toJson method Null safety

Map<String, dynamic> toJson()

Implementation

Map<String, dynamic> toJson() => {
      "id": id,
      "name": name,
      "description": description,
      "itemType": itemType,
      "code": code,
      "items": items == null
          ? null
          : List<dynamic>.from(items!.map((x) => x.toJson())),
    };