interface I1 {

}

interface I2 {

}

operator fun I1.component1(): Int {
  return 1
}

operator fun I2.component2(): String {
  return ""
}

fun test(x: I1) {
  when {
    x !is I2 -> return Unit
  }
  val <destruct>: I1 = x /*as I2 */
  val c1: Int = <destruct> /*as I2 */.component1()
  val c2: String = <destruct> /*as I2 */.component2()
}