longrunning.IOperation | null | undefined,
+          {} | null | undefined
+        >,
+    callback?: Callback<
+      LROperation<
+        protos.google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsResponse,
+        protos.google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsMetadata
+      >,
+      protos.google.longrunning.IOperation | null | undefined,
+      {} | null | undefined
+    >
+  ): Promise<
+    [
+      LROperation<
+        protos.google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsResponse,
+        protos.google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsMetadata
+      >,
+      protos.google.longrunning.IOperation | undefined,
+      {} | undefined,
+    ]
+  > | void {
+    request = request || {};
+    let options: CallOptions;
+    if (typeof optionsOrCallback === 'function' && callback === undefined) {
+      callback = optionsOrCallback;
+      options = {};
+    } else {
+      options = optionsOrCallback as CallOptions;
+    }
+    options = options || {};
+    options.otherArgs = options.otherArgs || {};
+    options.otherArgs.headers = options.otherArgs.headers || {};
+    options.otherArgs.headers['x-goog-request-params'] =
+      this._gaxModule.routingHeader.fromParams({
+        parent: request.parent ?? '',
+      });
+    this.initialize();
+    return this.innerApiCalls.purgeCompletionSuggestions(
+      request,
+      options,
+      callback
+    );
+  }
+  /**
+   * Check the status of the long running operation returned by `purgeCompletionSuggestions()`.
+   * @param {String} name
+   *   The operation name that will be passed.
+   * @returns {Promise} - The promise which resolves to an object.
+   *   The decoded operation object has result and metadata field to get information from.
+   *   Please see the {@link https://github.com/googleapis/gax-nodejs/blob/master/client-libraries.md#long-running-operations | documentation }
+   *   for more details and examples.
+   * @example <caption>include:samples/generated/v1/completion_service.purge_completion_suggestions.js</caption>
+   * region_tag:discoveryengine_v1_generated_CompletionService_PurgeCompletionSuggestions_async
+   */
+  async checkPurgeCompletionSuggestionsProgress(
+    name: string
+  ): Promise<
+    LROperation<
+      protos.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse,
+      protos.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata
+    >
+  > {
+    const request =
+      new this._gaxModule.operationsProtos.google.longrunning.GetOperationRequest(
+        {name}
+      );
+    const [operation] = await this.operationsClient.getOperation(request);
+    const decodeOperation = new this._gaxModule.Operation(
+      operation,
+      this.descriptors.longrunning.purgeCompletionSuggestions,
+      this._gaxModule.createDefaultBackoffSettings()
+    );
+    return decodeOperation as LROperation<
+      protos.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsResponse,
+      protos.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsMetadata
+    >;
+  }
   /**
    * Gets information about a location.
    *
@@ -1612,6 +1949,145 @@ export class CompletionServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationCollectionDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} collection
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationCollectionDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    collection: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        collection: collection,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the collection from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the collection.
+   */
+  matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).collection;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationCollectionDataStoreControl resource name string.
    *
@@ -3016,6 +3492,127 @@ export class CompletionServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationDataStoreControl resource name string.
    *
diff --git a/packages/google-cloud-discoveryengine/src/v1/completion_service_client_config.json b/packages/google-cloud-discoveryengine/src/v1/completion_service_client_config.json
index 2136f588531..b48335cdf73 100644
--- a/packages/google-cloud-discoveryengine/src/v1/completion_service_client_config.json
+++ b/packages/google-cloud-discoveryengine/src/v1/completion_service_client_config.json
@@ -46,6 +46,16 @@
           "timeout_millis": 5000,
           "retry_codes_name": "unavailable",
           "retry_params_name": "319f27672a8be83550d842a373549dd84649a57e"
+        },
+        "ImportCompletionSuggestions": {
+          "timeout_millis": 5000,
+          "retry_codes_name": "unavailable",
+          "retry_params_name": "319f27672a8be83550d842a373549dd84649a57e"
+        },
+        "PurgeCompletionSuggestions": {
+          "timeout_millis": 5000,
+          "retry_codes_name": "unavailable",
+          "retry_params_name": "319f27672a8be83550d842a373549dd84649a57e"
         }
       }
     }
diff --git a/packages/google-cloud-discoveryengine/src/v1/completion_service_proto_list.json b/packages/google-cloud-discoveryengine/src/v1/completion_service_proto_list.json
index 9deb6123f5a..1da503d8002 100644
--- a/packages/google-cloud-discoveryengine/src/v1/completion_service_proto_list.json
+++ b/packages/google-cloud-discoveryengine/src/v1/completion_service_proto_list.json
@@ -1,5 +1,6 @@
 [
   "../../protos/google/cloud/discoveryengine/v1/answer.proto",
+  "../../protos/google/cloud/discoveryengine/v1/chunk.proto",
   "../../protos/google/cloud/discoveryengine/v1/common.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion_service.proto",
diff --git a/packages/google-cloud-discoveryengine/src/v1/control_service_client.ts b/packages/google-cloud-discoveryengine/src/v1/control_service_client.ts
index 68f6752f238..b615bfaaa19 100644
--- a/packages/google-cloud-discoveryengine/src/v1/control_service_client.ts
+++ b/packages/google-cloud-discoveryengine/src/v1/control_service_client.ts
@@ -226,6 +226,10 @@ export class ControlServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationCollectionDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/controls/{control}'
@@ -281,6 +285,10 @@ export class ControlServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/controls/{control}'
@@ -1524,6 +1532,145 @@ export class ControlServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationCollectionDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} collection
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationCollectionDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    collection: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        collection: collection,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the collection from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the collection.
+   */
+  matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).collection;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationCollectionDataStoreControl resource name string.
    *
@@ -2928,6 +3075,127 @@ export class ControlServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationDataStoreControl resource name string.
    *
diff --git a/packages/google-cloud-discoveryengine/src/v1/control_service_proto_list.json b/packages/google-cloud-discoveryengine/src/v1/control_service_proto_list.json
index 9deb6123f5a..1da503d8002 100644
--- a/packages/google-cloud-discoveryengine/src/v1/control_service_proto_list.json
+++ b/packages/google-cloud-discoveryengine/src/v1/control_service_proto_list.json
@@ -1,5 +1,6 @@
 [
   "../../protos/google/cloud/discoveryengine/v1/answer.proto",
+  "../../protos/google/cloud/discoveryengine/v1/chunk.proto",
   "../../protos/google/cloud/discoveryengine/v1/common.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion_service.proto",
diff --git a/packages/google-cloud-discoveryengine/src/v1/conversational_search_service_client.ts b/packages/google-cloud-discoveryengine/src/v1/conversational_search_service_client.ts
index 5d696cd54a6..acbeb181d61 100644
--- a/packages/google-cloud-discoveryengine/src/v1/conversational_search_service_client.ts
+++ b/packages/google-cloud-discoveryengine/src/v1/conversational_search_service_client.ts
@@ -221,6 +221,10 @@ export class ConversationalSearchServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationCollectionDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/controls/{control}'
@@ -284,6 +288,10 @@ export class ConversationalSearchServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/controls/{control}'
@@ -1129,6 +1137,24 @@ export class ConversationalSearchServiceClient {
    *
    *   The field must be a UTF-8 encoded string with a length limit of 128
    *   characters. Otherwise, an  `INVALID_ARGUMENT`  error is returned.
+   * @param {number[]} request.userLabels
+   *   The user labels applied to a resource must meet the following requirements:
+   *
+   *   * Each resource can have multiple labels, up to a maximum of 64.
+   *   * Each label must be a key-value pair.
+   *   * Keys have a minimum length of 1 character and a maximum length of 63
+   *     characters and cannot be empty. Values can be empty and have a maximum
+   *     length of 63 characters.
+   *   * Keys and values can contain only lowercase letters, numeric characters,
+   *     underscores, and dashes. All characters must use UTF-8 encoding, and
+   *     international characters are allowed.
+   *   * The key portion of a label must be unique. However, you can use the same
+   *     key with multiple resources.
+   *   * Keys must start with a lowercase letter or international character.
+   *
+   *   See [Google Cloud
+   *   Document](https://cloud.google.com/resource-manager/docs/creating-managing-labels#requirements)
+   *   for more details.
    * @param {object} [options]
    *   Call options. See {@link https://googleapis.dev/nodejs/google-gax/latest/interfaces/CallOptions.html|CallOptions} for more details.
    * @returns {Promise} - The promise which resolves to an array.
@@ -2559,6 +2585,145 @@ export class ConversationalSearchServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationCollectionDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} collection
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationCollectionDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    collection: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        collection: collection,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the collection from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the collection.
+   */
+  matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).collection;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationCollectionDataStoreControl resource name string.
    *
@@ -4169,6 +4334,127 @@ export class ConversationalSearchServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationDataStoreControl resource name string.
    *
diff --git a/packages/google-cloud-discoveryengine/src/v1/conversational_search_service_proto_list.json b/packages/google-cloud-discoveryengine/src/v1/conversational_search_service_proto_list.json
index 9deb6123f5a..1da503d8002 100644
--- a/packages/google-cloud-discoveryengine/src/v1/conversational_search_service_proto_list.json
+++ b/packages/google-cloud-discoveryengine/src/v1/conversational_search_service_proto_list.json
@@ -1,5 +1,6 @@
 [
   "../../protos/google/cloud/discoveryengine/v1/answer.proto",
+  "../../protos/google/cloud/discoveryengine/v1/chunk.proto",
   "../../protos/google/cloud/discoveryengine/v1/common.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion_service.proto",
diff --git a/packages/google-cloud-discoveryengine/src/v1/data_store_service_client.ts b/packages/google-cloud-discoveryengine/src/v1/data_store_service_client.ts
index 9440222ee39..f443a8faf94 100644
--- a/packages/google-cloud-discoveryengine/src/v1/data_store_service_client.ts
+++ b/packages/google-cloud-discoveryengine/src/v1/data_store_service_client.ts
@@ -227,6 +227,10 @@ export class DataStoreServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationCollectionDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/controls/{control}'
@@ -282,6 +286,10 @@ export class DataStoreServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/controls/{control}'
@@ -2015,6 +2023,145 @@ export class DataStoreServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationCollectionDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} collection
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationCollectionDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    collection: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        collection: collection,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the collection from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the collection.
+   */
+  matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).collection;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationCollectionDataStoreControl resource name string.
    *
@@ -3419,6 +3566,127 @@ export class DataStoreServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationDataStoreControl resource name string.
    *
diff --git a/packages/google-cloud-discoveryengine/src/v1/data_store_service_proto_list.json b/packages/google-cloud-discoveryengine/src/v1/data_store_service_proto_list.json
index 9deb6123f5a..1da503d8002 100644
--- a/packages/google-cloud-discoveryengine/src/v1/data_store_service_proto_list.json
+++ b/packages/google-cloud-discoveryengine/src/v1/data_store_service_proto_list.json
@@ -1,5 +1,6 @@
 [
   "../../protos/google/cloud/discoveryengine/v1/answer.proto",
+  "../../protos/google/cloud/discoveryengine/v1/chunk.proto",
   "../../protos/google/cloud/discoveryengine/v1/common.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion_service.proto",
diff --git a/packages/google-cloud-discoveryengine/src/v1/document_service_client.ts b/packages/google-cloud-discoveryengine/src/v1/document_service_client.ts
index abcadee1d9e..862bf928957 100644
--- a/packages/google-cloud-discoveryengine/src/v1/document_service_client.ts
+++ b/packages/google-cloud-discoveryengine/src/v1/document_service_client.ts
@@ -228,6 +228,10 @@ export class DocumentServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationCollectionDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/controls/{control}'
@@ -287,6 +291,10 @@ export class DocumentServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/controls/{control}'
@@ -1089,6 +1097,8 @@ export class DocumentServiceClient {
    *   Cloud SQL input source.
    * @param {google.cloud.discoveryengine.v1.FirestoreSource} request.firestoreSource
    *   Firestore input source.
+   * @param {google.cloud.discoveryengine.v1.AlloyDbSource} request.alloyDbSource
+   *   AlloyDB input source.
    * @param {google.cloud.discoveryengine.v1.BigtableSource} request.bigtableSource
    *   Cloud Bigtable input source.
    * @param {string} request.parent
@@ -2358,6 +2368,145 @@ export class DocumentServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationCollectionDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} collection
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationCollectionDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    collection: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        collection: collection,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the collection from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the collection.
+   */
+  matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).collection;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationCollectionDataStoreControl resource name string.
    *
