If list model support function property would be better.

Hi guys,

    I want to add a model to my repeater, and want to add a function property to each element.  The document says that from Qt 5.11 , ListElement support this feature. it's true. 

But only static ListModel support this. If I want to add new ListElement to the model, it will be failed. Please see the demo. I want to ListModel support adding element with function property  dynamically  .