public async void UpdateProductInCart(Product product, int newQuantity)
        {
            BasketItem basketItem = await PetShopDatabase.GetProductFromCart(product.Id);

            basketItem.Quantity = newQuantity;

            PetShopDatabase.UpdateInCart(basketItem);
        }
        public async void RemoveProductFromCart(Product product)
        {
            BasketItem basketItem = await PetShopDatabase.GetProductFromCart(product.Id);

            PetShopDatabase.RemoveFromCart(basketItem);
        }