toJson method Null safety

Map<String, dynamic> toJson()

Implementation

Map<String, dynamic> toJson() => {
      "id": id,
      "customerID": customerId,
      "firstName": firstName,
      "lastName": lastName,
      "address": address,
      "building": building,
      "floor": floor,
      "apartment": apartment,
      "postalCode": postalCode,
      "mobile": mobile,
      "isDefault": isDefault,
      "name": name,
      "zoneID": zoneId,
      "latitude": latitude,
      "longitude": longitude,
      "locationUrl": locationUrl,
      "city": city == null ? null : city!.toJson(),
      "orderCount": orderCount,
    };