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kotlinlang

Hi all , Why doesn’t kotlin allow having a internal class as a constructor parameter which is marked as private val in a public class. For example

```internal interface Mapper

class UseCase(private val mapper)```
Why does compiler say  ‘public’ function exposes its ‘internal’ parameter type when it is a `private val mapper`

`UseCase` 's constructor is public, so it can be called outside your module. However, `Mapper` is internal, so it can't be used outside your module. The result is that it's not possible to call the constructor outside the module.

You can make `UseCase` 's constructor internal:
```class UseCase internal constructor(private val mapper: Mapper)```