Hey all, not sure if this is a known issue or not:...

# kotlin-native

[ankushg]

Hey all, not sure if this is a known issue or not:

I have a Kotlin interface hierarchy with something like this:

sealed interface MyCollectionClass {
  val collection: Collection<String>
}

data class MyListClass: MyCollectionClass {
  override val collection: List<String>
}

data class MySetClass: MyCollectionClass {
  override val collection: Set<String>
}

Within Kotlin, when we that our concrete type is a MyListClass, we also know that collection is of type List<String>

But in Swift, even when we know we have an instance of MyListClass, the type of collection looks like a Collection<String>

I think this is only the case with `sealed interface`s — `sealed class`es seem to be working as expected.