code: def remove_all(self, key):
          
          check_not_none(key, "key can't be none")
          return self._encode_invoke(transactional_multi_map_remove_codec, key=self._to_data(key))
docs: Transactional implementation of :func:`MultiMap.remove_all(key)
          <hazelcast.proxy.multi_map.MultiMap.remove_all>`
  
          :param key: (object), the key of the entries to remove.
          :return: (list), the collection of the values associated with the key.