private List<ValidationStamp> readValidationStamps(JsonNode validationStampIds) {
   List<ValidationStamp> validationStampList;
   if (validationStampIds.isArray()) {
     List<Integer> ids = new ArrayList<>();
     validationStampIds.forEach(id -> ids.add(id.asInt()));
     // Reading the validation stamps and then the names
     validationStampList =
         ids.stream()
             .map(id -> structureService.getValidationStamp(ID.of(id)))
             .collect(Collectors.toList());
   } else {
     throw new AutoPromotionPropertyCannotParseException(
         "Cannot get the list of validation stamps");
   }
   return validationStampList;
 }
 List<FolderServerGroup> findGroups() {
   List<FolderServerGroup> groupList = new ArrayList<>();
   String cypher = CypherQueryBuilder.findGroups();
   CypherQuery q = new CypherQueryLiteral(cypher);
   JsonNode jsonNode = executeCypherQueryAndCommit(q);
   JsonNode userListJsonNode = jsonNode.at("/results/0/data");
   if (userListJsonNode != null && !userListJsonNode.isMissingNode()) {
     userListJsonNode.forEach(
         f -> {
           JsonNode groupNode = f.at("/row/0");
           if (groupNode != null && !groupNode.isMissingNode()) {
             FolderServerGroup cg = buildGroup(groupNode);
             groupList.add(cg);
           }
         });
   }
   return groupList;
 }
 List<FolderServerUser> findGroupMembers(String groupURL) {
   List<FolderServerUser> memberList = new ArrayList<>();
   String cypher = CypherQueryBuilder.getGroupUsersWithRelation(RelationLabel.MEMBEROF);
   Map<String, Object> params = CypherParamBuilder.matchGroupId(groupURL);
   CypherQuery q = new CypherQueryWithParameters(cypher, params);
   JsonNode jsonNode = executeCypherQueryAndCommit(q);
   JsonNode userListJsonNode = jsonNode.at("/results/0/data");
   if (userListJsonNode != null && !userListJsonNode.isMissingNode()) {
     userListJsonNode.forEach(
         f -> {
           JsonNode userNode = f.at("/row/0");
           if (userNode != null && !userNode.isMissingNode()) {
             FolderServerUser u = buildUser(userNode);
             memberList.add(u);
           }
         });
   }
   return memberList;
 }