def METHOD_NAME(self, new_absolute_include_path: str) -> None:
    assert os.path.isabs(new_absolute_include_path)
    self.append_include_path_arg(new_absolute_include_path)
    # Prevent adding multiple aliases for the same include path.
    self.already_added_include_paths |= {
        new_absolute_include_path,
        os.path.abspath(new_absolute_include_path),
        os.path.realpath(new_absolute_include_path),
    }