docs: public void checkFolders(Set<String> folders) {
  
          if (folders != null) {
              for (String folder : folders) {
                  CmsLazyTreeItem item = m_itemsByPath.get(folder);
                  if ((item != null) && (item.getCheckBox() != null)) {
                      item.getCheckBox().setChecked(true);
                  }
              }
          }
  
      }