protected @Nullable
    T getItem(int position) {
        if (position == 0) {
            return null;
        }
        return mList.get(position - 1);
    }
Get the item at the designated position in the adapter.

@param position of item in adapter
@return null if position is zero (that means it's the ".." header), the item otherwise.
android/modules/module_filepicker/src/main/java/com/nononsenseapps/filepicker/FileItemAdapter.java