protected function registerTwigExtensions()
 {
     \Twig::addTokenParser(new ExtendsParent());
     $this->app->bindIf('lava83.twig.loader.filesystem', function () {
         return new Filesystem($this->app['config']['view.paths']);
     }, true);
     \Twig::getLoader()->addLoader($this->app['lava83.twig.loader.filesystem']);
 }