class Brand { final String id; final String brandName; Brand({ required this.id, required this.brandName, }); factory Brand.fromJson(Map json) { return Brand( id: json['_id'], brandName: json['brandName'], ); } Map toJson() { return { '_id': id, 'brandName': brandName, }; } @override String toString() { return 'Brand(id: $id, brandName: $brandName,)'; } }