class Data { String version; String name; Data.fromJson(Map json) : version = json['version'], name = json['name']; @override String toString() { return 'name: $name ,version: $version'; } } class Version { Data data; int status; bool success; Version.formJson(Map json) : status = json['status'], success = json['success'], data = Data.fromJson(json['data']); @override String toString() { return 'status: $status ,success: $success,date: ${data.toString()}'; } }