final LayoutPanel layoutPanel = getLayoutPanel();
layoutPanel.add(scrollPanel);
scrollPanel.add(columnView, new BoxLayoutData(FillStyle.VERTICAL));
columnView.add(resizeHotSpot, new ColumnLayoutData("20em"));
// TODO move to CSS {
Style style = scrollPanel.getElement().getStyle();
style.setPaddingTop(0, Unit.PX);
style.setPaddingRight(0, Unit.PX);