code: def observe(self):
          
          for option in self.options:
              if option.number == defines.OptionRegistry.OBSERVE.number:
                  # if option.value is None:
                  #    return 0
                  if option.value is None:
                      return 0
                  return option.value
          return None
docs: Check if the request is an observing request.
  
          :return: 0, if the request is an observing request