public Builder setAdvancedVoiceOptions(
        com.google.cloud.texttospeech.v1.AdvancedVoiceOptions value) {
      if (advancedVoiceOptionsBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        advancedVoiceOptions_ = value;
      } else {
        advancedVoiceOptionsBuilder_.setMessage(value);
      }
      bitField0_ |= 0x00000008;
      onChanged();
      return this;
    }
<pre>
Advanced voice options.
</pre>

<code>optional .google.cloud.texttospeech.v1.AdvancedVoiceOptions advanced_voice_options = 8;
</code>
java-texttospeech/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesizeSpeechRequest.java