Add method setModel(ListModel model) to Radiogroup class

When the list of items (radios) is dynamic there is no method setModel. I think it's a serious problem

A listbox and its items are updated when the model changes. That is great!
Also it is quite similar for comboboxes, listboxes, trees, grids etc. In all cases
we have a model and a renderer, but I do not know something similar for radiogroups.