code: def _try_backup_item(self):
          
          if not self._backup_state:
              return False
          item = self.cache.get_item(self.address, self._backup_state)
          if item:
              self._object_handler(item.address, item.value, item.state)
              return True
          else:
              False
docs: Check if a backup item is available in cache and call
          the item handler if it is.
  
          :return: `True` if backup item was found.
          :returntype: `bool`