def _parse_gcs_uri(self, raw_uri):
<EOL>raw_uri = directory_fmt(raw_uri)<EOL>_, docker_path = _gcs_uri_rewriter(raw_uri)<EOL>docker_uri = os.path.join(self._relative_path, docker_path)<EOL>return docker_uri<EOL>
Return a valid docker_path for a GCS bucket.