pizza-pitfall.ts

type MargheritaToppings = {
    mushrooms?: boolean;
    olives?: boolean;
    onion?: boolean;
    basil?: boolean;
};

type MargheritaCheeses = {
    mozzarella?: boolean;
    parmesan?: boolean;
};

type BasePizzaCheeses = {
    feta: boolean;
};

class Pizza<T, C = BasePizzaCheeses> {
    addToppings(toppings: T) {}
    addCheeses(cheeses: C) {}
}

class PizzaMargherita extends Pizza<MargheritaToppings, MargheritaCheeses> {}