public com.google.protobuf.Timestamp getUpdateTime() {
      if (updateTimeBuilder_ == null) {
        return updateTime_ == null
            ? com.google.protobuf.Timestamp.getDefaultInstance()
            : updateTime_;
      } else {
        return updateTimeBuilder_.getMessage();
      }
    }
<pre>
Output only. The most recent time this resource was modified.
</pre>

<code>
.google.protobuf.Timestamp update_time = 7 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>

@return The updateTime.
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/CustomClass.java