protected final void updateInsertIndexInChildrenOfNode(DynamicNode parentNode)
     throws DbException {
   Enumeration childrenEnum = parentNode.children();
   while (childrenEnum.hasMoreElements()) {
     DynamicNode node = (DynamicNode) childrenEnum.nextElement();
     DbObject dbo = (DbObject) node.getRealObject();
     DbObject dbParent = dbo.getComposite();
     node.insertIndex = getSequence(dbParent, dbo);
   }
 }