class UserBackupManagerService {

    public int requestBackup(String[] packages, IBackupObserver observer, int flags) {
        return requestBackup(packages, observer, null, flags);
    }

    private  UserBackupManagerService(
            @UserIdInt int userId,
            Context context,
            Trampoline parent,
            HandlerThread userBackupThread,
            File baseStateDir,
            File dataDir,
            TransportManager transportManager);

}