splitLayoutPanel.setWidgetToggleDisplayAllowed(east, true);
splitLayoutPanel.setWidgetToggleDisplayAllowed(west, true);
splitLayoutPanel.setWidgetSnapClosedSize(south, 40);
splitLayoutPanel.setWidgetToggleDisplayAllowed(south, true);
splitLayoutPanel.addLayoutResizeHandler(new PLayoutResizeHandler() {
@Override
public void onLayoutResize(final PLayoutResizeEvent resizeEvent) {
for (final LayoutResizeData data : resizeEvent.getLayoutResizeData()) {
if (data.w == south) {