code: def testCastLazy(self):
      list_type = default_types.List(
          default_types.Literal("a"), default_types.Literal("b")
      )
      tuple_type = default_types.Tuple(
          default_types.Literal("c"), list_type
      )
      dict_type = default_types.Dict(
          {"key": tuple_type, "other_key": list_type},
          placeholder_type=dict,
      )
  
      value = dict_type.placeholder_value(None)
      casted_value = dict_type.cast(value, None)
  
      self.assertIs(value, casted_value)
  
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 15 for calling the DefaultTypesTest obj's underlying member method code with example usage: obj.testCastLazy() without return types