def get_checksum_metadata_tag(self):
        """ Returns a map of checksum values by the name of the hashing function that produced it."""
        if not self._checksums:
            print("Warning: No checksums have been computed for this file.")
        return {str(_hash_name): str(_hash_value) for _hash_name, _hash_value in self._checksums.items()}
Returns a map of checksum values by the name of the hashing function that produced it.