@java.lang.Override
    public Builder clone() {
      return super.clone();
    }
<pre>
Metadata describing an [Operation][google.longrunning.Operation]
</pre>

Protobuf type {@code google.cloud.tpu.v1.OperationMetadata}
java-tpu/proto-google-cloud-tpu-v1/src/main/java/com/google/cloud/tpu/v1/OperationMetadata.java