Whenever you write generics that only occur in the...

# announcements

[karelpeeters]

Whenever you write generics that only occur in the return type you're basically promising the user that they can pick T. Now consider this code:

val clazz: KClass<out DownStopController> = position.controllerClass()

That wouldn't work, KClass<Upstart controller> isn't a subtype of KClass<out DownStartController>.