public static function getNodePath($node)
    {
        $result = '';
        if ($node instanceof static) {
            $result = $node->slug;
            if (!empty($node->parent_id)) {
                $parent = static::node($node->parent_id);
                if (!empty($parent)) {
                    $result = static::getNodePath($parent) . '/' . $result;
                }
            }
        }
        return $result;
    }