Symfony\Component\HttpKernel\Exception\NotFoundHttpException::__construct PHP Method

    public function __construct($message = '', $code = 0, \Exception $previous = null)
    {
        if (!$message) {
            $message = 'Not Found';
        }

        parent::__construct($message, 404, $previous);
    }

 /**
  * @param null       $message
  * @param \Exception $previous
  * @param int        $code
  */
 public function __construct($message = null, \Exception $previous = null, $code = 0)
 {
     if ($message === null) {
         $message = trans($this->message);
     }
     parent::__construct($message, $previous, $code);
 }