num_workers: int = 4,
    ) -> ConcurrentLoader:
        """
        Create a concurrent generic document loader using a
        filesystem blob loader.
        """
        blob_loader = FileSystemBlobLoader(
            path, glob=glob, suffixes=suffixes, show_progress=show_progress
        )
        if isinstance(parser, str):
            blob_parser = get_parser(parser)
        else:
            blob_parser = parser
        return cls(blob_loader, blob_parser, num_workers)