Pop\Nav\Nav::factory PHP Метод

    public static function factory(array $tree = null, array $config = array())
    {
        return new self($tree, $config);
    }

 public function testConstructor()
 {
     $this->assertInstanceOf('Pop\\Nav\\Nav', new Nav(array(), array()));
     $this->assertInstanceOf('Pop\\Nav\\Nav', Nav::factory(array(), array()));
 }