Enhance QQmlListProperty to use a QList of QSharedPointer objects

Here's a very basic example of a class sharing out a list of QObjects:

Class Foo : public QObject
{
  Q_OBJECT
  Q_PROPERTY(QQmlListProperty<QObject> bars READ bars)

public:
  QQmlListProperty<QObject> bars() {return QQmlListProperty<QObject>(this, myBars);}

private:
  QList<QObject*> myBars;
}

Now, it would be GREAT if QQmlListProperty knew about smart pointers... so that my private variable could be instead:

QList<QSharedPointer<QObject> > myBars;

I ran into this issue because I'm trying to access the list in QML and in C++, so I'm having to write two getter functions. I would of liked to return a shared pointer out without having to write within the function add-hock clones of the data, and instead the data itself already be protected by a smart pointer.