Subscripts (indexer methods) with multiple parameters in Swift

class Car {
    var model: String
    var year: Int
    var price: Int
    
    init(_ model: String_ year: Int_ price: Int) {
        self.model = model
        self.year = year
        self.price = price
    }
}

class ToyotaPrices {
    private var cars: [Car] = [Car]()
    
    subscript(model: String, year: Int) -> Int {
        get {
            if let car = getCar(model, year) {
                return car.price
            }
            return 0
        }
        set {
            if let car = getCar(model, year) {
                car.price = newValue
            }
            let car = Car(model, year, newValue)
            cars.append(car)
        }
    }
    
    private func getCar(model: String_ year: Int) -> Car? {
        let arCars = cars.filter(
            {$0.model == model && $0.year == year})
        if arCars.count == 0 {
            return nil
        }
        return arCars[0]
    }
}

let prices = ToyotaPrices()
prices["Rush"2012] = 16818;
prices["Land Cruiser"2014] = 54988

let priceRAV4 = prices["RAV4"2015]
//priceRAV4 is 0
let priceRush = prices["Rush"2012]
//priceRush is 16818