fun testD(x: Comparable<Double>, y: Comparable<Double>): Boolean {
  return when {
    when {
      x is Double -> y is Double
      else -> false
    } -> less(arg0 = x /*as Double */, arg1 = y /*as Double */)
    else -> false
  }
}

fun testF(x: Comparable<Float>, y: Comparable<Float>): Boolean {
  return when {
    when {
      x is Float -> y is Float
      else -> false
    } -> less(arg0 = x /*as Float */, arg1 = y /*as Float */)
    else -> false
  }
}