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._inbox_router.handleAll(self._inbox, limit)