@java.lang.Override
  public boolean hasAudioStream() {
    return elementaryStreamCase_ == 2;
  }
<pre>
Encoding of an audio stream.
</pre>

<code>.google.cloud.video.transcoder.v1.AudioStream audio_stream = 2;</code>

@return Whether the audioStream field is set.
java-video-transcoder/proto-google-cloud-video-transcoder-v1/src/main/java/com/google/cloud/video/transcoder/v1/ElementaryStream.java