code: def test_parse_custom_class_type(self) -> None:
      custom_class_name = "namespace_foo.class_bar"
      custom_class_name_with_prefix = (
          f"__torch__.torch.classes.{custom_class_name}"
      )
      custom_class_type = cast(
          CustomClassType, Type.parse(custom_class_name_with_prefix)
      )
      self.assertTrue(isinstance(custom_class_type, CustomClassType))
      self.assertEqual(custom_class_name, custom_class_type.class_name)
      self.assertEqual(
          custom_class_name_with_prefix, str(custom_class_type)
      )
  
imports: import textwrap
  import unittest
  from typing import cast
  import expecttest
  import torchgen.dest
  import torchgen.gen
  import yaml
  from torchgen.gen import LineLoader, parse_native_yaml_struct
  from torchgen.model import Annotation, CustomClassType, DispatchKey, NativeFunctionsGroup, Type
label_desc: Use image node_id 8 for calling the TestCodegenModel obj's underlying member method code with example usage: obj.test_parse_custom_class_type() without return types