How to remove child Thumbnails from DeckView?

Question

I want to reuse Android Lollipop recent style library from vikramkakkar

I want to show only header bars stack with no thumbnails (app screenshots) attached to each one of it. How can I remove child thumbnails? Is there direct API to achieve this from library?.

Code

DeckChildViewThumbnail deckChildViewThumbnail = (DeckChildViewThumbnail) weakView.get().findViewById(R.id.task_view_thumbnail); 
deckChildViewThumbnail.setVisibility(View.GONE);