Thruway\Session::onClose PHP Method

    public function onClose()
    {
        if ($this->realm !== null) {
            // only send the leave metaevent if we actually made it into the realm
            if ($this->isAuthenticated()) {
                // metaevent
                $metaInfo = $this->getMetaInfo();
                $this->getRealm()->publishMeta('wamp.metaevent.session.on_leave', [$metaInfo]);
                Logger::info($this, "Session close: " . json_encode($metaInfo));
            }
            $this->dispatcher->dispatch("LeaveRealm", new LeaveRealmEvent($this->realm, $this));
            $this->realm = null;
        }
    }