FILE: common.kt
    public open expect class A : R|kotlin/Any| {
        public constructor(): R|A| {
            super<R|kotlin/Any|>()
        }

        public final fun foo(): R|kotlin/Unit|

    }
    public open class B : R|A| {
        public constructor(): R|B| {
            super<R|A|>()
        }

    }