public static function unregister()
    {
        $nc = '\\' . get_called_class();

        App::off('error',     array( $nc, 'renderError' ));
        App::off('terminate', array( $nc, 'renderPerformance' ));
        App::off('terminate', array( $nc, 'renderClasses' ));

        if (false === empty(self::$displayErrors)) {
            function_exists('init_set') && ini_set('display_errors', self::$displayErrors);

            self::$displayErrors = null;
        }
    }