Laravel 4中的模块

在L3中，我设法创建了一个模块系统，在这个系统中，我能够从管理区域安装/卸载模块。

if(!Bundle::exists($name))
    {
        // Load the bundle
        // If a routes file exists then we'll assume it handles routes of it's own name.
        // Remember, if you need it to handle a custom route you should manually add
        // the bundle in application/bundles.php.
        Bundle::register($name, array(
                'handles'   => File::exists($path.DS.'routes.php') ? $name : null,
                'location'  => 'path: '.$path,
                'auto'      => true)
        );
        // autobundle is already in the loop that's starting bundles so we
        // can't let the normal mechanism start it. We'll start it here.
        Bundle::start($name);
    }

我怎么能在L4做到呢?L4对我来说看起来很不一样，我2个月前开始使用L3(第一个框架)