Dynamo.Graph.Workspaces.WorkspaceModel.RecordGroupModelBeforeUngroup C# (CSharp) Method

        internal void RecordGroupModelBeforeUngroup(AnnotationModel annotation)
        {
            using (undoRecorder.BeginActionGroup()) // Start a new action group.
            {
                undoRecorder.RecordModificationForUndo(annotation);
            }
        }