class_docstr: Configurate test backends.
code: def __init__(self, test_case: tf_test.TestCase):
      self._test_case = test_case
  
file_path: tensorflow-upstream/tensorflow/dtensor/python/tests/test_backend_util.py
imports: import multiprocessing
  import os
  from tensorflow.dtensor.python import accelerator_util
  from tensorflow.dtensor.python import config
  from tensorflow.dtensor.python import layout
  from tensorflow.dtensor.python.tests.test_backend_name import DTENSOR_TEST_UTIL_BACKEND
  from tensorflow.python.platform import test
label_desc: Use image node_id 1 to create a new DTensorTestBackendConfigurator object  with example: obj = DTensorTestBackendConfigurator(test_case)