fun asas() {
    val b = B()
    val result: Int = b("asas1", "asas2")
}

interface Merger1<T1 : Any, T2 : Any, R : Any> {
    val merge: (T1, T2) -> R
}

class A : Merger1<String, String, Int> {
    override val merge: (asas1: String, asas2: String) -> Int
        get() = TODO()
}

fun asasA() {
    val a = A()
    val result: Int = a.merge("asas1", "asas2")
}