def parse_timestamp(timestamp: str) -> datetime:
        """
        Parse timestamp string returned by GCSFileSystem.

        This ensures that the passed timestamp is timezone aware.
        """
        dt = isoparse(timestamp)
        assert dt.tzinfo is not None
        return dt

        Parse timestamp string returned by GCSFileSystem.

        This ensures that the passed timestamp is timezone aware.
        
src/datachain/client/gcs.py