@@ -3847,6 +3996,127 @@ export class DocumentServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationDataStoreControl resource name string.
    *
diff --git a/packages/google-cloud-discoveryengine/src/v1/document_service_proto_list.json b/packages/google-cloud-discoveryengine/src/v1/document_service_proto_list.json
index 9deb6123f5a..1da503d8002 100644
--- a/packages/google-cloud-discoveryengine/src/v1/document_service_proto_list.json
+++ b/packages/google-cloud-discoveryengine/src/v1/document_service_proto_list.json
@@ -1,5 +1,6 @@
 [
   "../../protos/google/cloud/discoveryengine/v1/answer.proto",
+  "../../protos/google/cloud/discoveryengine/v1/chunk.proto",
   "../../protos/google/cloud/discoveryengine/v1/common.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion_service.proto",
diff --git a/packages/google-cloud-discoveryengine/src/v1/engine_service_client.ts b/packages/google-cloud-discoveryengine/src/v1/engine_service_client.ts
index 04c30060f5b..ea6daf080c2 100644
--- a/packages/google-cloud-discoveryengine/src/v1/engine_service_client.ts
+++ b/packages/google-cloud-discoveryengine/src/v1/engine_service_client.ts
@@ -227,6 +227,10 @@ export class EngineServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationCollectionDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/controls/{control}'
@@ -282,6 +286,10 @@ export class EngineServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/controls/{control}'
@@ -1933,6 +1941,145 @@ export class EngineServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationCollectionDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} collection
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationCollectionDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    collection: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        collection: collection,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the collection from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the collection.
+   */
+  matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).collection;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationCollectionDataStoreControl resource name string.
    *
@@ -3337,6 +3484,127 @@ export class EngineServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationDataStoreControl resource name string.
    *
diff --git a/packages/google-cloud-discoveryengine/src/v1/engine_service_proto_list.json b/packages/google-cloud-discoveryengine/src/v1/engine_service_proto_list.json
index 9deb6123f5a..1da503d8002 100644
--- a/packages/google-cloud-discoveryengine/src/v1/engine_service_proto_list.json
+++ b/packages/google-cloud-discoveryengine/src/v1/engine_service_proto_list.json
@@ -1,5 +1,6 @@
 [
   "../../protos/google/cloud/discoveryengine/v1/answer.proto",
+  "../../protos/google/cloud/discoveryengine/v1/chunk.proto",
   "../../protos/google/cloud/discoveryengine/v1/common.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion_service.proto",
diff --git a/packages/google-cloud-discoveryengine/src/v1/gapic_metadata.json b/packages/google-cloud-discoveryengine/src/v1/gapic_metadata.json
index fc7963b1a35..bf77fe662c5 100644
--- a/packages/google-cloud-discoveryengine/src/v1/gapic_metadata.json
+++ b/packages/google-cloud-discoveryengine/src/v1/gapic_metadata.json
@@ -24,6 +24,16 @@
               "methods": [
                 "purgeSuggestionDenyListEntries"
               ]
+            },
+            "ImportCompletionSuggestions": {
+              "methods": [
+                "importCompletionSuggestions"
+              ]
+            },
+            "PurgeCompletionSuggestions": {
+              "methods": [
+                "purgeCompletionSuggestions"
+              ]
             }
           }
         },
@@ -44,6 +54,16 @@
               "methods": [
                 "purgeSuggestionDenyListEntries"
               ]
+            },
+            "ImportCompletionSuggestions": {
+              "methods": [
+                "importCompletionSuggestions"
+              ]
+            },
+            "PurgeCompletionSuggestions": {
+              "methods": [
+                "purgeCompletionSuggestions"
+              ]
             }
           }
         }
diff --git a/packages/google-cloud-discoveryengine/src/v1/grounded_generation_service_client.ts b/packages/google-cloud-discoveryengine/src/v1/grounded_generation_service_client.ts
index 00613602961..915ab5e2eea 100644
--- a/packages/google-cloud-discoveryengine/src/v1/grounded_generation_service_client.ts
+++ b/packages/google-cloud-discoveryengine/src/v1/grounded_generation_service_client.ts
@@ -222,6 +222,10 @@ export class GroundedGenerationServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationCollectionDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/controls/{control}'
@@ -277,6 +281,10 @@ export class GroundedGenerationServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/controls/{control}'
@@ -1029,6 +1037,145 @@ export class GroundedGenerationServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationCollectionDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} collection
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationCollectionDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    collection: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        collection: collection,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the collection from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the collection.
+   */
+  matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).collection;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationCollectionDataStoreControl resource name string.
    *
@@ -2433,6 +2580,127 @@ export class GroundedGenerationServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationDataStoreControl resource name string.
    *
diff --git a/packages/google-cloud-discoveryengine/src/v1/grounded_generation_service_proto_list.json b/packages/google-cloud-discoveryengine/src/v1/grounded_generation_service_proto_list.json
index 9deb6123f5a..1da503d8002 100644
--- a/packages/google-cloud-discoveryengine/src/v1/grounded_generation_service_proto_list.json
+++ b/packages/google-cloud-discoveryengine/src/v1/grounded_generation_service_proto_list.json
@@ -1,5 +1,6 @@
 [
   "../../protos/google/cloud/discoveryengine/v1/answer.proto",
+  "../../protos/google/cloud/discoveryengine/v1/chunk.proto",
   "../../protos/google/cloud/discoveryengine/v1/common.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion_service.proto",
diff --git a/packages/google-cloud-discoveryengine/src/v1/project_service_client.ts b/packages/google-cloud-discoveryengine/src/v1/project_service_client.ts
index 3f5ef124736..251f7eeacfb 100644
--- a/packages/google-cloud-discoveryengine/src/v1/project_service_client.ts
+++ b/packages/google-cloud-discoveryengine/src/v1/project_service_client.ts
@@ -222,6 +222,10 @@ export class ProjectServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationCollectionDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/controls/{control}'
@@ -277,6 +281,10 @@ export class ProjectServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/controls/{control}'
@@ -1311,6 +1319,145 @@ export class ProjectServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationCollectionDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} collection
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationCollectionDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    collection: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        collection: collection,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the collection from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the collection.
+   */
+  matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).collection;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationCollectionDataStoreControl resource name string.
    *
@@ -2715,6 +2862,127 @@ export class ProjectServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationDataStoreControl resource name string.
    *
diff --git a/packages/google-cloud-discoveryengine/src/v1/project_service_proto_list.json b/packages/google-cloud-discoveryengine/src/v1/project_service_proto_list.json
index 9deb6123f5a..1da503d8002 100644
--- a/packages/google-cloud-discoveryengine/src/v1/project_service_proto_list.json
+++ b/packages/google-cloud-discoveryengine/src/v1/project_service_proto_list.json
@@ -1,5 +1,6 @@
 [
   "../../protos/google/cloud/discoveryengine/v1/answer.proto",
+  "../../protos/google/cloud/discoveryengine/v1/chunk.proto",
   "../../protos/google/cloud/discoveryengine/v1/common.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion_service.proto",
diff --git a/packages/google-cloud-discoveryengine/src/v1/rank_service_client.ts b/packages/google-cloud-discoveryengine/src/v1/rank_service_client.ts
index c780c0347ba..a449a7975c7 100644
--- a/packages/google-cloud-discoveryengine/src/v1/rank_service_client.ts
+++ b/packages/google-cloud-discoveryengine/src/v1/rank_service_client.ts
@@ -218,6 +218,10 @@ export class RankServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationCollectionDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/controls/{control}'
@@ -273,6 +277,10 @@ export class RankServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/controls/{control}'
@@ -972,6 +980,145 @@ export class RankServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationCollectionDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} collection
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationCollectionDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    collection: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        collection: collection,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the collection from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the collection.
+   */
+  matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).collection;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationCollectionDataStoreControl resource name string.
    *
@@ -2376,6 +2523,127 @@ export class RankServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationDataStoreControl resource name string.
    *
diff --git a/packages/google-cloud-discoveryengine/src/v1/rank_service_proto_list.json b/packages/google-cloud-discoveryengine/src/v1/rank_service_proto_list.json
index 9deb6123f5a..1da503d8002 100644
--- a/packages/google-cloud-discoveryengine/src/v1/rank_service_proto_list.json
+++ b/packages/google-cloud-discoveryengine/src/v1/rank_service_proto_list.json
@@ -1,5 +1,6 @@
 [
   "../../protos/google/cloud/discoveryengine/v1/answer.proto",
+  "../../protos/google/cloud/discoveryengine/v1/chunk.proto",
   "../../protos/google/cloud/discoveryengine/v1/common.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion_service.proto",
diff --git a/packages/google-cloud-discoveryengine/src/v1/recommendation_service_client.ts b/packages/google-cloud-discoveryengine/src/v1/recommendation_service_client.ts
index ebb775c113d..c202636fdbf 100644
--- a/packages/google-cloud-discoveryengine/src/v1/recommendation_service_client.ts
+++ b/packages/google-cloud-discoveryengine/src/v1/recommendation_service_client.ts
@@ -219,6 +219,10 @@ export class RecommendationServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationCollectionDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/controls/{control}'
@@ -282,6 +286,10 @@ export class RecommendationServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/controls/{control}'
@@ -1066,6 +1074,145 @@ export class RecommendationServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationCollectionDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} collection
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationCollectionDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    collection: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        collection: collection,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the collection from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the collection.
+   */
+  matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).collection;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationCollectionDataStoreControl resource name string.
    *
@@ -2676,6 +2823,127 @@ export class RecommendationServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationDataStoreControl resource name string.
    *
diff --git a/packages/google-cloud-discoveryengine/src/v1/recommendation_service_proto_list.json b/packages/google-cloud-discoveryengine/src/v1/recommendation_service_proto_list.json
index 9deb6123f5a..1da503d8002 100644
--- a/packages/google-cloud-discoveryengine/src/v1/recommendation_service_proto_list.json
+++ b/packages/google-cloud-discoveryengine/src/v1/recommendation_service_proto_list.json
@@ -1,5 +1,6 @@
 [
   "../../protos/google/cloud/discoveryengine/v1/answer.proto",
+  "../../protos/google/cloud/discoveryengine/v1/chunk.proto",
   "../../protos/google/cloud/discoveryengine/v1/common.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion_service.proto",
diff --git a/packages/google-cloud-discoveryengine/src/v1/schema_service_client.ts b/packages/google-cloud-discoveryengine/src/v1/schema_service_client.ts
index 42ec7059521..0eef8acce6a 100644
--- a/packages/google-cloud-discoveryengine/src/v1/schema_service_client.ts
+++ b/packages/google-cloud-discoveryengine/src/v1/schema_service_client.ts
@@ -223,6 +223,10 @@ export class SchemaServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationCollectionDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/controls/{control}'
@@ -278,6 +282,10 @@ export class SchemaServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/controls/{control}'
@@ -1942,6 +1950,145 @@ export class SchemaServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationCollectionDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} collection
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationCollectionDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    collection: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        collection: collection,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the collection from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the collection.
+   */
+  matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).collection;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationCollectionDataStoreControl resource name string.
    *
@@ -3346,6 +3493,127 @@ export class SchemaServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationDataStoreControl resource name string.
    *
diff --git a/packages/google-cloud-discoveryengine/src/v1/schema_service_proto_list.json b/packages/google-cloud-discoveryengine/src/v1/schema_service_proto_list.json
index 9deb6123f5a..1da503d8002 100644
--- a/packages/google-cloud-discoveryengine/src/v1/schema_service_proto_list.json
+++ b/packages/google-cloud-discoveryengine/src/v1/schema_service_proto_list.json
@@ -1,5 +1,6 @@
 [
   "../../protos/google/cloud/discoveryengine/v1/answer.proto",
+  "../../protos/google/cloud/discoveryengine/v1/chunk.proto",
   "../../protos/google/cloud/discoveryengine/v1/common.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion_service.proto",
diff --git a/packages/google-cloud-discoveryengine/src/v1/search_service_client.ts b/packages/google-cloud-discoveryengine/src/v1/search_service_client.ts
index b595d803da8..a81ecb9c02f 100644
--- a/packages/google-cloud-discoveryengine/src/v1/search_service_client.ts
+++ b/packages/google-cloud-discoveryengine/src/v1/search_service_client.ts
@@ -224,6 +224,10 @@ export class SearchServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationCollectionDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/controls/{control}'
