public Builder mergeFrom(com.google.cloud.texttospeech.v1.SynthesizeLongAudioMetadata other) {
      if (other
          == com.google.cloud.texttospeech.v1.SynthesizeLongAudioMetadata.getDefaultInstance())
        return this;
      if (other.hasStartTime()) {
        mergeStartTime(other.getStartTime());
      }
      if (other.hasLastUpdateTime()) {
        mergeLastUpdateTime(other.getLastUpdateTime());
      }
      if (other.getProgressPercentage() != 0D) {
        setProgressPercentage(other.getProgressPercentage());
      }
      this.mergeUnknownFields(other.getUnknownFields());
      onChanged();
      return this;
    }
<pre>
Metadata for response returned by the `SynthesizeLongAudio` method.
</pre>

Protobuf type {@code google.cloud.texttospeech.v1.SynthesizeLongAudioMetadata}
java-texttospeech/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesizeLongAudioMetadata.java