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Issue Description:

My project is composed by two frameworks, A and B.
Framework B is dependent from A and uses several functions/structures for its operations.

In framework A I've used caseless enum (but it's the same with a void non-instantiable structs) as like a namespace grouping.

public enum Models { }

Then

public extension Models {
  public class ModelInA { ... }
}

Everything works fine.
Now I would to replicate the same stuff in framework B with. So:

import FrameworkA
public extension Models {
  public class ModelInB { ... }
}

Now If I try to debug and inspect an instance of ModelInB I get this error: Could not resolve type. Even more the debugger inspector row its empty.

I've tried to declare a new caseless enum in Framework B and use it to group ModelInB: as expected it works fine.

Attached screenshots demostrate the results in both cases: