@Override
            public ListTensorFlowVersionsRequest injectToken(
                ListTensorFlowVersionsRequest payload, String token) {
              return ListTensorFlowVersionsRequest.newBuilder(payload).setPageToken(token).build();
            }
The default scopes of the service.
java-tpu/google-cloud-tpu/src/main/java/com/google/cloud/tpu/v1/stub/TpuStubSettings.java