public function handleQuit(UserEvent $event, Queue $queue)
    {
        $nick = $event->getNick();
        if ($this->primaryNick !== null && $nick == $this->primaryNick) {
            $this->logger->debug("[AltNick] '$nick' disconnected, switching to primary nick");
            $queue->ircNick($this->primaryNick);
            $this->primaryNick = null;
        }
    }