protected function getNode($id)
    {
        $config = $this->config;
        return $this->table()
                        ->select(null)
                        ->select("$config[id] AS id, $config[lft] AS lft, $config[rgt] AS rgt, $config[dpt] AS dpt, $config[prt] AS prt")
                        ->where($config['id'], $id)
                        ->fetch();
    }