code: async def open(self) -> 'HolderProver':
          
  
          LOGGER.debug('Verifier.open >>>')
  
          await super().open()
          if self.cfg.get('parse-cache-on-open', False):
              Caches.parse(self.dir_cache)
  
          LOGGER.debug('Verifier.open <<<')
          return self
docs: Explicit entry. Perform ancestor opening operations,
          then parse cache from archive if so configured, and
          synchronize revocation registry to tails tree content.
  
          :return: current object