class Listener1Assist implements ListenerAssist,
        ListenerModelHandler.ModelCreator<Listener1Assist.Listener1Model> {

    public void downloadFromBreakpoint(DownloadTask task, @NonNull BreakpointInfo info) {
        final Listener1Model model = modelHandler.getOrRecoverModel(task, info);
        if (model == null) return;
        model.onInfoValid(info);

        model.isStarted = true;
        model.isFromResumed = true;
        model.isFirstConnect = true;
    }

    public  Listener1Assist();
      Listener1Assist(ListenerModelHandler<Listener1Model> handler);

}