class A(y: Int) {
    var x = y
}

var A.z: Int
    get() = this.x
    set(value: Int) {
        this.x = value
    }

fun main(args: Array<String>) {
    val p1 = A::z
    val a = A(42)
    p1.set(a, 117)
    println(a.x)
    println(p1.get(a))
    val p2 = a::z
    p2.set(42)
    println(a.x)
    println(p2.get())
}