def get_subdirectory(cls, location):
        # type: (str) -> Optional[str]
        """
        Return the path to setup.py, relative to the repo root.
        Return None if setup.py is in the repo root.
        """
        return None

        Return the path to setup.py, relative to the repo root.
        Return None if setup.py is in the repo root.
        
product/gradle-plugin/src/main/python/pip/_internal/vcs/versioncontrol.py