write a program in which use the inheritance and design the pizza menu

class Pizza {
  String pizza_name;
  int price;
  Pizza(this.pizza_name, this.price);

  void showInfo() {
    print('Pizza name: $pizza_name,\t price: $price');
  }
}

class PizzaWithExtraCheese extends Pizza {
  int extraCheese_price;
  PizzaWithExtraCheese(String pizza_name, int price, this.extraCheese_price)
      : super(pizza_name, price);

  @override
  void showInfo() {
    print(
        'Pizza name: $pizza_name,\t price: $price,\t extra cheese price: $extraCheese_price ');
  }
}

class PizzaWithExtraToppings extends Pizza {
  int toppings_price;
  PizzaWithExtraToppings(
      String pizza_name, int price, this.toppings_price)
      : super(pizza_name, price);

  @override
  void showInfo() {
    print(