@@ -291,6 +295,10 @@ export class SearchServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/controls/{control}'
@@ -603,6 +611,12 @@ export class SearchServiceClient {
    *   Highly recommended for analytics.
    *   {@link protos.google.cloud.discoveryengine.v1.UserInfo.user_agent|UserInfo.user_agent}
    *   is used to deduce `device_type` for analytics.
+   * @param {string} request.languageCode
+   *   The BCP-47 language code, such as "en-US" or "sr-Latn". For more
+   *   information, see [Standard
+   *   fields](https://cloud.google.com/apis/design/standard_fields). This field
+   *   helps to better interpret the query. If a value isn't specified, the query
+   *   language code is automatically detected, which may not be accurate.
    * @param {number[]} request.facetSpecs
    *   Facet specifications for faceted search. If empty, no facets are returned.
    *
@@ -672,6 +686,41 @@ export class SearchServiceClient {
    *   See [Google Cloud
    *   Document](https://cloud.google.com/resource-manager/docs/creating-managing-labels#requirements)
    *   for more details.
+   * @param {google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec} request.searchAsYouTypeSpec
+   *   Search as you type configuration. Only supported for the
+   *   {@link protos.google.cloud.discoveryengine.v1.IndustryVertical.MEDIA|IndustryVertical.MEDIA}
+   *   vertical.
+   * @param {string} request.session
+   *   The session resource name. Optional.
+   *
+   *   Session allows users to do multi-turn /search API calls or coordination
+   *   between /search API calls and /answer API calls.
+   *
+   *   Example #1 (multi-turn /search API calls):
+   *     1. Call /search API with the auto-session mode (see below).
+   *     2. Call /search API with the session ID generated in the first call.
+   *        Here, the previous search query gets considered in query
+   *        standing. I.e., if the first query is "How did Alphabet do in 2022?"
+   *        and the current query is "How about 2023?", the current query will
+   *        be interpreted as "How did Alphabet do in 2023?".
+   *
+   *   Example #2 (coordination between /search API calls and /answer API calls):
+   *     1. Call /search API with the auto-session mode (see below).
+   *     2. Call /answer API with the session ID generated in the first call.
+   *        Here, the answer generation happens in the context of the search
+   *        results from the first search call.
+   *
+   *   Auto-session mode: when `projects/.../sessions/-` is used, a new session
+   *   gets automatically created. Otherwise, users can use the create-session API
+   *   to create a session manually.
+   *
+   *   Multi-turn Search feature is currently at private GA stage. Please use
+   *   v1alpha or v1beta version instead before we launch this feature to public
+   *   GA. Or ask for allowlisting through Google Support team.
+   * @param {google.cloud.discoveryengine.v1.SearchRequest.SessionSpec} request.sessionSpec
+   *   Session specification.
+   *
+   *   Can be used only when `session` is set.
    * @param {object} [options]
    *   Call options. See {@link https://googleapis.dev/nodejs/google-gax/latest/interfaces/CallOptions.html|CallOptions} for more details.
    * @returns {Promise} - The promise which resolves to an array.
@@ -851,6 +900,12 @@ export class SearchServiceClient {
    *   Highly recommended for analytics.
    *   {@link protos.google.cloud.discoveryengine.v1.UserInfo.user_agent|UserInfo.user_agent}
    *   is used to deduce `device_type` for analytics.
+   * @param {string} request.languageCode
+   *   The BCP-47 language code, such as "en-US" or "sr-Latn". For more
+   *   information, see [Standard
+   *   fields](https://cloud.google.com/apis/design/standard_fields). This field
+   *   helps to better interpret the query. If a value isn't specified, the query
+   *   language code is automatically detected, which may not be accurate.
    * @param {number[]} request.facetSpecs
    *   Facet specifications for faceted search. If empty, no facets are returned.
    *
@@ -920,6 +975,41 @@ export class SearchServiceClient {
    *   See [Google Cloud
    *   Document](https://cloud.google.com/resource-manager/docs/creating-managing-labels#requirements)
    *   for more details.
+   * @param {google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec} request.searchAsYouTypeSpec
+   *   Search as you type configuration. Only supported for the
+   *   {@link protos.google.cloud.discoveryengine.v1.IndustryVertical.MEDIA|IndustryVertical.MEDIA}
+   *   vertical.
+   * @param {string} request.session
+   *   The session resource name. Optional.
+   *
+   *   Session allows users to do multi-turn /search API calls or coordination
+   *   between /search API calls and /answer API calls.
+   *
+   *   Example #1 (multi-turn /search API calls):
+   *     1. Call /search API with the auto-session mode (see below).
+   *     2. Call /search API with the session ID generated in the first call.
+   *        Here, the previous search query gets considered in query
+   *        standing. I.e., if the first query is "How did Alphabet do in 2022?"
+   *        and the current query is "How about 2023?", the current query will
+   *        be interpreted as "How did Alphabet do in 2023?".
+   *
+   *   Example #2 (coordination between /search API calls and /answer API calls):
+   *     1. Call /search API with the auto-session mode (see below).
+   *     2. Call /answer API with the session ID generated in the first call.
+   *        Here, the answer generation happens in the context of the search
+   *        results from the first search call.
+   *
+   *   Auto-session mode: when `projects/.../sessions/-` is used, a new session
+   *   gets automatically created. Otherwise, users can use the create-session API
+   *   to create a session manually.
+   *
+   *   Multi-turn Search feature is currently at private GA stage. Please use
+   *   v1alpha or v1beta version instead before we launch this feature to public
+   *   GA. Or ask for allowlisting through Google Support team.
+   * @param {google.cloud.discoveryengine.v1.SearchRequest.SessionSpec} request.sessionSpec
+   *   Session specification.
+   *
+   *   Can be used only when `session` is set.
    * @param {object} [options]
    *   Call options. See {@link https://googleapis.dev/nodejs/google-gax/latest/interfaces/CallOptions.html|CallOptions} for more details.
    * @returns {Stream}
@@ -1053,6 +1143,12 @@ export class SearchServiceClient {
    *   Highly recommended for analytics.
    *   {@link protos.google.cloud.discoveryengine.v1.UserInfo.user_agent|UserInfo.user_agent}
    *   is used to deduce `device_type` for analytics.
+   * @param {string} request.languageCode
+   *   The BCP-47 language code, such as "en-US" or "sr-Latn". For more
+   *   information, see [Standard
+   *   fields](https://cloud.google.com/apis/design/standard_fields). This field
+   *   helps to better interpret the query. If a value isn't specified, the query
+   *   language code is automatically detected, which may not be accurate.
    * @param {number[]} request.facetSpecs
    *   Facet specifications for faceted search. If empty, no facets are returned.
    *
@@ -1122,6 +1218,41 @@ export class SearchServiceClient {
    *   See [Google Cloud
    *   Document](https://cloud.google.com/resource-manager/docs/creating-managing-labels#requirements)
    *   for more details.
+   * @param {google.cloud.discoveryengine.v1.SearchRequest.SearchAsYouTypeSpec} request.searchAsYouTypeSpec
+   *   Search as you type configuration. Only supported for the
+   *   {@link protos.google.cloud.discoveryengine.v1.IndustryVertical.MEDIA|IndustryVertical.MEDIA}
+   *   vertical.
+   * @param {string} request.session
+   *   The session resource name. Optional.
+   *
+   *   Session allows users to do multi-turn /search API calls or coordination
+   *   between /search API calls and /answer API calls.
+   *
+   *   Example #1 (multi-turn /search API calls):
+   *     1. Call /search API with the auto-session mode (see below).
+   *     2. Call /search API with the session ID generated in the first call.
+   *        Here, the previous search query gets considered in query
+   *        standing. I.e., if the first query is "How did Alphabet do in 2022?"
+   *        and the current query is "How about 2023?", the current query will
+   *        be interpreted as "How did Alphabet do in 2023?".
+   *
+   *   Example #2 (coordination between /search API calls and /answer API calls):
+   *     1. Call /search API with the auto-session mode (see below).
+   *     2. Call /answer API with the session ID generated in the first call.
+   *        Here, the answer generation happens in the context of the search
+   *        results from the first search call.
+   *
+   *   Auto-session mode: when `projects/.../sessions/-` is used, a new session
+   *   gets automatically created. Otherwise, users can use the create-session API
+   *   to create a session manually.
+   *
+   *   Multi-turn Search feature is currently at private GA stage. Please use
+   *   v1alpha or v1beta version instead before we launch this feature to public
+   *   GA. Or ask for allowlisting through Google Support team.
+   * @param {google.cloud.discoveryengine.v1.SearchRequest.SessionSpec} request.sessionSpec
+   *   Session specification.
+   *
+   *   Can be used only when `session` is set.
    * @param {object} [options]
    *   Call options. See {@link https://googleapis.dev/nodejs/google-gax/latest/interfaces/CallOptions.html|CallOptions} for more details.
    * @returns {Object}
@@ -1636,6 +1767,145 @@ export class SearchServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationCollectionDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} collection
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationCollectionDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    collection: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        collection: collection,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the collection from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the collection.
+   */
+  matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).collection;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationCollectionDataStoreControl resource name string.
    *
@@ -3331,6 +3601,127 @@ export class SearchServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationDataStoreControl resource name string.
    *
diff --git a/packages/google-cloud-discoveryengine/src/v1/search_service_proto_list.json b/packages/google-cloud-discoveryengine/src/v1/search_service_proto_list.json
index 9deb6123f5a..1da503d8002 100644
--- a/packages/google-cloud-discoveryengine/src/v1/search_service_proto_list.json
+++ b/packages/google-cloud-discoveryengine/src/v1/search_service_proto_list.json
@@ -1,5 +1,6 @@
 [
   "../../protos/google/cloud/discoveryengine/v1/answer.proto",
+  "../../protos/google/cloud/discoveryengine/v1/chunk.proto",
   "../../protos/google/cloud/discoveryengine/v1/common.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion_service.proto",
diff --git a/packages/google-cloud-discoveryengine/src/v1/site_search_engine_service_client.ts b/packages/google-cloud-discoveryengine/src/v1/site_search_engine_service_client.ts
index 193269ff01e..da6f1894946 100644
--- a/packages/google-cloud-discoveryengine/src/v1/site_search_engine_service_client.ts
+++ b/packages/google-cloud-discoveryengine/src/v1/site_search_engine_service_client.ts
@@ -224,6 +224,10 @@ export class SiteSearchEngineServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationCollectionDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/controls/{control}'
@@ -279,6 +283,10 @@ export class SiteSearchEngineServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/controls/{control}'
@@ -3089,6 +3097,145 @@ export class SiteSearchEngineServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationCollectionDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} collection
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationCollectionDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    collection: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        collection: collection,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the collection from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the collection.
+   */
+  matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).collection;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationCollectionDataStoreControl resource name string.
    *
@@ -4493,6 +4640,127 @@ export class SiteSearchEngineServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationDataStoreControl resource name string.
    *
diff --git a/packages/google-cloud-discoveryengine/src/v1/site_search_engine_service_proto_list.json b/packages/google-cloud-discoveryengine/src/v1/site_search_engine_service_proto_list.json
index 9deb6123f5a..1da503d8002 100644
--- a/packages/google-cloud-discoveryengine/src/v1/site_search_engine_service_proto_list.json
+++ b/packages/google-cloud-discoveryengine/src/v1/site_search_engine_service_proto_list.json
@@ -1,5 +1,6 @@
 [
   "../../protos/google/cloud/discoveryengine/v1/answer.proto",
+  "../../protos/google/cloud/discoveryengine/v1/chunk.proto",
   "../../protos/google/cloud/discoveryengine/v1/common.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion_service.proto",
diff --git a/packages/google-cloud-discoveryengine/src/v1/user_event_service_client.ts b/packages/google-cloud-discoveryengine/src/v1/user_event_service_client.ts
index 2d554a7b849..ae82dd91945 100644
--- a/packages/google-cloud-discoveryengine/src/v1/user_event_service_client.ts
+++ b/packages/google-cloud-discoveryengine/src/v1/user_event_service_client.ts
@@ -221,6 +221,10 @@ export class UserEventServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationCollectionDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/controls/{control}'
@@ -276,6 +280,10 @@ export class UserEventServiceClient {
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}'
         ),
+      projectLocationDataStoreBranchDocumentChunkPathTemplate:
+        new this._gaxModule.PathTemplate(
+          'projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}/chunks/{chunk}'
+        ),
       projectLocationDataStoreControlPathTemplate:
         new this._gaxModule.PathTemplate(
           'projects/{project}/locations/{location}/dataStores/{data_store}/controls/{control}'
@@ -1531,6 +1539,145 @@ export class UserEventServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationCollectionDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} collection
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationCollectionDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    collection: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        collection: collection,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the collection from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the collection.
+   */
+  matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).collection;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationCollectionDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationCollectionDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_collection_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+    projectLocationCollectionDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationCollectionDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationCollectionDataStoreControl resource name string.
    *
@@ -2935,6 +3082,127 @@ export class UserEventServiceClient {
     ).document;
   }
 
