public function onPublish(ConnectionInterface $connection, Topic $topic, WampRequest $request, $event, array $exclude, array $eligible)
    {
        /*
            $topic->getId() will contain the FULL requested uri, so you can proceed based on that

            if ($topic->getId() == "chat/channel/shout") ????????????????¿¿¿¿¿¿¿¿¿¿¿¿¿¿
               //shout something to all subs.
        */

        $topic->broadcast([
            'msg' => $event
        ]);
    }