Znajdź błąd: Flutter

1class PriceCalculator {
2  List<double> applyDiscount(List<double> prices, double discount) {
3    for (int i = 0; i < prices.length; i++) {
4      prices[i] = prices[i] * (1 - discount);
5    }
6    return prices;
7  }
8}
9
10void main() {
11  final original = [10.0, 20.0, 30.0];
12  final calc = PriceCalculator();
13  final discounted = calc.applyDiscount(original, 0.1);
14  print(original);
15}