code: def max_age(self, value):
          
          option = Option()
          option.number = defines.OptionRegistry.MAX_AGE.number
          option.value = int(value)
          self.del_option_by_number(defines.OptionRegistry.MAX_AGE.number)
          self.add_option(option)
docs: Set the MaxAge of the response.
  
          :type value: int
          :param value: the MaxAge option