Dynamo.Graph.Workspaces.WorkspaceModel.RecordModelsForUndo C# (CSharp) Метод

        internal static void RecordModelsForUndo(Dictionary<ModelBase, UndoRedoRecorder.UserAction> models, UndoRedoRecorder recorder)
        {
            if (null == recorder)
                return;
            if (!ShouldProceedWithRecording(models))
                return;

            using (recorder.BeginActionGroup())
            {
                foreach (var modelPair in models)
                {
                    switch (modelPair.Value)
                    {
                        case UndoRedoRecorder.UserAction.Creation:
                            recorder.RecordCreationForUndo(modelPair.Key);
                            break;
                        case UndoRedoRecorder.UserAction.Deletion:
                            recorder.RecordDeletionForUndo(modelPair.Key);
                            break;
                        case UndoRedoRecorder.UserAction.Modification:
                            recorder.RecordModificationForUndo(modelPair.Key);
                            break;
                    }
                }
            }
        }