ManaPHP\Mvc\Router\Group::__construct PHP Method

    public function __construct($useDefaultRoutes = true)
    {
        $this->_useDefaultRoutes = $useDefaultRoutes;
    }

 public function __construct()
 {
     parent::__construct(true);
     $this->add('/about', 'Index::about');
     $this->addGet('/about1', 'Index::about');
     $this->addGet('/about2', [IndexController::class, 'about']);
     $this->addGet('/about3', ['controller' => IndexController::class, 'action' => 'about']);
 }