Nette\Forms\Container::getControls PHP Method

    public function getControls()
    {
        return $this->getComponents(TRUE, IControl::class);
    }

 /**
  * @param Nette\Forms\Container $container
  */
 public function addControlsClasses(Nette\Forms\Container $container)
 {
     foreach ($container->getControls() as $key => $control) {
         switch ($key) {
             case 'submit':
                 $control->setAttribute('class', 'btn btn-xs btn-primary');
                 break;
             case 'cancel':
                 $control->setAttribute('class', 'btn btn-xs btn-danger');
                 break;
             default:
                 if (empty($control->getControl()->getClass())) {
                     $control->setAttribute('class', 'form-control input-sm');
                 }
                 break;
         }
     }
 }