+  /**
+   * Return a fully-qualified projectLocationDataStoreBranchDocumentChunk resource name string.
+   *
+   * @param {string} project
+   * @param {string} location
+   * @param {string} data_store
+   * @param {string} branch
+   * @param {string} document
+   * @param {string} chunk
+   * @returns {string} Resource name string.
+   */
+  projectLocationDataStoreBranchDocumentChunkPath(
+    project: string,
+    location: string,
+    dataStore: string,
+    branch: string,
+    document: string,
+    chunk: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render(
+      {
+        project: project,
+        location: location,
+        data_store: dataStore,
+        branch: branch,
+        document: document,
+        chunk: chunk,
+      }
+    );
+  }
+
+  /**
+   * Parse the project from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the project.
+   */
+  matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).project;
+  }
+
+  /**
+   * Parse the location from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the location.
+   */
+  matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).location;
+  }
+
+  /**
+   * Parse the data_store from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the data_store.
+   */
+  matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).data_store;
+  }
+
+  /**
+   * Parse the branch from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the branch.
+   */
+  matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).branch;
+  }
+
+  /**
+   * Parse the document from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the document.
+   */
+  matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).document;
+  }
+
+  /**
+   * Parse the chunk from ProjectLocationDataStoreBranchDocumentChunk resource.
+   *
+   * @param {string} projectLocationDataStoreBranchDocumentChunkName
+   *   A fully-qualified path representing project_location_data_store_branch_document_chunk resource.
+   * @returns {string} A string representing the chunk.
+   */
+  matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+    projectLocationDataStoreBranchDocumentChunkName: string
+  ) {
+    return this.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match(
+      projectLocationDataStoreBranchDocumentChunkName
+    ).chunk;
+  }
+
   /**
    * Return a fully-qualified projectLocationDataStoreControl resource name string.
    *
diff --git a/packages/google-cloud-discoveryengine/src/v1/user_event_service_proto_list.json b/packages/google-cloud-discoveryengine/src/v1/user_event_service_proto_list.json
index 9deb6123f5a..1da503d8002 100644
--- a/packages/google-cloud-discoveryengine/src/v1/user_event_service_proto_list.json
+++ b/packages/google-cloud-discoveryengine/src/v1/user_event_service_proto_list.json
@@ -1,5 +1,6 @@
 [
   "../../protos/google/cloud/discoveryengine/v1/answer.proto",
+  "../../protos/google/cloud/discoveryengine/v1/chunk.proto",
   "../../protos/google/cloud/discoveryengine/v1/common.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion.proto",
   "../../protos/google/cloud/discoveryengine/v1/completion_service.proto",
diff --git a/packages/google-cloud-discoveryengine/test/gapic_completion_service_v1.ts b/packages/google-cloud-discoveryengine/test/gapic_completion_service_v1.ts
index 3ba1fba1bcd..ab0987d018d 100644
--- a/packages/google-cloud-discoveryengine/test/gapic_completion_service_v1.ts
+++ b/packages/google-cloud-discoveryengine/test/gapic_completion_service_v1.ts
@@ -826,6 +826,402 @@ describe('v1.CompletionServiceClient', () => {
       assert((client.operationsClient.getOperation as SinonStub).getCall(0));
     });
   });
+
+  describe('importCompletionSuggestions', () => {
+    it('invokes importCompletionSuggestions without error', async () => {
+      const client = new completionserviceModule.v1.CompletionServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      const request = generateSampleMessage(
+        new protos.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest()
+      );
+      const defaultValue1 = getTypeDefaultValue(
+        '.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest',
+        ['parent']
+      );
+      request.parent = defaultValue1;
+      const expectedHeaderRequestParams = `parent=${defaultValue1}`;
+      const expectedResponse = generateSampleMessage(
+        new protos.google.longrunning.Operation()
+      );
+      client.innerApiCalls.importCompletionSuggestions =
+        stubLongRunningCall(expectedResponse);
+      const [operation] = await client.importCompletionSuggestions(request);
+      const [response] = await operation.promise();
+      assert.deepStrictEqual(response, expectedResponse);
+      const actualRequest = (
+        client.innerApiCalls.importCompletionSuggestions as SinonStub
+      ).getCall(0).args[0];
+      assert.deepStrictEqual(actualRequest, request);
+      const actualHeaderRequestParams = (
+        client.innerApiCalls.importCompletionSuggestions as SinonStub
+      ).getCall(0).args[1].otherArgs.headers['x-goog-request-params'];
+      assert(actualHeaderRequestParams.includes(expectedHeaderRequestParams));
+    });
+
+    it('invokes importCompletionSuggestions without error using callback', async () => {
+      const client = new completionserviceModule.v1.CompletionServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      const request = generateSampleMessage(
+        new protos.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest()
+      );
+      const defaultValue1 = getTypeDefaultValue(
+        '.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest',
+        ['parent']
+      );
+      request.parent = defaultValue1;
+      const expectedHeaderRequestParams = `parent=${defaultValue1}`;
+      const expectedResponse = generateSampleMessage(
+        new protos.google.longrunning.Operation()
+      );
+      client.innerApiCalls.importCompletionSuggestions =
+        stubLongRunningCallWithCallback(expectedResponse);
+      const promise = new Promise((resolve, reject) => {
+        client.importCompletionSuggestions(
+          request,
+          (
+            err?: Error | null,
+            result?: LROperation<
+              protos.google.cloud.discoveryengine.v1.IImportCompletionSuggestionsResponse,
+              protos.google.cloud.discoveryengine.v1.IImportCompletionSuggestionsMetadata
+            > | null
+          ) => {
+            if (err) {
+              reject(err);
+            } else {
+              resolve(result);
+            }
+          }
+        );
+      });
+      const operation = (await promise) as LROperation<
+        protos.google.cloud.discoveryengine.v1.IImportCompletionSuggestionsResponse,
+        protos.google.cloud.discoveryengine.v1.IImportCompletionSuggestionsMetadata
+      >;
+      const [response] = await operation.promise();
+      assert.deepStrictEqual(response, expectedResponse);
+      const actualRequest = (
+        client.innerApiCalls.importCompletionSuggestions as SinonStub
+      ).getCall(0).args[0];
+      assert.deepStrictEqual(actualRequest, request);
+      const actualHeaderRequestParams = (
+        client.innerApiCalls.importCompletionSuggestions as SinonStub
+      ).getCall(0).args[1].otherArgs.headers['x-goog-request-params'];
+      assert(actualHeaderRequestParams.includes(expectedHeaderRequestParams));
+    });
+
+    it('invokes importCompletionSuggestions with call error', async () => {
+      const client = new completionserviceModule.v1.CompletionServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      const request = generateSampleMessage(
+        new protos.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest()
+      );
+      const defaultValue1 = getTypeDefaultValue(
+        '.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest',
+        ['parent']
+      );
+      request.parent = defaultValue1;
+      const expectedHeaderRequestParams = `parent=${defaultValue1}`;
+      const expectedError = new Error('expected');
+      client.innerApiCalls.importCompletionSuggestions = stubLongRunningCall(
+        undefined,
+        expectedError
+      );
+      await assert.rejects(
+        client.importCompletionSuggestions(request),
+        expectedError
+      );
+      const actualRequest = (
+        client.innerApiCalls.importCompletionSuggestions as SinonStub
+      ).getCall(0).args[0];
+      assert.deepStrictEqual(actualRequest, request);
+      const actualHeaderRequestParams = (
+        client.innerApiCalls.importCompletionSuggestions as SinonStub
+      ).getCall(0).args[1].otherArgs.headers['x-goog-request-params'];
+      assert(actualHeaderRequestParams.includes(expectedHeaderRequestParams));
+    });
+
+    it('invokes importCompletionSuggestions with LRO error', async () => {
+      const client = new completionserviceModule.v1.CompletionServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      const request = generateSampleMessage(
+        new protos.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest()
+      );
+      const defaultValue1 = getTypeDefaultValue(
+        '.google.cloud.discoveryengine.v1.ImportCompletionSuggestionsRequest',
+        ['parent']
+      );
+      request.parent = defaultValue1;
+      const expectedHeaderRequestParams = `parent=${defaultValue1}`;
+      const expectedError = new Error('expected');
+      client.innerApiCalls.importCompletionSuggestions = stubLongRunningCall(
+        undefined,
+        undefined,
+        expectedError
+      );
+      const [operation] = await client.importCompletionSuggestions(request);
+      await assert.rejects(operation.promise(), expectedError);
+      const actualRequest = (
+        client.innerApiCalls.importCompletionSuggestions as SinonStub
+      ).getCall(0).args[0];
+      assert.deepStrictEqual(actualRequest, request);
+      const actualHeaderRequestParams = (
+        client.innerApiCalls.importCompletionSuggestions as SinonStub
+      ).getCall(0).args[1].otherArgs.headers['x-goog-request-params'];
+      assert(actualHeaderRequestParams.includes(expectedHeaderRequestParams));
+    });
+
+    it('invokes checkImportCompletionSuggestionsProgress without error', async () => {
+      const client = new completionserviceModule.v1.CompletionServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      const expectedResponse = generateSampleMessage(
+        new operationsProtos.google.longrunning.Operation()
+      );
+      expectedResponse.name = 'test';
+      expectedResponse.response = {type_url: 'url', value: Buffer.from('')};
+      expectedResponse.metadata = {type_url: 'url', value: Buffer.from('')};
+
+      client.operationsClient.getOperation = stubSimpleCall(expectedResponse);
+      const decodedOperation =
+        await client.checkImportCompletionSuggestionsProgress(
+          expectedResponse.name
+        );
+      assert.deepStrictEqual(decodedOperation.name, expectedResponse.name);
+      assert(decodedOperation.metadata);
+      assert((client.operationsClient.getOperation as SinonStub).getCall(0));
+    });
+
+    it('invokes checkImportCompletionSuggestionsProgress with error', async () => {
+      const client = new completionserviceModule.v1.CompletionServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      const expectedError = new Error('expected');
+
+      client.operationsClient.getOperation = stubSimpleCall(
+        undefined,
+        expectedError
+      );
+      await assert.rejects(
+        client.checkImportCompletionSuggestionsProgress(''),
+        expectedError
+      );
+      assert((client.operationsClient.getOperation as SinonStub).getCall(0));
+    });
+  });
+
+  describe('purgeCompletionSuggestions', () => {
+    it('invokes purgeCompletionSuggestions without error', async () => {
+      const client = new completionserviceModule.v1.CompletionServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      const request = generateSampleMessage(
+        new protos.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest()
+      );
+      const defaultValue1 = getTypeDefaultValue(
+        '.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest',
+        ['parent']
+      );
+      request.parent = defaultValue1;
+      const expectedHeaderRequestParams = `parent=${defaultValue1}`;
+      const expectedResponse = generateSampleMessage(
+        new protos.google.longrunning.Operation()
+      );
+      client.innerApiCalls.purgeCompletionSuggestions =
+        stubLongRunningCall(expectedResponse);
+      const [operation] = await client.purgeCompletionSuggestions(request);
+      const [response] = await operation.promise();
+      assert.deepStrictEqual(response, expectedResponse);
+      const actualRequest = (
+        client.innerApiCalls.purgeCompletionSuggestions as SinonStub
+      ).getCall(0).args[0];
+      assert.deepStrictEqual(actualRequest, request);
+      const actualHeaderRequestParams = (
+        client.innerApiCalls.purgeCompletionSuggestions as SinonStub
+      ).getCall(0).args[1].otherArgs.headers['x-goog-request-params'];
+      assert(actualHeaderRequestParams.includes(expectedHeaderRequestParams));
+    });
+
+    it('invokes purgeCompletionSuggestions without error using callback', async () => {
+      const client = new completionserviceModule.v1.CompletionServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      const request = generateSampleMessage(
+        new protos.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest()
+      );
+      const defaultValue1 = getTypeDefaultValue(
+        '.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest',
+        ['parent']
+      );
+      request.parent = defaultValue1;
+      const expectedHeaderRequestParams = `parent=${defaultValue1}`;
+      const expectedResponse = generateSampleMessage(
+        new protos.google.longrunning.Operation()
+      );
+      client.innerApiCalls.purgeCompletionSuggestions =
+        stubLongRunningCallWithCallback(expectedResponse);
+      const promise = new Promise((resolve, reject) => {
+        client.purgeCompletionSuggestions(
+          request,
+          (
+            err?: Error | null,
+            result?: LROperation<
+              protos.google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsResponse,
+              protos.google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsMetadata
+            > | null
+          ) => {
+            if (err) {
+              reject(err);
+            } else {
+              resolve(result);
+            }
+          }
+        );
+      });
+      const operation = (await promise) as LROperation<
+        protos.google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsResponse,
+        protos.google.cloud.discoveryengine.v1.IPurgeCompletionSuggestionsMetadata
+      >;
+      const [response] = await operation.promise();
+      assert.deepStrictEqual(response, expectedResponse);
+      const actualRequest = (
+        client.innerApiCalls.purgeCompletionSuggestions as SinonStub
+      ).getCall(0).args[0];
+      assert.deepStrictEqual(actualRequest, request);
+      const actualHeaderRequestParams = (
+        client.innerApiCalls.purgeCompletionSuggestions as SinonStub
+      ).getCall(0).args[1].otherArgs.headers['x-goog-request-params'];
+      assert(actualHeaderRequestParams.includes(expectedHeaderRequestParams));
+    });
+
+    it('invokes purgeCompletionSuggestions with call error', async () => {
+      const client = new completionserviceModule.v1.CompletionServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      const request = generateSampleMessage(
+        new protos.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest()
+      );
+      const defaultValue1 = getTypeDefaultValue(
+        '.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest',
+        ['parent']
+      );
+      request.parent = defaultValue1;
+      const expectedHeaderRequestParams = `parent=${defaultValue1}`;
+      const expectedError = new Error('expected');
+      client.innerApiCalls.purgeCompletionSuggestions = stubLongRunningCall(
+        undefined,
+        expectedError
+      );
+      await assert.rejects(
+        client.purgeCompletionSuggestions(request),
+        expectedError
+      );
+      const actualRequest = (
+        client.innerApiCalls.purgeCompletionSuggestions as SinonStub
+      ).getCall(0).args[0];
+      assert.deepStrictEqual(actualRequest, request);
+      const actualHeaderRequestParams = (
+        client.innerApiCalls.purgeCompletionSuggestions as SinonStub
+      ).getCall(0).args[1].otherArgs.headers['x-goog-request-params'];
+      assert(actualHeaderRequestParams.includes(expectedHeaderRequestParams));
+    });
+
+    it('invokes purgeCompletionSuggestions with LRO error', async () => {
+      const client = new completionserviceModule.v1.CompletionServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      const request = generateSampleMessage(
+        new protos.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest()
+      );
+      const defaultValue1 = getTypeDefaultValue(
+        '.google.cloud.discoveryengine.v1.PurgeCompletionSuggestionsRequest',
+        ['parent']
+      );
+      request.parent = defaultValue1;
+      const expectedHeaderRequestParams = `parent=${defaultValue1}`;
+      const expectedError = new Error('expected');
+      client.innerApiCalls.purgeCompletionSuggestions = stubLongRunningCall(
+        undefined,
+        undefined,
+        expectedError
+      );
+      const [operation] = await client.purgeCompletionSuggestions(request);
+      await assert.rejects(operation.promise(), expectedError);
+      const actualRequest = (
+        client.innerApiCalls.purgeCompletionSuggestions as SinonStub
+      ).getCall(0).args[0];
+      assert.deepStrictEqual(actualRequest, request);
+      const actualHeaderRequestParams = (
+        client.innerApiCalls.purgeCompletionSuggestions as SinonStub
+      ).getCall(0).args[1].otherArgs.headers['x-goog-request-params'];
+      assert(actualHeaderRequestParams.includes(expectedHeaderRequestParams));
+    });
+
+    it('invokes checkPurgeCompletionSuggestionsProgress without error', async () => {
+      const client = new completionserviceModule.v1.CompletionServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      const expectedResponse = generateSampleMessage(
+        new operationsProtos.google.longrunning.Operation()
+      );
+      expectedResponse.name = 'test';
+      expectedResponse.response = {type_url: 'url', value: Buffer.from('')};
+      expectedResponse.metadata = {type_url: 'url', value: Buffer.from('')};
+
+      client.operationsClient.getOperation = stubSimpleCall(expectedResponse);
+      const decodedOperation =
+        await client.checkPurgeCompletionSuggestionsProgress(
+          expectedResponse.name
+        );
+      assert.deepStrictEqual(decodedOperation.name, expectedResponse.name);
+      assert(decodedOperation.metadata);
+      assert((client.operationsClient.getOperation as SinonStub).getCall(0));
+    });
+
+    it('invokes checkPurgeCompletionSuggestionsProgress with error', async () => {
+      const client = new completionserviceModule.v1.CompletionServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      const expectedError = new Error('expected');
+
+      client.operationsClient.getOperation = stubSimpleCall(
+        undefined,
+        expectedError
+      );
+      await assert.rejects(
+        client.checkPurgeCompletionSuggestionsProgress(''),
+        expectedError
+      );
+      assert((client.operationsClient.getOperation as SinonStub).getCall(0));
+    });
+  });
   describe('getLocation', () => {
     it('invokes getLocation without error', async () => {
       const client = new completionserviceModule.v1.CompletionServiceClient({
@@ -1692,6 +2088,171 @@ describe('v1.CompletionServiceClient', () => {
       });
     });
 
