code: def rev_regs(self) -> list:
          
  
          LOGGER.debug('HolderProver.rev_regs >>>')
  
          rv = [basename(f) for f in Tails.links(self._dir_tails)]
          LOGGER.debug('HolderProver.rev_regs <<< %s', rv)
          return rv
docs: Return list of revocation registry identifiers for which HolderProver has tails files.
  
          :return: list of revocation registry identifiers for which HolderProver has tails files