code: def test_names_match(self):
      # Names match up.
      for (
          backend_enum,
          backend_obj,
      ) in fastmath.ops._backend_dict.items():
          self.assertEqual(backend_enum.value, backend_obj["name"])
  
      # Every backend appears in the dictionary.
      for backend_enum in fastmath.ops.Backend:
          self.assertIn(backend_enum, fastmath.ops._backend_dict)
  
imports: import collections
  from absl.testing import parameterized
  import gin
  import jax.numpy
  import numpy
  from tensorflow import test
  from trax import fastmath
label_desc: Use image node_id 9 for calling the BackendTest obj's underlying member method code with example usage: obj.test_names_match() without return types