@java.lang.Override
  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
    if (state_
        != com.google.cloud.vision.v1p3beta1.BatchOperationMetadata.State.STATE_UNSPECIFIED
            .getNumber()) {
      output.writeEnum(1, state_);
    }
    if (((bitField0_ & 0x00000001) != 0)) {
      output.writeMessage(2, getSubmitTime());
    }
    if (((bitField0_ & 0x00000002) != 0)) {
      output.writeMessage(3, getEndTime());
    }
    getUnknownFields().writeTo(output);
  }
<pre>
The time when the batch request is finished and
[google.longrunning.Operation.done][google.longrunning.Operation.done] is
set to true.
</pre>

<code>.google.protobuf.Timestamp end_time = 3;</code>
java-vision/proto-google-cloud-vision-v1p3beta1/src/main/java/com/google/cloud/vision/v1p3beta1/BatchOperationMetadata.java