toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (itemRevenue != null) 'itemRevenue': itemRevenue!,
if (productName != null) 'productName': productName!,
if (productQuantity != null) 'productQuantity': productQuantity!,
if (productSku != null) 'productSku': productSku!,
};