Payment constructor

Payment({
  1. int? paymentDate,
  2. PaymentType? paymentType,
  3. double? paid,
})

Implementation

Payment({
		int? paymentDate,
		PaymentType? paymentType,
		double? paid
	}) : paymentDate = paymentDate ?? 0,
	paymentType = paymentType ?? null,
	paid = paid ?? null;