SwitchStatement.kt

fun calculateCost(vehicle: Vehicle): Money {
    return when (vehicle) {
        is CAR -> {
            CalculateCarCost(vehicle)
        }
        is MOTORBIKE -> {
            CalculateMotorbikeCost(vehicle)
        }
        is VAN -> {
            CalculateVanCost(vehicle)
        }
        is LORRY -> {
            CalculateLorryCost(vehicle)
        }
    }
}