private DriverSelector createOverlaySelector(DatabaseDriverServerCache driverCache) {
OverlayContainer container = WidgetUtils.getOverlayContainerAncestor(setDriverButton);
if (container == null) {
return null;
}
OverlayDriverSelector selector = new OverlayDriverSelector(serverManager, driverCache, container);
selector.setFocusReceiverWhenClosed(setDriverButton);
return selector;
}