Missing customVoice in dialogflow.VoiceSelectionParams

[orgads]

Please make sure you have searched for information in the following guides.

• Search the issues already opened: https://github.com/GoogleCloudPlatform/google-cloud-node/issues
• Search StackOverflow: http://stackoverflow.com/questions/tagged/google-cloud-platform+node.js
• Check our Troubleshooting guide: https://github.com/googleapis/google-cloud-node/blob/main/docs/troubleshooting.md
• Check our FAQ: https://github.com/googleapis/google-cloud-node/blob/main/docs/faq.md
• Check our libraries HOW-TO: https://github.com/googleapis/gax-nodejs/blob/main/client-libraries.md
• Check out our authentication guide: https://github.com/googleapis/google-auth-library-nodejs
• Check out handwritten samples for many of our APIs: https://github.com/GoogleCloudPlatform/nodejs-docs-samples

A screenshot that you have tested with "Try this API".

N/A

Link to the code that reproduces this issue. A link to a public Github Repository or gist with a minimal reproduction.

https://gist.github.com/orgads/9af03eaa5db52728955de168bdc014bc

A step-by-step description of how to reproduce the issue, based on the linked reproduction.

Just try to build this file with Typescript, and it fails.

Object literal may only specify known properties, and 'customVoice' does not exist in type 'IVoiceSelectionParams'.ts(2353)

A clear and concise description of what the bug is, and what you expected to happen.

VoiceSelectionParams should contain customVoice, as it does in text-to-speech, documented here. This is missing in dialogflow, documented here.

A clear and concise description WHY you expect this behavior, i.e., was it a recent change, there is documentation that points to this behavior, etc. **

It is supported in the private CCAI dialogflow library. IIRC this is the only notable change (at least for what we use) between the official and the private sdk.