In my package `a.b.c`, I have an `abstract` class ...

# announcements

[albertgao]

In my package a.b.c, I have an abstract class named BaseUser which I use it to share some code. But I want this class BaseUser to be internal in the a.b.c. Such that, I can create User:BaseUser in a.b.c. But the user of package can’t refer a.b.c.BaseUser. I tried the protected modifier. Not work, when I try to build, it said This type is final, so it cannot be inherited from, Cannot access 'BaseUser': it is protected in 'a.b.c' and 'public' subclass exposes its 'protected (in ?)' supertype BaseUser.

No luck with internal too

How to make this work? 🤔

[groostav]

you cant make this work like your thinking, if you make object X public, then its entire superclass tree must also be public in kotlin

[albertgao]

Thanks.

[gildor]

Use composition instead of inheritance to dothat

[albertgao]

@gildor Thanks. More hints for this? 😄

[gildor]

Do not extend class, but create an instance of private class inside of your public class and delegate method calls