@java.lang.Override
    public final Builder mergeUnknownFields(
        final com.google.protobuf.UnknownFieldSet unknownFields) {
      return super.mergeUnknownFields(unknownFields);
    }
<pre>
Optional. The configuration for a voice clone. If
[VoiceCloneParams.voice_clone_key] is set, the service will choose the
voice clone matching the specified configuration.
</pre>

<code>
.google.cloud.texttospeech.v1beta1.VoiceCloneParams voice_clone = 5 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-texttospeech/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/VoiceSelectionParams.java