FormKit support for Notification Settings

![](http://i.imgur.com/ahI8egI.gif)
You will only get a "No visible `@interface` for `value` declares the selector `selector:`" error for `id` values if the compiler doesn't know about any objects at all that respond to that selector.

In other words: since the compiler knows about `NSNumber`, it won't pop an error for calling `boolValue` on an `id`.