In support to blog post https://codewithshabib.com/2017/02/05/introduction-to-strategy-pattern/

SmartFlyingCar.swift

protocol Flyable {
    func flyOnAir()
}

class SmartFlyingCar: SmartCar, Flyable {
    func flyOnAir() {
        print("Wohoo! I am flying high!")
    }
}