code: protected void fillItems(Collection<CmsQuickLaunchData> quickLaunchData) {
  
          Panel container = getItemContainer();
          container.clear();
          for (CmsQuickLaunchData item : quickLaunchData) {
              container.add(new QuickLaunchButton(item));
          }
      }
docs: Fills the quick launch menu with buttons corresponding to the given quick launch beans.<p>
  
  @param quickLaunchData the list of quick launch beans