code: def testDictSerialization(self):
      dict_original = default_types.Dict(
          {
              "a": default_types.Literal(1),
              "b": default_types.Literal(2),
              "c": default_types.Literal(3),
          }
      )
  
      self.assertEqual(
          str(dict_original),
          "Dict[['a', Literal[1]], ['b', Literal[2]], ['c', Literal[3]]]",
      )
      self.assertEqual(
          serialization.deserialize(
              serialization.serialize(dict_original)
          ),
          dict_original,
      )
  
imports: import collections
  from tensorflow.core.function.trace_type import default_types
  from tensorflow.core.function.trace_type import serialization
  from tensorflow.python.platform import test
  from tensorflow.python.types import trace
label_desc: Use image node_id 12 for calling the DefaultTypesTest obj's underlying member method code with example usage: obj.testDictSerialization() without return types