except (ImportError, AssertionError):
        try:
            # __version__ is available in both multiparts, and can be mocked
            from multipart import __version__  # type: ignore[no-redef,import-untyped]

            assert __version__
            try:
                # parse_options_header is only available in the right multipart
                from multipart.multipart import (  # type: ignore[import-untyped]