toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (items != null) 'items': items!,
if (operationId != null) 'operationId': operationId!,
if (reason != null) 'reason': reason!,
if (reasonText != null) 'reasonText': reasonText!,
if (shipping != null) 'shipping': shipping!,
};