Service at most `limit` messages from the inBox.

        :param limit: the maximum number of messages to service
        :return: the number of messages successfully processed

async def serviceQueues(self, limit=None) -> int:
        """
        Service at most `limit` messages from the inBox.

        :param limit: the maximum number of messages to service
        :return: the number of messages successfully processed
        """

        return await self.inBoxRouter.handleAll(self.filterMsgs(self.inBox),
                                                limit)