public UnaryCallSettings.Builder<SynthesizeSpeechRequest, SynthesizeSpeechResponse>
        synthesizeSpeechSettings() {
      return getStubSettingsBuilder().synthesizeSpeechSettings();
    }
Returns the builder for the settings used for calls to synthesizeSpeech.
java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/TextToSpeechSettings.java