private function startWampServer()
    {
        if (! $this->serverInstance instanceof RatchetWampServer) {
            throw new \Exception("{$this->class} must be an instance of ".RatchetWampServer::class." to create a Wamp server");
        }

        // Decorate the server instance with a WampServer
        $this->serverInstance = new WampServer($this->serverInstance);

        return $this->bootWebSocketServer(true);
    }