Symfony\Bundle\FrameworkBundle\Controller\Controller::addFlash PHP Méthode

    protected function addFlash($type, $message)
    {
        if (!$this->container->has('session')) {
            throw new \LogicException('You can not use the addFlash method if sessions are disabled.');
        }
        $this->container->get('session')->getFlashBag()->add($type, $message);
    }

 public function addFlash($type, $message)
 {
     parent::addFlash($type, $message);
 }