private HeaderFillerView getHeaderFillerView(int headerPosition, View convertView,
            ViewGroup parent) {
        HeaderFillerView headerFillerView = (HeaderFillerView)convertView;
        if (headerFillerView == null) {
            headerFillerView = new HeaderFillerView(mContext);
        }

        return headerFillerView;
    }
@return the adapter wrapped by this adapter.
Library/src/com/tonicartos/widget/stickygridheaders/StickyGridHeadersBaseAdapterWrapper.java