code: def _get_equivalent_stub(
      self, ext: Extension, output_file: str
  ) -> str:
      dir_ = os.path.dirname(output_file)
      _, _, name = ext.name.rpartition(".")
      return f"{os.path.join(dir_, name)}.py"
  
imports: import os
  import sys
  import itertools
  from importlib.machinery import EXTENSION_SUFFIXES
  from importlib.util import cache_from_source
  from typing import Dict, Iterator, List, Tuple
  from pathlib import Path
  from distutils.command.build_ext import build_ext
  from distutils.ccompiler import new_compiler
  from distutils.sysconfig import customize_compiler, get_config_var
  from distutils import log
  from setuptools.errors import BaseError
  from setuptools.extension import Extension, Library
  from distutils.sysconfig import _config_vars
label_desc: Use image node_id 4 for calling the build_ext obj's underlying member method code with example usage: obj._get_equivalent_stub(ext, output_file) and returns: os, str