public function addServer($key, $val)
 {
     $this->owner->getServer()->getPluginManager()->callEvent($ev = new GbAddServerEvent($this->owner, $key, $val));
     if ($ev->isCancelled()) {
         return false;
     }
     $this->servers[$ev->getId()] = $ev->getAttrs();
     $this->owner->cfgSave(self::CfgTag, $this->servers);
     return true;
 }