public function handleChanModeAddition(
        \Erebot\Interfaces\EventHandler             $handler,
        \Erebot\Interfaces\Event\Base\ChanModeGiven $event
    ) {
        $user       = $event->getTarget();
        $nick       = self::extractNick($user);
        $collator   = $this->connection->getCollator();
        $normNick   = $collator->normalizeNick($nick);
        $key        = array_search($normNick, $this->nicks);
        if ($key === false) {
            return;
        }

        $this->chans[$event->getChan()][$key][] =
            \Erebot\Utils::getVStatic($event, 'MODE_LETTER');
    }