Nette\Http\Session::getIterator PHP Метод

    public function getIterator()
    {
        if ($this->exists() && !self::$started) {
            $this->start();
        }
        if (isset($_SESSION['__NF']['DATA'])) {
            return new \ArrayIterator(array_keys($_SESSION['__NF']['DATA']));
        } else {
            return new \ArrayIterator();
        }
    }