public SWTBotToolbarDropDownButton toolbarDropDownButton(String tooltip) throws WidgetNotFoundException {
SWTBotToolbarButton abstractButton = toolbarButton(tooltip);
if (abstractButton instanceof SWTBotToolbarDropDownButton)
return (SWTBotToolbarDropDownButton) abstractButton;
throw new WidgetNotFoundException("Unable to find toolitem with the given tooltip '" + tooltip + "'"); //$NON-NLS-1$ //$NON-NLS-2$
}