private int getHeaderHeight() {
        if (mStickiedHeader != null) {
            return mStickiedHeader.getMeasuredHeight();
        }
        return 0;
    }
If set to true, headers will ignore horizontal padding.

@param b if true, horizontal padding is ignored by headers
Library/src/com/tonicartos/widget/stickygridheaders/StickyGridHeadersGridView.java