public Builder mergeUpdateTime(com.google.protobuf.Timestamp value) {
      if (updateTimeBuilder_ == null) {
        if (((bitField0_ & 0x00000400) != 0)
            && updateTime_ != null
            && updateTime_ != com.google.protobuf.Timestamp.getDefaultInstance()) {
          getUpdateTimeBuilder().mergeFrom(value);
        } else {
          updateTime_ = value;
        }
      } else {
        updateTimeBuilder_.mergeFrom(value);
      }
      if (updateTime_ != null) {
        bitField0_ |= 0x00000400;
        onChanged();
      }
      return this;
    }
<pre>
Output only. The timestamp when the deployment was updated.
</pre>

<code>
.google.protobuf.Timestamp update_time = 11 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>
java-telcoautomation/proto-google-cloud-telcoautomation-v1alpha1/src/main/java/com/google/cloud/telcoautomation/v1alpha1/Deployment.java