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//Mixing traits in type definition
class DoublePlusOneQueue extends IntQueueImpl with Incrementing with Doubling

object FilaComTrait extends App {
  val queue1 = new DoublePlusOneQueue
  queue1.put(1)
  queue1.put(2)
  println(queue1.get())
  println(queue1.get())

  //Mixing traits in object instantiation
  val queue2 = new IntQueueImpl with Filtering
  queue2.put(-1)
  queue2.put(1)
  println(queue2.size())
}