1. Import

lib/model/device_object.dart

@@ -0,0 +1,18 @@
+import 'package:isar/isar.dart';
+import 'package:json_annotation/json_annotation.dart';
+
+part 'device_object.g.dart';
+
+@JsonSerializable()
+class DeviceObject {
+  late String model;
+  late String manufacturer;
+  late String os;
+  late String osVer;
+
+  DeviceObject();
+
+  factory DeviceObject.fromJson(Map<String, dynamic> json) => _$DeviceObjectFromJson(json);
+
+  Map<String, dynamic> toJson() => _$DeviceObjectToJson(this);
+}