public Builder setVoice(
        com.google.cloud.texttospeech.v1.VoiceSelectionParams.Builder builderForValue) {
      if (voiceBuilder_ == null) {
        voice_ = builderForValue.build();
      } else {
        voiceBuilder_.setMessage(builderForValue.build());
      }
      bitField0_ |= 0x00000001;
      onChanged();
      return this;
    }
<pre>
Required. The desired voice of the synthesized audio.
</pre>

<code>
.google.cloud.texttospeech.v1.VoiceSelectionParams voice = 1 [(.google.api.field_behavior) = REQUIRED];
</code>
java-texttospeech/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/StreamingSynthesizeConfig.java