Actually I had to add

fun MutableEntity.postSomething() = postSomething

you should also be able to do

(mutableEntity as LockedEntity).postSomething()

Sorry I guess I didn’t got your point 🙈

Wait, so it’s working for you, or my comment was vague and confusing? 🙂

I deleted my first comment because I misinterpreted the scenario, I though it could working, but in a class that inherit from

Scope

, in that case it will obviously work, also without any casting. Outside of a

Scope

class I can't see how it could work 🤔

It can help to check the compiled code for this. For the example where when() is used compiles to this.

public static final void main() {
      MutableEntity var0 = new MutableEntity();
      int var2 = false;
      var0.postSomething1((LockedEntity)var0);
   }

>>If you change the Scope interface with something like this. it would also work.

interface Scope {
   fun postSomething()
}

Yes, it will work but I don't have any reference to the entity for work with 😅 In my scenario my entity wraps an Android

LiveData

and I want reproduce something like that: