Processes the inner messages of a container with many of them:

            msg_container#73f1f8dc messages:vector<%Message> = MessageContainer;

async def _handle_container(self, message):
        """
        Processes the inner messages of a container with many of them:

            msg_container#73f1f8dc messages:vector<%Message> = MessageContainer;
        """
        self._log.debug('Handling container')
        for inner_message in message.obj.messages:
            await self._process_message(inner_message)