Loads/dumps message
        :param msg:
        :param msg_type:
        :param use_version:
        :return:

async def message(self, msg, msg_type=None, use_version=None):
        """
        Loads/dumps message
        :param msg:
        :param msg_type:
        :param use_version:
        :return:
        """
        elem_type = msg_type if msg_type is not None else msg.__class__
        version = await self.version(elem_type, None, elem=msg) if use_version is None else use_version

        if self.is_tracked():
            return self.get_tracked()

        if hasattr(elem_type, 'boost_serialize'):
            msg = elem_type() if msg is None else msg
            self.pop_track(use_version is None)
            return await msg.boost_serialize(self, version=version)

        if self.writing:
            self.pop_track(use_version is None)
            return await self.dump_message(msg, msg_type=msg_type)
        else:
            obj = await self.load_message(msg_type, msg=msg)
            return self.track_obj(obj, use_version is None)