protected IEnumerator<object> GenerateNewGraph(List<DeltaInfo> newListItems, GraphKeyType keyType)
{
var newGraph = new StackGraph(keyType);
yield return newGraph.Build(Instance, newListItems);
StackGraph = newGraph;
GraphHistogram.Items = StackGraph.Functions.OrderedItems.ToArray();
GraphTreemap.Items = StackGraph.OrderedItems.ToArray();
GraphHistogram.Invalidate();
GraphTreemap.Refresh();
}