DOM.setStyleAttribute(messageLabel.getElement(), "marginTop", "10px");
SimpleButton singleModelButton = new SimpleButton("Set Single Line Selection", new ClickHandler() {
public void onClick(ClickEvent event) {
SingleRowSelectionModel model = new SingleRowSelectionModel();
model.addListener(new SingleRowSelectionModel.Listener() {
public void selectionCleared() {
messageLabel.setText("Selection cleared.");
}
public void rowSelected(int row, SingleRowSelection selection) {