toJson method Null safety

Map<String, dynamic> toJson()

Implementation

Map<String, dynamic> toJson() => {
      "items": items == null
          ? null
          : List<dynamic>.from(items!.map((x) => x.toJson())),
      "summary": summary == null
          ? null
          : List<dynamic>.from(summary!.map((x) => x.toJson())),
      "address": address == null ? null : address!.toJson(),
      "paymentOption": paymentOption == null ? null : paymentOption!.toJson(),
      "total": total,
      "configDeliveryPeriod": configDeliveryPeriod == null
          ? null
          : configDeliveryPeriod!.toJson(),
    };