public override void Cancel(CopyMachine copyMachine)
 {
     ConsolePrintHelper.WriteLineLabel("Печать отменена.");
     copyMachine.State = new ReturnDeliveryState();
     copyMachine.State.ReturnDelivery(copyMachine);
 }
 public override void SayGoodbye(CopyMachine copyMachine)
 {
     copyMachine.State = null;
     ConsolePrintHelper.WriteLineLabel("До свидания!");
 }