demo/xinhuaribao/lib/model/system_info_model.dart

class SystemInfoModel {
  SystemInfoModel({num? isGray}) {
    _isGray = isGray;
  }

  SystemInfoModel.fromJson(dynamic json) {
    _isGray = json['isGray'];
  }

  num? _isGray;

  SystemInfoModel copyWith({num? isGray}) =>
      SystemInfoModel(isGray: isGray ?? _isGray);

  num? get isGray => _isGray;

  Map<String, dynamic> toJson() {
    final map = <String, dynamic>{};
    map['isGray'] = _isGray;
    return map;
  }
}