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kotlinlang

Hey guys :slightly_smiling_face: I want to design a fluent interface but it seems as if the variance of Kotlin/JVM is not good enough for creating actual DRY code; or maybe I'm missing something?

```
sealed class A {
    fun a() = apply { /* doSomething */ }
}

class B : A() {
    fun b() = apply { /* doSomething */ }
}

class C : A() {
    fun c() = apply { /* doSomething */ }
}

B().a().b() // cannot call b() now :(
C().a().c() // cannot call c() now :(
```

Does this work for you?
```
B().apply { a() }.b()
```