code: def testDTypesHaveUniqueNames(self):
      dtypez = []
      names = set()
      for datatype_enum in types_pb2.DataType.values():
          if datatype_enum == types_pb2.DT_INVALID:
              continue
          dtype = dtypes.as_dtype(datatype_enum)
          dtypez.append(dtype)
          names.add(dtype.name)
      self.assertEqual(len(dtypez), len(names))
  
imports: from absl.testing import parameterized
  import numpy
  from tensorflow.python.framework import _dtypes
  from tensorflow.core.framework import types_pb2
  from tensorflow.core.function import trace_type
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import test_util
  from tensorflow.python.platform import googletest
label_desc: Use image node_id 9 for calling the TypesTest obj's underlying member method code with example usage: obj.testDTypesHaveUniqueNames() without return types