@java.lang.Deprecated
    public Builder clearLastUpdateTime() {
      bitField0_ = (bitField0_ & ~0x00000002);
      lastUpdateTime_ = null;
      if (lastUpdateTimeBuilder_ != null) {
        lastUpdateTimeBuilder_.dispose();
        lastUpdateTimeBuilder_ = null;
      }
      onChanged();
      return this;
    }
<pre>
Deprecated. Do not use.
</pre>

<code>.google.protobuf.Timestamp last_update_time = 2 [deprecated = true];</code>
java-texttospeech/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesizeLongAudioMetadata.java