Dart - The basics in pratice

shopping_cart.dart

class ShoppingCart {
  List<Product> _products = [];
  List<Product> get products => this._products;

  void addItem(Product product){
    this.products.add(product);
  }

  double total() {
    double total = 0;

    this.products.forEach((Product p) {
      total += p.price;
    });

    return total;
  }
}