class A {
    var prop: Int by Delegate()

    class Delegate {
        var inner = 1
        fun get(t: Any?, p: PropertyMetadata): Int = inner
        fun set(t: Any?, p: PropertyMetadata, i: Int) { inner = i }
    }
}

fun box(): String {
  val c = A()
  if(c.prop != 1) return "fail get"
  c.prop = 2
  if (c.prop != 2) return "fail set"
  return "OK"
}