});
panel.add(toggleTraffic);
final Label changeLabel = new Label();
panel.add(changeLabel);
initWidget(panel);
trafficInfo = new TrafficOverlay();
trafficInfo.addTrafficOverlayChangedHandler(new TrafficOverlayChangedHandler() {
public void onChanged(TrafficOverlayChangedEvent event) {
changeLabel.setText("Last Changed: " + new Date());
}