adapter.submitData() not working in Java for android using paging 3

I am using PagingDataAdapter to build my recyclerview but somehow in the mainactivity android studio shows an error that submitData is not a function of the respective adapter.

this is my code for my in the MainActivity:

  viewModel = new ViewModelProvider(this ,
                ViewModelProvider.AndroidViewModelFactory.getInstance(getApplication()))
                .get(PhotoDataSourceFactory.class);
        Lifecycle lifecycle = getLifecycle();
        viewModel.setLifecycle(lifecycle);
        recyclerView = findViewById(R.id.recyclerView);
        PhotosAdapter adapter = new PhotosAdapter(Photos.CALLBACK);
        recyclerView.setAdapter(adapter);
        viewModel.getSearchResults().observe(this, listPagingData -> adapter.submitData(lifecycle, listPagingData));

My ViewModel :

public class PhotoDataSourceFactory extends ViewModel {
    Lifecycle lifecycle;
    private static final String TAG = "PhotoDataSourceFactory";
    public PhotoDataSourceFactory() {
    }

    public void setLifecycle(Lifecycle lifecycle){
        this.lifecycle = lifecycle;
    }

    public LiveData<PagingData<List<Photos>>> getSearchResults(){
        PagingConfig config = new PagingConfig(20, 100, false);
        Pager<Long , List<Photos>> pager = new Pager<>(config, new Function0<PagingSource<Long, List<Photos>>>() {
            @Override
            public PagingSource<Long, List<Photos>> invoke() {
                return new PhotoSource();
            }
        });
        return PagingLiveData.cachedIn(PagingLiveData.getLiveData(pager),lifecycle);
    }


}

My Adapter:

public class PhotosAdapter extends PagingDataAdapter<Photos , PhotosAdapter.PhotoViewHolder> {
    private static final String TAG = "PhotosAdapter";

    public PhotosAdapter(@NotNull DiffUtil.ItemCallback<Photos> diffCallback) {
        super(diffCallback);
    }

    @NonNull
    @Override
    public PhotoViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
        View view = layoutInflater.inflate(R.layout.list_photos,parent,false);
        return new PhotoViewHolder(view);
    }


    @Override
    public void onBindViewHolder(@NonNull PhotoViewHolder holder, int position) {

        Glide.with(holder.itemView.getContext()).load(getItem(position).getUrl()+".png").into(holder.photo);
        holder.textView.setText(getItem(position).getTitle());
    }

    public class PhotoViewHolder extends RecyclerView.ViewHolder{
        ImageView photo;
        TextView textView;
        public PhotoViewHolder(@NonNull View itemView) {
            super(itemView);
            photo = itemView.findViewById(R.id.imageView);
            textView = itemView.findViewById(R.id.textView);
        }

    }
}

and My PagingSource:

public class PhotoSource extends ListenableFuturePagingSource<Long , List<Photos>> {
    GetDataService dataService;
    private static final String TAG = "PhotoSource";
    @NotNull
    @Override
    public ListenableFuture<LoadResult<Long, List<Photos>>> loadFuture(@NotNull LoadParams<Long> loadParams) {
        Executor executor = Executors.newSingleThreadExecutor();
        dataService = RetrofitInstance.getInstance().create(GetDataService.class);
        Long currentPage = loadParams.getKey()!=null ? loadParams.getKey() : (long)1;
        ListenableFuture<List<Photos>> photos =  dataService.getAllPhotos(currentPage);
        ListenableFuture<LoadResult<Long , List<Photos>>> page  = Futures.transform(photos, new Function<List<Photos>, LoadResult<Long, List<Photos>>>() {
            @NullableDecl
            @Override
            public LoadResult.Page<Long, List<Photos>> apply(@NullableDecl List<Photos> input) {
                    return new LoadResult.Page<>(
                            Collections.singletonList(input),
                            currentPage  == 1 ? currentPage : currentPage-1,
                            input.isEmpty() ? null : currentPage+1
                    );
            }}, executor);
        Log.d(TAG, "loadFuture: Heererereree");
        ListenableFuture<LoadResult<Long , List<Photos>>> partialLoad = Futures.catching(page, HttpException.class, LoadResult.Error::new, executor);
        return Futures.catching(partialLoad, IOException.class, LoadResult.Error::new, executor);
    }

    @Nullable
    @Override
    public Long getRefreshKey(@NotNull PagingState<Long, List<Photos>> pagingState) {
        return null;
    }

}

I don't understand where i am going wrong , tried to search alot on stackoverflow but all in vain , I wasn't able to glean anything of substance from google's documentation on paging 3 in java to resolve this issue. tried to find videos on paging 3 in java but unfortunately no one has covered paging in Java.

if there's anyone who has done this (paging 3) in java please if possible add a link to your github too thanks in advance :)