class SaleCartModel { SaleCartModel({ required this.productId, this.productCode, this.productType, required this.batchName, required this.stockId, this.productName, this.unitPrice, this.quantity = 1, this.itemCartIndex = -1, this.stock, this.productPurchasePrice, this.lossProfit, this.discountAmount, this.perItemTaxPercentage, this.productVatId, }); num productId; num stockId; String batchName; String? productType; String? productCode; String? productName; num? unitPrice; num? productPurchasePrice; num quantity = 1; int itemCartIndex; num? stock; num? lossProfit; num? discountAmount; num? perItemTaxPercentage; int? productVatId; }