yii2使用less代替css示例都有哪些？

'components' => [
 'assetManager' => [
  'converter' =>
   [
    'class' => \singrana\assets\Converter::className(),
   ],
 ],
],

class AppAsset extends AssetBundle
{
 public $basePath = '@webroot';
 public $baseUrl = '@web';
 public $css = [
  'css/site.less', //*.less代替*.css并在css目录中使用.less后缀的，并在版本库中忽略.css文件
 ];
 public $js = [
 ];
 public $depends = [
  'yii\web\YiiAsset',
  'yii\bootstrap\BootstrapAsset',
 ];
}