code: def decrement(self, key, value=1):
          
          self._store.decrement(self.tagged_item_key(key), value)
docs: Decrement the value of an item in the cache.
  
          :param key: The cache key
          :type key: str
  
          :param value: The decrement value
          :type value: int
  
          :rtype: int or bool