docs: def get_config_items(self):
          """
          Return current configuration as a :class:`tuple` with
          option-value pairs.
  
          ::
              (('option1', value1), ('option2', value2))
          """
          return (
              ('settings', self.settings),
              ('context_class', self.context_class),
              ('interfaces', self.interfaces),
              ('logging', self.logging),
              ('name', self.name),
              ('init_handler', self.init_handler),
              ('sigusr1_handler', self.sigusr1_handler),
              ('sigusr2_handler', self.sigusr2_handler),
          )