+    describe('projectLocationCollectionDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationCollectionDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        collection: 'collectionValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client = new completionserviceModule.v1.CompletionServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationCollectionDataStoreBranchDocumentChunkPath', () => {
+        const result =
+          client.projectLocationCollectionDataStoreBranchDocumentChunkPath(
+            'projectValue',
+            'locationValue',
+            'collectionValue',
+            'dataStoreValue',
+            'branchValue',
+            'documentValue',
+            'chunkValue'
+          );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'collectionValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationCollectionDataStoreControl', () => {
       const fakePath =
         '/rendered/path/projectLocationCollectionDataStoreControl';
@@ -3411,6 +3972,151 @@ describe('v1.CompletionServiceClient', () => {
       });
     });
 
+    describe('projectLocationDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client = new completionserviceModule.v1.CompletionServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationDataStoreBranchDocumentChunkPath', () => {
+        const result = client.projectLocationDataStoreBranchDocumentChunkPath(
+          'projectValue',
+          'locationValue',
+          'dataStoreValue',
+          'branchValue',
+          'documentValue',
+          'chunkValue'
+        );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationDataStoreControl', () => {
       const fakePath = '/rendered/path/projectLocationDataStoreControl';
       const expectedParameters = {
diff --git a/packages/google-cloud-discoveryengine/test/gapic_control_service_v1.ts b/packages/google-cloud-discoveryengine/test/gapic_control_service_v1.ts
index 22a1a90cb33..3a15ecc4150 100644
--- a/packages/google-cloud-discoveryengine/test/gapic_control_service_v1.ts
+++ b/packages/google-cloud-discoveryengine/test/gapic_control_service_v1.ts
@@ -1768,6 +1768,171 @@ describe('v1.ControlServiceClient', () => {
       });
     });
 
