public Builder clearUpdateTime() {
      bitField0_ = (bitField0_ & ~0x00000008);
      updateTime_ = null;
      if (updateTimeBuilder_ != null) {
        updateTimeBuilder_.dispose();
        updateTimeBuilder_ = null;
      }
      onChanged();
      return this;
    }
<pre>
Output only. Time of the most recent update.
</pre>

<code>.google.protobuf.Timestamp update_time = 4;</code>
java-video-intelligence/proto-google-cloud-video-intelligence-v1p1beta1/src/main/java/com/google/cloud/videointelligence/v1p1beta1/VideoAnnotationProgress.java