Undostack (QAction and all QUndo* classes) in QtQuick application

Hi all, I’m still researching on how i could migrate my desktop application from QWidget to full QtQuick 2 application. Now I’m stuck on porting QUndoStack and QAction classes which I believed would be in QtCore module, but I discovered they are still in QtWidget module !! How do you do a Undostack in QML ? Is QML Action component not linked at all to QAction class ? Is something like playground project UiHelpers going to make its way to Add-on modules ? (http://qt-project.org/wiki/Qt-5-Ui-Helpers) Thanks