Как сделать первый элемент в RecyclerView+StaggeredGridLayoutManager на всю ширину экрана?

private View createLayoutParams(View targetView) {
        StaggeredGridLayoutManager.LayoutParams params;
        params = new StaggeredGridLayoutManager.LayoutParams(StaggeredGridLayoutManager.LayoutParams.MATCH_PARENT, StaggeredGridLayoutManager.LayoutParams.WRAP_CONTENT);
        params.setFullSpan(true);
        targetView.setLayoutParams(params);
        return targetView;
    }