couponRedeem method Null safety

Future<CheckouCartSummaryModel> couponRedeem(
  1. {required String couponCode,
  2. required int addressId,
  3. required int loyaltyPoints,
  4. required int customerId,
  5. int? storeId}
)

It's used to apply coupon value

Implementation

Future<CheckouCartSummaryModel> couponRedeem(
    {required String couponCode,
    required int addressId,
    required int loyaltyPoints,
    required int customerId,
    int? storeId});