private void handleThisEnvelopeNode(EnvelopeNode envNode)
        {
            int envelopeID = envNode.EnvelopeID;

            foreach (var item in DBquery.getSubEnvelopeBalances(envelopeID))
            {
                AENode node = new AENode(item.ID, envelopeID, item.Name, item.SubBalance);
                node.ImageId = (int)NodeImage.Bank;
                envNode.Nodes.Add(node);
            }
        }