public Builder setLastUpdateTime(com.google.protobuf.Timestamp.Builder builderForValue) {
      if (lastUpdateTimeBuilder_ == null) {
        lastUpdateTime_ = builderForValue.build();
      } else {
        lastUpdateTimeBuilder_.setMessage(builderForValue.build());
      }
      bitField0_ |= 0x00000004;
      onChanged();
      return this;
    }
<pre>
Time of the most recent processing update.
</pre>

<code>.google.protobuf.Timestamp last_update_time = 3;</code>
java-speech/proto-google-cloud-speech-v1/src/main/java/com/google/cloud/speech/v1/LongRunningRecognizeMetadata.java