+    describe('projectLocationCollectionDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationCollectionDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        collection: 'collectionValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client = new controlserviceModule.v1.ControlServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationCollectionDataStoreBranchDocumentChunkPath', () => {
+        const result =
+          client.projectLocationCollectionDataStoreBranchDocumentChunkPath(
+            'projectValue',
+            'locationValue',
+            'collectionValue',
+            'dataStoreValue',
+            'branchValue',
+            'documentValue',
+            'chunkValue'
+          );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'collectionValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationCollectionDataStoreControl', () => {
       const fakePath =
         '/rendered/path/projectLocationCollectionDataStoreControl';
@@ -3487,6 +3652,151 @@ describe('v1.ControlServiceClient', () => {
       });
     });
 
+    describe('projectLocationDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client = new controlserviceModule.v1.ControlServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationDataStoreBranchDocumentChunkPath', () => {
+        const result = client.projectLocationDataStoreBranchDocumentChunkPath(
+          'projectValue',
+          'locationValue',
+          'dataStoreValue',
+          'branchValue',
+          'documentValue',
+          'chunkValue'
+        );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationDataStoreControl', () => {
       const fakePath = '/rendered/path/projectLocationDataStoreControl';
       const expectedParameters = {
diff --git a/packages/google-cloud-discoveryengine/test/gapic_conversational_search_service_v1.ts b/packages/google-cloud-discoveryengine/test/gapic_conversational_search_service_v1.ts
index 4cb5eff6ff6..4bc2c93f8ba 100644
--- a/packages/google-cloud-discoveryengine/test/gapic_conversational_search_service_v1.ts
+++ b/packages/google-cloud-discoveryengine/test/gapic_conversational_search_service_v1.ts
@@ -3194,6 +3194,174 @@ describe('v1.ConversationalSearchServiceClient', () => {
       });
     });
 
+    describe('projectLocationCollectionDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationCollectionDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        collection: 'collectionValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client =
+        new conversationalsearchserviceModule.v1.ConversationalSearchServiceClient(
+          {
+            credentials: {client_email: 'bogus', private_key: 'bogus'},
+            projectId: 'bogus',
+          }
+        );
+      client.initialize();
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationCollectionDataStoreBranchDocumentChunkPath', () => {
+        const result =
+          client.projectLocationCollectionDataStoreBranchDocumentChunkPath(
+            'projectValue',
+            'locationValue',
+            'collectionValue',
+            'dataStoreValue',
+            'branchValue',
+            'documentValue',
+            'chunkValue'
+          );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'collectionValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationCollectionDataStoreControl', () => {
       const fakePath =
         '/rendered/path/projectLocationCollectionDataStoreControl';
@@ -5214,6 +5382,154 @@ describe('v1.ConversationalSearchServiceClient', () => {
       });
     });
 
+    describe('projectLocationDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client =
+        new conversationalsearchserviceModule.v1.ConversationalSearchServiceClient(
+          {
+            credentials: {client_email: 'bogus', private_key: 'bogus'},
+            projectId: 'bogus',
+          }
+        );
+      client.initialize();
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationDataStoreBranchDocumentChunkPath', () => {
+        const result = client.projectLocationDataStoreBranchDocumentChunkPath(
+          'projectValue',
+          'locationValue',
+          'dataStoreValue',
+          'branchValue',
+          'documentValue',
+          'chunkValue'
+        );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationDataStoreControl', () => {
       const fakePath = '/rendered/path/projectLocationDataStoreControl';
       const expectedParameters = {
diff --git a/packages/google-cloud-discoveryengine/test/gapic_data_store_service_v1.ts b/packages/google-cloud-discoveryengine/test/gapic_data_store_service_v1.ts
index 7b42af39ddd..44ba6234359 100644
--- a/packages/google-cloud-discoveryengine/test/gapic_data_store_service_v1.ts
+++ b/packages/google-cloud-discoveryengine/test/gapic_data_store_service_v1.ts
@@ -2254,6 +2254,171 @@ describe('v1.DataStoreServiceClient', () => {
       });
     });
 
+    describe('projectLocationCollectionDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationCollectionDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        collection: 'collectionValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client = new datastoreserviceModule.v1.DataStoreServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationCollectionDataStoreBranchDocumentChunkPath', () => {
+        const result =
+          client.projectLocationCollectionDataStoreBranchDocumentChunkPath(
+            'projectValue',
+            'locationValue',
+            'collectionValue',
+            'dataStoreValue',
+            'branchValue',
+            'documentValue',
+            'chunkValue'
+          );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'collectionValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationCollectionDataStoreControl', () => {
       const fakePath =
         '/rendered/path/projectLocationCollectionDataStoreControl';
@@ -3973,6 +4138,151 @@ describe('v1.DataStoreServiceClient', () => {
       });
     });
 
