def abs_src_path(self) -> str | None:
        """
        The absolute concrete path of the source file. Will use backslashes on Windows.

        Note: do not use this path to read the file, prefer `content_bytes`/`content_string`.
        """
        if self.src_dir is None:
            return None
        return os.path.normpath(os.path.join(self.src_dir, self.src_uri))

        The absolute concrete path of the source file. Will use backslashes on Windows.

        Note: do not use this path to read the file, prefer `content_bytes`/`content_string`.
        
mkdocs/structure/files.py