public void run() {
AbstractDataTable data = createDataTable();
OrgChart.Options options = OrgChart.Options.create();
options.setSize(Size.LARGE);
OrgChart widget = new OrgChart(data, options);
widget.addCollapseHandler(new CollapseHandler() {
@Override
public void onCollapseEvent(CollapseEvent event) {
assertEquals(event.getCollapsed(), true);
assertEquals(event.getRow(), 1);
finishTest();