public static Builder newBuilder(com.google.cloud.texttospeech.v1.VoiceCloneParams prototype) {
    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
  }
<pre>
Required. Created by GenerateVoiceCloningKey.
</pre>

<code>string voice_cloning_key = 1 [(.google.api.field_behavior) = REQUIRED];</code>

@return The bytes for voiceCloningKey.
java-texttospeech/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/VoiceCloneParams.java