public void AddBeverageBase(BeverageCommand Beverage)
 {
     if (Beverage.IsCold())
     {
         Cold.Add(Beverage);
     }
     else
     {
         Hot.Add(Beverage);
     }
 }
 public void AddBeverage(BeverageCommand Beverage)
 {
     MachineState = MachineState.AddBeverage(Beverage);
 }