CouponInfo.fromJson constructor Null safety
Implementation
factory CouponInfo.fromJson(Map<String, dynamic> json) => CouponInfo(
hasCoupon: json["hasCoupon"],
couponCode: json["couponCode"],
);
factory CouponInfo.fromJson(Map<String, dynamic> json) => CouponInfo(
hasCoupon: json["hasCoupon"],
couponCode: json["couponCode"],
);