In 1.1 it's being done [inside](https://github.com/yiisoft/yii/blob/master/framework/validators/CEmailValidator.php#L115) [validators](https://github.com/yiisoft/yii/blob/master/framework/validators/CUrlValidator.php#L112). That approach is not acceptable in 2.0 branch as i came to a conclusion. Am i right?

The other question: isn't registering asset bundles inside widgets is more logical (as they (widgets) are special kind/mix of presentation + controller layer)?