public static function getContainers()
    {
        if (self::$containers === null) {
            self::$containers = (new Query())->select(['id', 'name', 'alias'])->from('cms_nav_container')->where(['is_deleted' => false])->indexBy('id')->orderBy(['cms_nav_container.id' => 'ASC'])->all();
        }
        
        return self::$containers;
    }