+    describe('projectLocationDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client = new datastoreserviceModule.v1.DataStoreServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationDataStoreBranchDocumentChunkPath', () => {
+        const result = client.projectLocationDataStoreBranchDocumentChunkPath(
+          'projectValue',
+          'locationValue',
+          'dataStoreValue',
+          'branchValue',
+          'documentValue',
+          'chunkValue'
+        );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationDataStoreControl', () => {
       const fakePath = '/rendered/path/projectLocationDataStoreControl';
       const expectedParameters = {
diff --git a/packages/google-cloud-discoveryengine/test/gapic_document_service_v1.ts b/packages/google-cloud-discoveryengine/test/gapic_document_service_v1.ts
index 0ce380e3b1e..4660094b61c 100644
--- a/packages/google-cloud-discoveryengine/test/gapic_document_service_v1.ts
+++ b/packages/google-cloud-discoveryengine/test/gapic_document_service_v1.ts
@@ -2574,6 +2574,171 @@ describe('v1.DocumentServiceClient', () => {
       });
     });
 
+    describe('projectLocationCollectionDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationCollectionDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        collection: 'collectionValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client = new documentserviceModule.v1.DocumentServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationCollectionDataStoreBranchDocumentChunkPath', () => {
+        const result =
+          client.projectLocationCollectionDataStoreBranchDocumentChunkPath(
+            'projectValue',
+            'locationValue',
+            'collectionValue',
+            'dataStoreValue',
+            'branchValue',
+            'documentValue',
+            'chunkValue'
+          );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'collectionValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationCollectionDataStoreControl', () => {
       const fakePath =
         '/rendered/path/projectLocationCollectionDataStoreControl';
@@ -4386,6 +4551,151 @@ describe('v1.DocumentServiceClient', () => {
       });
     });
 
+    describe('projectLocationDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client = new documentserviceModule.v1.DocumentServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationDataStoreBranchDocumentChunkPath', () => {
+        const result = client.projectLocationDataStoreBranchDocumentChunkPath(
+          'projectValue',
+          'locationValue',
+          'dataStoreValue',
+          'branchValue',
+          'documentValue',
+          'chunkValue'
+        );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationDataStoreControl', () => {
       const fakePath = '/rendered/path/projectLocationDataStoreControl';
       const expectedParameters = {
diff --git a/packages/google-cloud-discoveryengine/test/gapic_engine_service_v1.ts b/packages/google-cloud-discoveryengine/test/gapic_engine_service_v1.ts
index ae05a5881d0..e6cbfc04307 100644
--- a/packages/google-cloud-discoveryengine/test/gapic_engine_service_v1.ts
+++ b/packages/google-cloud-discoveryengine/test/gapic_engine_service_v1.ts
@@ -2244,6 +2244,171 @@ describe('v1.EngineServiceClient', () => {
       });
     });
 
+    describe('projectLocationCollectionDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationCollectionDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        collection: 'collectionValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client = new engineserviceModule.v1.EngineServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationCollectionDataStoreBranchDocumentChunkPath', () => {
+        const result =
+          client.projectLocationCollectionDataStoreBranchDocumentChunkPath(
+            'projectValue',
+            'locationValue',
+            'collectionValue',
+            'dataStoreValue',
+            'branchValue',
+            'documentValue',
+            'chunkValue'
+          );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'collectionValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationCollectionDataStoreControl', () => {
       const fakePath =
         '/rendered/path/projectLocationCollectionDataStoreControl';
@@ -3963,6 +4128,151 @@ describe('v1.EngineServiceClient', () => {
       });
     });
 
+    describe('projectLocationDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client = new engineserviceModule.v1.EngineServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationDataStoreBranchDocumentChunkPath', () => {
+        const result = client.projectLocationDataStoreBranchDocumentChunkPath(
+          'projectValue',
+          'locationValue',
+          'dataStoreValue',
+          'branchValue',
+          'documentValue',
+          'chunkValue'
+        );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationDataStoreControl', () => {
       const fakePath = '/rendered/path/projectLocationDataStoreControl';
       const expectedParameters = {
diff --git a/packages/google-cloud-discoveryengine/test/gapic_grounded_generation_service_v1.ts b/packages/google-cloud-discoveryengine/test/gapic_grounded_generation_service_v1.ts
index 407cb320b02..e983fd0eee1 100644
--- a/packages/google-cloud-discoveryengine/test/gapic_grounded_generation_service_v1.ts
+++ b/packages/google-cloud-discoveryengine/test/gapic_grounded_generation_service_v1.ts
@@ -1053,6 +1053,172 @@ describe('v1.GroundedGenerationServiceClient', () => {
       });
     });
 
+    describe('projectLocationCollectionDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationCollectionDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        collection: 'collectionValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client =
+        new groundedgenerationserviceModule.v1.GroundedGenerationServiceClient({
+          credentials: {client_email: 'bogus', private_key: 'bogus'},
+          projectId: 'bogus',
+        });
+      client.initialize();
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationCollectionDataStoreBranchDocumentChunkPath', () => {
+        const result =
+          client.projectLocationCollectionDataStoreBranchDocumentChunkPath(
+            'projectValue',
+            'locationValue',
+            'collectionValue',
+            'dataStoreValue',
+            'branchValue',
+            'documentValue',
+            'chunkValue'
+          );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'collectionValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationCollectionDataStoreControl', () => {
       const fakePath =
         '/rendered/path/projectLocationCollectionDataStoreControl';
@@ -2786,6 +2952,152 @@ describe('v1.GroundedGenerationServiceClient', () => {
       });
     });
 
+    describe('projectLocationDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client =
+        new groundedgenerationserviceModule.v1.GroundedGenerationServiceClient({
+          credentials: {client_email: 'bogus', private_key: 'bogus'},
+          projectId: 'bogus',
+        });
+      client.initialize();
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationDataStoreBranchDocumentChunkPath', () => {
+        const result = client.projectLocationDataStoreBranchDocumentChunkPath(
+          'projectValue',
+          'locationValue',
+          'dataStoreValue',
+          'branchValue',
+          'documentValue',
+          'chunkValue'
+        );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationDataStoreControl', () => {
       const fakePath = '/rendered/path/projectLocationDataStoreControl';
       const expectedParameters = {
diff --git a/packages/google-cloud-discoveryengine/test/gapic_project_service_v1.ts b/packages/google-cloud-discoveryengine/test/gapic_project_service_v1.ts
index 1f2ff404529..cc1dedeccd4 100644
--- a/packages/google-cloud-discoveryengine/test/gapic_project_service_v1.ts
+++ b/packages/google-cloud-discoveryengine/test/gapic_project_service_v1.ts
@@ -1355,6 +1355,171 @@ describe('v1.ProjectServiceClient', () => {
       });
     });
 
+    describe('projectLocationCollectionDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationCollectionDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        collection: 'collectionValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client = new projectserviceModule.v1.ProjectServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationCollectionDataStoreBranchDocumentChunkPath', () => {
+        const result =
+          client.projectLocationCollectionDataStoreBranchDocumentChunkPath(
+            'projectValue',
+            'locationValue',
+            'collectionValue',
+            'dataStoreValue',
+            'branchValue',
+            'documentValue',
+            'chunkValue'
+          );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'collectionValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationCollectionDataStoreControl', () => {
       const fakePath =
         '/rendered/path/projectLocationCollectionDataStoreControl';
@@ -3074,6 +3239,151 @@ describe('v1.ProjectServiceClient', () => {
       });
     });
 
+    describe('projectLocationDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client = new projectserviceModule.v1.ProjectServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationDataStoreBranchDocumentChunkPath', () => {
+        const result = client.projectLocationDataStoreBranchDocumentChunkPath(
+          'projectValue',
+          'locationValue',
+          'dataStoreValue',
+          'branchValue',
+          'documentValue',
+          'chunkValue'
+        );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationDataStoreControl', () => {
       const fakePath = '/rendered/path/projectLocationDataStoreControl';
       const expectedParameters = {
diff --git a/packages/google-cloud-discoveryengine/test/gapic_rank_service_v1.ts b/packages/google-cloud-discoveryengine/test/gapic_rank_service_v1.ts
index 128d0028fb6..835db9a5396 100644
--- a/packages/google-cloud-discoveryengine/test/gapic_rank_service_v1.ts
+++ b/packages/google-cloud-discoveryengine/test/gapic_rank_service_v1.ts
@@ -949,6 +949,171 @@ describe('v1.RankServiceClient', () => {
       });
     });
 
+    describe('projectLocationCollectionDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationCollectionDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        collection: 'collectionValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client = new rankserviceModule.v1.RankServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationCollectionDataStoreBranchDocumentChunkPath', () => {
+        const result =
+          client.projectLocationCollectionDataStoreBranchDocumentChunkPath(
+            'projectValue',
+            'locationValue',
+            'collectionValue',
+            'dataStoreValue',
+            'branchValue',
+            'documentValue',
+            'chunkValue'
+          );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'collectionValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationCollectionDataStoreControl', () => {
       const fakePath =
         '/rendered/path/projectLocationCollectionDataStoreControl';
@@ -2668,6 +2833,151 @@ describe('v1.RankServiceClient', () => {
       });
     });
 
+    describe('projectLocationDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client = new rankserviceModule.v1.RankServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationDataStoreBranchDocumentChunkPath', () => {
+        const result = client.projectLocationDataStoreBranchDocumentChunkPath(
+          'projectValue',
+          'locationValue',
+          'dataStoreValue',
+          'branchValue',
+          'documentValue',
+          'chunkValue'
+        );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationDataStoreControl', () => {
       const fakePath = '/rendered/path/projectLocationDataStoreControl';
       const expectedParameters = {
diff --git a/packages/google-cloud-discoveryengine/test/gapic_recommendation_service_v1.ts b/packages/google-cloud-discoveryengine/test/gapic_recommendation_service_v1.ts
index 90393fe3d3e..5b0e01df033 100644
--- a/packages/google-cloud-discoveryengine/test/gapic_recommendation_service_v1.ts
+++ b/packages/google-cloud-discoveryengine/test/gapic_recommendation_service_v1.ts
@@ -984,6 +984,172 @@ describe('v1.RecommendationServiceClient', () => {
       });
     });
 
