docs: public static Map<CmsUUID, CmsUser> addExportAllUsers(CmsObject cms, String ou, Map<CmsUUID, CmsUser> exportUsers)
      throws CmsException {
  
          List<CmsUser> users = OpenCms.getOrgUnitManager().getUsers(cms, ou, false);
          if ((users != null) && (users.size() > 0)) {
              Iterator<CmsUser> itUsers = users.iterator();
              while (itUsers.hasNext()) {
                  CmsUser user = itUsers.next();
                  if (!exportUsers.containsKey(user.getId())) {
                      exportUsers.put(user.getId(), user);
                  }
              }
          }
          return exportUsers;
      }