public UnaryCallable<SynthesizeLongAudioRequest, Operation> synthesizeLongAudioCallable() {
    throw new UnsupportedOperationException("Not implemented: synthesizeLongAudioCallable()");
  }
Base stub class for the TextToSpeechLongAudioSynthesize service API.

<p>This class is for advanced usage and reflects the underlying API directly.
java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/stub/TextToSpeechLongAudioSynthesizeStub.java