diff --git a/sql/connect/server/src/main/scala/org/apache/spark/sql/connect/planner/MockObserver.scala b/sql/connect/server/src/main/scala/org/apache/spark/sql/connect/planner/MockObserver.scala
index 778c81b0cd11b..c1d950cb7fcf4 100644
--- a/sql/connect/server/src/main/scala/org/apache/spark/sql/connect/planner/MockObserver.scala
+++ b/sql/connect/server/src/main/scala/org/apache/spark/sql/connect/planner/MockObserver.scala
@@ -24,9 +24,12 @@ import org.apache.spark.connect.proto
 /*
  * The [[MockObserver]] class is a mock of the [[StreamObserver]] class from the gRPC library,
  * used for testing the process function of [[SparkConnectPlanner]].
+ *
  * Currently, the [[MockObserver]] class is located in the test folder,
  * which is not shaded by sbt-assembly, unlike the main folder.
- * This results in a compilation error when external libraries call the transform function,
+ *
+ * This results in a compilation error when open-source libraries call the
+ * [[transform(spark: SparkSession, command: proto.Command)]] function in [[SparkConnectPlannerTestUtils]],
  * which in turn calls [[SparkConnectPlanner(executeHolder).process(command, new MockObserver())]].
  *
  * To resolve this, the [[MockObserver]] class should be moved to the main folder