toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (deliverByDate != null) 'deliverByDate': deliverByDate!,
if (lineItemId != null) 'lineItemId': lineItemId!,
if (operationId != null) 'operationId': operationId!,
if (productId != null) 'productId': productId!,
if (shipByDate != null) 'shipByDate': shipByDate!,
};