Quick question, is there any K/Mp implementation of WeakReference?

Look at http://github.com/touchlab/stately

As far as I know there is no WeakReference in Stately

I could add one. Assume the implementation is pretty straightforward?

I can only speak for jvm and native, but yeah just a few lines of code

There's one already in Kotlin/Native

For common code

It seems JS doesn't support weak references natively, so you'll be able to create a common definition only if you don't support JS, or don't need weak reference on JS target.

Yeah, it’s an issue