code: def test_get_cloud_tpu_supported_tf_versions(self):
      self.assertListEqual(
          gcp.get_cloud_tpu_supported_tf_versions(), ["2.1"]
      )
  
file_path: cloud/src/python/tensorflow_cloud/core/tests/unit/gcp_test.py
imports: from absl.testing import absltest
  from tensorflow_cloud.core import gcp
  from tensorflow_cloud.core import machine_config
label_desc: Use image node_id 4 for calling the TestGcp obj's underlying member method code with example usage: obj.test_get_cloud_tpu_supported_tf_versions() without return types