docs: private void loadAndExpand(Object itemId, I_CmsOuTreeType type) {
  
          if (type.isOrgUnit()) {
              addChildrenForOUNode((CmsOrganizationalUnit)itemId);
          }
          if (type.isGroup()) {
              addChildrenForGroupsNode(type, (String)itemId);
          }
          if (type.isRole()) {
              addChildrenForRolesNode((String)itemId);
          }
          expandItem(itemId);
      }