import 'package:json_annotation/json_annotation.dart'; part 'session_identifier.g.dart'; @JsonSerializable() class SessionIdentifier { final String clientId; final String deviceId; const SessionIdentifier({ required this.clientId, required this.deviceId, }); factory SessionIdentifier.fromJson(Map json) => _$SessionIdentifierFromJson(json); Map toJson() => _$SessionIdentifierToJson(this); }