docs: public static List<Object> lookupAttributeValues(LdapOperations ldapOperations, Name dn, String attribute) {
          List<Object> values = loopForAllAttributeValues(ldapOperations, dn, new String[]{attribute}).getValues(attribute);
          if(values == null) {
              values = Collections.emptyList();
          }
  
          return values;
      }