def get_decompression_transform_files(self, offset=0):
        """Returns a list of dicts representing ``<mets:transformFile>``
        elements with ``TRANSFORMTYPE="decompression"`` given
        ``compression_algorithm`` which is a comma-separated string of
        algorithms that must be used in the order provided to decompress
        the package, e.g., 'bzip2,tar' or 'lzma'.
        """
        compression_algorithm, _, _ = self.compression_details
        return [
            {
                "algorithm": algorithm,
                "order": str(index + offset + 1),
                "type": "decompression",
            }
            for index, algorithm in enumerate(compression_algorithm.split(","))
        ]