Return path to tails file for input revocation registry identifier.

        :param rr_id: revocation registry identifier of interest
        :return: path to tails file for input revocation registry identifier

def path_tails(self, rr_id: str) -> str:
        """
        Return path to tails file for input revocation registry identifier.

        :param rr_id: revocation registry identifier of interest
        :return: path to tails file for input revocation registry identifier
        """

        return Tails.linked(self._dir_tails, rr_id)