code: def test_source_code_parity_on_call_impl(self) -> None:
      original_call_impl_src = inspect.getsource(
          torch.nn.Module._call_impl
      )
      lazy_ext_call_impl_src = inspect.getsource(
          LazyModuleExtensionMixin._call_impl
      )
  
      # remove comments
      original_call_impl_src = remove_comment(original_call_impl_src)
      lazy_ext_call_impl_src = remove_comment(lazy_ext_call_impl_src)
  
      # reproduce the only change:
      old_code = """
                  result = hook(self, input)
          """
      new_code = """
                  if len(inspect.signature(hook).parameters) == 3:
                      result = hook(self, input, kwargs)
                  else:
                      result = hook(self, input)
          """
      expected_lazy_ext_call_impl_src = original_call_impl_src.replace(
          old_code, new_code
      )
  
      self.assertEqual(
          lazy_ext_call_impl_src,
          expected_lazy_ext_call_impl_src,
          "Please make sure `LazyModuleExtensionMixin._call_impl` has the same source code "
          "as `torch.nn.Module._call_impl` except the expected difference that is checked "
          "in this unit test.",
      )
  
file_path: torchrec/torchrec/modules/tests/test_lazy_extension.py
imports: import inspect
  import re
  import unittest
  from typing import Tuple
  import torch
  from torch.nn.modules.lazy import LazyModuleMixin
  from torchrec.modules.lazy_extension import lazy_apply, LazyModuleExtensionMixin
label_desc: Use image node_id 1 for calling the TestLazyModuleExtensionMixin obj's underlying member method code with example usage: obj.test_source_code_parity_on_call_impl() without return types