code: def contains_value(self, value):
          
          check_not_none(value, "value can't be None")
          value_data = self._to_data(value)
          return self._encode_invoke(map_contains_value_codec, value=value_data)
docs: Determines whether this map contains one or more keys for the specified value.
  
          :param value: (object), the specified value.
          :return: (bool), ``true`` if this map contains an entry for the specified value.