private static void CleanChanges(ModelEntity rules)
{
var graph = GraphExplorer.FromRoot(rules);
var conditions = graph.OfType <TypeAllowedAndConditions>().SelectMany(a => a.Conditions).ToList();
conditions.ForEach(con => graph.UnionWith(GraphExplorer.FromRoot(con)));
GraphExplorer.CleanModifications(graph);
GraphExplorer.SetDummyRowIds(graph);
}