supplierSpendDeferredBeforeDate method
Implementation
num supplierSpendDeferredBeforeDate(int herderId, DateTime date) {
return where((t) => t.contactId == herderId)
.where((t) => t.status == true)
.where((t) => t.date.isBefore(date))
.where((t) => t.ticketType == TicketType.spendDeferred)
.fold(0.0, (prev, e) => prev + e.totalCostTaxAndPromoIncluded);
}