Discount constructor
- String? identifier,
- double? price,
- String? priceString,
- String? currencyCode,
- required RovenuePeriod period,
- required int numberOfPeriods,
- required PaymentMode paymentMode,
- required DiscountType type,
Implementation
const Discount({
this.identifier,
this.price,
this.priceString,
this.currencyCode,
required this.period,
required this.numberOfPeriods,
required this.paymentMode,
required this.type,
});