Prelude.Tree <iCS_EditorObject> BuildTreeNode(iCS_EditorObject nodeRoot, List <bool> filterFlags)
 {
     Prelude.Tree <iCS_EditorObject> tree = new Prelude.Tree <iCS_EditorObject>(nodeRoot);
     myIStorage.ForEachChild(nodeRoot,
                             c => {
         Prelude.Tree <iCS_EditorObject> newNode = BuildTreeNode(c, filterFlags);
         if (filterFlags[c.InstanceId])
         {
             tree.AddChild(newNode);
         }
     }
                             );
     tree.Sort(SortComparaison);
     return(tree);
 }