Passing QML component to C++ function

[mut]

Hello

http://doc.qt.io/qt-4.8/qml-component.html

I have a Q_INVOKABLE C++ function which must receive one QML component as a parameter.
What should be the parameter type of the C++ function?
When inside the C++ function, how to access the individual properties of the QML component?

Any example?

Thanks;

Mut