It would be very useful to have some kind of directive/tag/attribute in the
typesystem to indicate whether an object being passed as argument to a method
should have its reference count increased.

Example: QAbstractItemView.setModel(QAbstractItemModel*). While it requires the
existence of the model as long as the view is alive, the view does *not* take
ownership of the model, as it can be used by many views.

And also this would increase the "pythonization" index of PySide, as these
functions would behave just like normal python functions that keep reference of
the argument :)

PS: for shiboken too