Store QList<QObject*> as ListElement data in ListModel

[Tadinu]

I am using QList<QObject*> cppObjectList as a context property in my QML module.

My ListElement form is as follows:

ListElement {
      _childList: cppObjectList 
}

Or
Using ListModel's setProperty(<element_index>, "_childList", cppObjectList ) to set the cppObjectList to _childList

Then I try printing the _childList (through model._childList) inside my ListView delegate, it just outputs undefined.
So, anyone knows the reason why or just I cannot do that?

By the way, I can totally do like this:

Item {
      id: item
      property var _objectList

      function setObjectList() {
               _objectList = cppObjectList; // cppObjectList is set as QQmlContext property as QVariant.
      }
}

then use item._objectList as model in my Listview, which is fine!

So, it seems that cppObjectList can only be set directly to Item's property var and cannot be used as data inside a ListElement, doesn't it?