public com.google.protobuf.Timestamp getLastUpdateTime() {
      if (lastUpdateTimeBuilder_ == null) {
        return lastUpdateTime_ == null
            ? com.google.protobuf.Timestamp.getDefaultInstance()
            : lastUpdateTime_;
      } else {
        return lastUpdateTimeBuilder_.getMessage();
      }
    }
<pre>
Time of the most recent processing update.
</pre>

<code>.google.protobuf.Timestamp last_update_time = 3;</code>

@return The lastUpdateTime.
java-speech/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/LongRunningRecognizeMetadata.java