private void ensureAcceleratorTypesIsMutable() {
      if (!((bitField0_ & 0x00000001) != 0)) {
        acceleratorTypes_ =
            new java.util.ArrayList<com.google.cloud.tpu.v1.AcceleratorType>(acceleratorTypes_);
        bitField0_ |= 0x00000001;
      }
    }
<pre>
Response for
[ListAcceleratorTypes][google.cloud.tpu.v1.Tpu.ListAcceleratorTypes].
</pre>

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