public void Service(Car car)
{
//Some services need to be done explicitly and in order choosen by the garage
Console.WriteLine("servicing tire pressure..");
Console.WriteLine("servicing oil..");
//Some services can be done 'indirectly or forwarded to external parties' but still in order choosen by the garage
//Performing Extra Service, but which? The garage does not need to control that
//if (ExtraService != null)
//{
// ExtraService(car);
//}
//Line below ias same as if-statement above, just a null check
ExtraService?.Invoke(car);
Console.WriteLine("cleaning interior");
//A window servicing company could actually travel in real life to the garage and perform services on site
WindowService?.Invoke(car);
//As an ending service: the car needs to be washed
Console.WriteLine("washing car");
}
