Decorator Pattern in Swift

In this video you will find explanation of a decorator pattern and its implementation in Swift.
Decorator is a structural pattern that allows adding new behaviors to objects dynamically by placing them inside special wrapper objects, called decorators.
Using decorators you can wrap objects countless number of times since both target objects and decorators follow the same interface. The resulting object will get a stacking behavior of all wrappers.
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[@nagarajvrao7249]

It would be more meaningful if we use class for decorator. we are upgrading the same car, we are not creating a new car each time we upgrade. Isn't it?

[@nijatnamazzade7413]

any Car' cannot be constructed because it has no accessible initializers