Is it possible to make no difference of order, when to call `onEvent'?

HighOrder.scala

import io.reactors.Events


object HighOrder extends App{

  var want1 = 0
  var want1Too = 0

  val have0 = new Events.Emitter[Int]

  val factory = new Events.Emitter[Events[Int]]

  val mux = factory.mux

  val map = mux.map(x => x + 1)

  map.onEvent(x => want1 = x)

  factory.react(have0)

  map.onEvent(x => want1Too = x)

  have0.react(0)
  assert(want1 == 1)
  assert(want1Too == 1)

}