public UpdateContainer undoIt(Workspace workspace) {
Node node = workspace.getFactory().getNode(nodeIdArg);
SuperSelection sel = getSuperSelection(workspace);
node.setValue(previousValue, previousStatus, workspace.getFactory());
UpdateContainer uc = WorksheetUpdateFactory.createWorksheetHierarchicalAndCleaningResultsUpdates(worksheetId, sel);
uc.add(new NodeChangedUpdate(worksheetId,
nodeIdArg, previousValue, previousStatus));
return uc;
}