@java.lang.Override
  public Builder newBuilderForType() {
    return newBuilder();
  }
<pre>
The time when the operation result was last updated.
</pre>

<code>.google.protobuf.Timestamp update_time = 6;</code>
java-vision/proto-google-cloud-vision-v1p4beta1/src/main/java/com/google/cloud/vision/v1p4beta1/OperationMetadata.java