Method add

enums/CarWash.java:48–50

(Cycle cycle)

  EnumSet<Cycle> cycles =
    EnumSet.of(Cycle.BASIC, Cycle.RINSE);
  public void add(Cycle cycle) {
    cycles.add(cycle);
  }
  public void washCar() {
    for(Cycle c : cycles)
      c.action();