docs: private List<String> getGroups(String dn) throws WIMException {
          List<String> grpList = new ArrayList<String>();
          String filter = iLdapConfigMgr.getGroupMemberFilter(dn);
          String[] searchBases = iLdapConfigMgr.getGroupSearchBases();
          for (int i = 0; i < searchBases.length; i++) {
              String searchBase = searchBases[i];
              NamingEnumeration<SearchResult> nenu = iLdapConn.search(searchBase, filter, SearchControls.SUBTREE_SCOPE,
                                                                      LDAP_ATTR_OBJECTCLASS_ARRAY);
              while (nenu.hasMoreElements()) {
                  SearchResult thisEntry = nenu.nextElement();
                  if (thisEntry == null) {
                      continue;
                  }
                  String entryName = thisEntry.getName();
                  if (entryName == null || entryName.trim().length() == 0) {
                      continue;
                  }
                  grpList.add(LdapHelper.prepareDN(entryName, searchBase));
              }
          }
          return grpList;
      }