+    describe('projectLocationCollectionDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationCollectionDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        collection: 'collectionValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client =
+        new recommendationserviceModule.v1.RecommendationServiceClient({
+          credentials: {client_email: 'bogus', private_key: 'bogus'},
+          projectId: 'bogus',
+        });
+      client.initialize();
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationCollectionDataStoreBranchDocumentChunkPath', () => {
+        const result =
+          client.projectLocationCollectionDataStoreBranchDocumentChunkPath(
+            'projectValue',
+            'locationValue',
+            'collectionValue',
+            'dataStoreValue',
+            'branchValue',
+            'documentValue',
+            'chunkValue'
+          );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'collectionValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationCollectionDataStoreControl', () => {
       const fakePath =
         '/rendered/path/projectLocationCollectionDataStoreControl';
@@ -2972,6 +3138,152 @@ describe('v1.RecommendationServiceClient', () => {
       });
     });
 
+    describe('projectLocationDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client =
+        new recommendationserviceModule.v1.RecommendationServiceClient({
+          credentials: {client_email: 'bogus', private_key: 'bogus'},
+          projectId: 'bogus',
+        });
+      client.initialize();
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationDataStoreBranchDocumentChunkPath', () => {
+        const result = client.projectLocationDataStoreBranchDocumentChunkPath(
+          'projectValue',
+          'locationValue',
+          'dataStoreValue',
+          'branchValue',
+          'documentValue',
+          'chunkValue'
+        );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationDataStoreControl', () => {
       const fakePath = '/rendered/path/projectLocationDataStoreControl';
       const expectedParameters = {
diff --git a/packages/google-cloud-discoveryengine/test/gapic_schema_service_v1.ts b/packages/google-cloud-discoveryengine/test/gapic_schema_service_v1.ts
index 9b438e3a5ba..fd3b9eae18d 100644
--- a/packages/google-cloud-discoveryengine/test/gapic_schema_service_v1.ts
+++ b/packages/google-cloud-discoveryengine/test/gapic_schema_service_v1.ts
@@ -2240,6 +2240,171 @@ describe('v1.SchemaServiceClient', () => {
       });
     });
 
+    describe('projectLocationCollectionDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationCollectionDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        collection: 'collectionValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client = new schemaserviceModule.v1.SchemaServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationCollectionDataStoreBranchDocumentChunkPath', () => {
+        const result =
+          client.projectLocationCollectionDataStoreBranchDocumentChunkPath(
+            'projectValue',
+            'locationValue',
+            'collectionValue',
+            'dataStoreValue',
+            'branchValue',
+            'documentValue',
+            'chunkValue'
+          );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'collectionValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationCollectionDataStoreControl', () => {
       const fakePath =
         '/rendered/path/projectLocationCollectionDataStoreControl';
@@ -3959,6 +4124,151 @@ describe('v1.SchemaServiceClient', () => {
       });
     });
 
+    describe('projectLocationDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client = new schemaserviceModule.v1.SchemaServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationDataStoreBranchDocumentChunkPath', () => {
+        const result = client.projectLocationDataStoreBranchDocumentChunkPath(
+          'projectValue',
+          'locationValue',
+          'dataStoreValue',
+          'branchValue',
+          'documentValue',
+          'chunkValue'
+        );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationDataStoreControl', () => {
       const fakePath = '/rendered/path/projectLocationDataStoreControl';
       const expectedParameters = {
diff --git a/packages/google-cloud-discoveryengine/test/gapic_search_service_v1.ts b/packages/google-cloud-discoveryengine/test/gapic_search_service_v1.ts
index 8143374f107..07549c1c5f5 100644
--- a/packages/google-cloud-discoveryengine/test/gapic_search_service_v1.ts
+++ b/packages/google-cloud-discoveryengine/test/gapic_search_service_v1.ts
@@ -1328,6 +1328,171 @@ describe('v1.SearchServiceClient', () => {
       });
     });
 
+    describe('projectLocationCollectionDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationCollectionDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        collection: 'collectionValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client = new searchserviceModule.v1.SearchServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationCollectionDataStoreBranchDocumentChunkPath', () => {
+        const result =
+          client.projectLocationCollectionDataStoreBranchDocumentChunkPath(
+            'projectValue',
+            'locationValue',
+            'collectionValue',
+            'dataStoreValue',
+            'branchValue',
+            'documentValue',
+            'chunkValue'
+          );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'collectionValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationCollectionDataStoreControl', () => {
       const fakePath =
         '/rendered/path/projectLocationCollectionDataStoreControl';
@@ -3393,6 +3558,151 @@ describe('v1.SearchServiceClient', () => {
       });
     });
 
+    describe('projectLocationDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client = new searchserviceModule.v1.SearchServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationDataStoreBranchDocumentChunkPath', () => {
+        const result = client.projectLocationDataStoreBranchDocumentChunkPath(
+          'projectValue',
+          'locationValue',
+          'dataStoreValue',
+          'branchValue',
+          'documentValue',
+          'chunkValue'
+        );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationDataStoreControl', () => {
       const fakePath = '/rendered/path/projectLocationDataStoreControl';
       const expectedParameters = {
diff --git a/packages/google-cloud-discoveryengine/test/gapic_site_search_engine_service_v1.ts b/packages/google-cloud-discoveryengine/test/gapic_site_search_engine_service_v1.ts
index 4da4042717a..9fb4c93cddc 100644
--- a/packages/google-cloud-discoveryengine/test/gapic_site_search_engine_service_v1.ts
+++ b/packages/google-cloud-discoveryengine/test/gapic_site_search_engine_service_v1.ts
@@ -3831,6 +3831,172 @@ describe('v1.SiteSearchEngineServiceClient', () => {
       });
     });
 
+    describe('projectLocationCollectionDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationCollectionDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        collection: 'collectionValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client =
+        new sitesearchengineserviceModule.v1.SiteSearchEngineServiceClient({
+          credentials: {client_email: 'bogus', private_key: 'bogus'},
+          projectId: 'bogus',
+        });
+      client.initialize();
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationCollectionDataStoreBranchDocumentChunkPath', () => {
+        const result =
+          client.projectLocationCollectionDataStoreBranchDocumentChunkPath(
+            'projectValue',
+            'locationValue',
+            'collectionValue',
+            'dataStoreValue',
+            'branchValue',
+            'documentValue',
+            'chunkValue'
+          );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'collectionValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationCollectionDataStoreControl', () => {
       const fakePath =
         '/rendered/path/projectLocationCollectionDataStoreControl';
@@ -5564,6 +5730,152 @@ describe('v1.SiteSearchEngineServiceClient', () => {
       });
     });
 
+    describe('projectLocationDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client =
+        new sitesearchengineserviceModule.v1.SiteSearchEngineServiceClient({
+          credentials: {client_email: 'bogus', private_key: 'bogus'},
+          projectId: 'bogus',
+        });
+      client.initialize();
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationDataStoreBranchDocumentChunkPath', () => {
+        const result = client.projectLocationDataStoreBranchDocumentChunkPath(
+          'projectValue',
+          'locationValue',
+          'dataStoreValue',
+          'branchValue',
+          'documentValue',
+          'chunkValue'
+        );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationDataStoreControl', () => {
       const fakePath = '/rendered/path/projectLocationDataStoreControl';
       const expectedParameters = {
diff --git a/packages/google-cloud-discoveryengine/test/gapic_user_event_service_v1.ts b/packages/google-cloud-discoveryengine/test/gapic_user_event_service_v1.ts
index bad04ef309b..2ae2ab4f87b 100644
--- a/packages/google-cloud-discoveryengine/test/gapic_user_event_service_v1.ts
+++ b/packages/google-cloud-discoveryengine/test/gapic_user_event_service_v1.ts
@@ -1621,6 +1621,171 @@ describe('v1.UserEventServiceClient', () => {
       });
     });
 
+    describe('projectLocationCollectionDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationCollectionDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        collection: 'collectionValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client = new usereventserviceModule.v1.UserEventServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationCollectionDataStoreBranchDocumentChunkPath', () => {
+        const result =
+          client.projectLocationCollectionDataStoreBranchDocumentChunkPath(
+            'projectValue',
+            'locationValue',
+            'collectionValue',
+            'dataStoreValue',
+            'branchValue',
+            'documentValue',
+            'chunkValue'
+          );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchCollectionFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'collectionValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationCollectionDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationCollectionDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationCollectionDataStoreControl', () => {
       const fakePath =
         '/rendered/path/projectLocationCollectionDataStoreControl';
@@ -3340,6 +3505,151 @@ describe('v1.UserEventServiceClient', () => {
       });
     });
 
+    describe('projectLocationDataStoreBranchDocumentChunk', () => {
+      const fakePath =
+        '/rendered/path/projectLocationDataStoreBranchDocumentChunk';
+      const expectedParameters = {
+        project: 'projectValue',
+        location: 'locationValue',
+        data_store: 'dataStoreValue',
+        branch: 'branchValue',
+        document: 'documentValue',
+        chunk: 'chunkValue',
+      };
+      const client = new usereventserviceModule.v1.UserEventServiceClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.render =
+        sinon.stub().returns(fakePath);
+      client.pathTemplates.projectLocationDataStoreBranchDocumentChunkPathTemplate.match =
+        sinon.stub().returns(expectedParameters);
+
+      it('projectLocationDataStoreBranchDocumentChunkPath', () => {
+        const result = client.projectLocationDataStoreBranchDocumentChunkPath(
+          'projectValue',
+          'locationValue',
+          'dataStoreValue',
+          'branchValue',
+          'documentValue',
+          'chunkValue'
+        );
+        assert.strictEqual(result, fakePath);
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .render as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(expectedParameters)
+        );
+      });
+
+      it('matchProjectFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchProjectFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'projectValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchLocationFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchLocationFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'locationValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDataStoreFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'dataStoreValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchBranchFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchBranchFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'branchValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchDocumentFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'documentValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+
+      it('matchChunkFromProjectLocationDataStoreBranchDocumentChunkName', () => {
+        const result =
+          client.matchChunkFromProjectLocationDataStoreBranchDocumentChunkName(
+            fakePath
+          );
+        assert.strictEqual(result, 'chunkValue');
+        assert(
+          (
+            client.pathTemplates
+              .projectLocationDataStoreBranchDocumentChunkPathTemplate
+              .match as SinonStub
+          )
+            .getCall(-1)
+            .calledWith(fakePath)
+        );
+      });
+    });
+
     describe('projectLocationDataStoreControl', () => {
       const fakePath = '/rendered/path/projectLocationDataStoreControl';
       const expectedParameters = {