@java.lang.Override
    public Builder clear() {
      super.clear();
      bitField0_ = 0;
      createTime_ = null;
      if (createTimeBuilder_ != null) {
        createTimeBuilder_.dispose();
        createTimeBuilder_ = null;
      }
      endTime_ = null;
      if (endTimeBuilder_ != null) {
        endTimeBuilder_.dispose();
        endTimeBuilder_ = null;
      }
      target_ = "";
      verb_ = "";
      statusDetail_ = "";
      cancelRequested_ = false;
      apiVersion_ = "";
      return this;
    }
<pre>
Metadata describing an [Operation][google.longrunning.Operation]
</pre>

Protobuf type {@code google.cloud.tpu.v2.OperationMetadata}
java-tpu/proto-google-cloud-tpu-v2/src/main/java/com/google/cloud/tpu/v2/OperationMetadata.java