gistfile1.txt

interface A {
    fun foo()
}

class AImpl: A {
    override fun foo() {
        print("A")
    }
}

interface B {
    fun bar()
}

class BImpl(private val a: A): B {
    override fun bar() {
        print("B")
    }
}

class C(
    val a: A,
    val b: B,
)