docs: def register_handlers(self, handler_classes):
          """
          Create handlers from discovered handler classes
  
          :param handler_classes: List of :class:`~responsebot.handlers.base.BaseTweetHandler`'s derived classes
          """
          for handler_class in handler_classes:
              self.handlers.append(handler_class(client=self.client))
              logging.info('Successfully registered {handler_class}'.format(
                  handler_class=getattr(handler_class, '__name__', str(handler_class)))
              )