public Builder setEndTime(com.google.protobuf.Timestamp.Builder builderForValue) {
      if (endTimeBuilder_ == null) {
        endTime_ = builderForValue.build();
      } else {
        endTimeBuilder_.setMessage(builderForValue.build());
      }
      bitField0_ |= 0x00000200;
      onChanged();
      return this;
    }
<pre>
The time when the operation is finished and
[google.longrunning.Operation.done][google.longrunning.Operation.done] is
set to true.
</pre>

<code>.google.protobuf.Timestamp end_time = 10;</code>
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/BatchTranslateDocumentResponse.java