gtk:radio-menu-item-new-with-label-from-widget (group label)

group -- a list of gtk:radio-menu-item widgets with the radio group to which the radio menu item is to be attached or nil
label -- a string with the text for the label

A new gtk:radio-menu-item widget.

Creates a new radio menu item whose child is a simple gtk:label widget. The new radio menu item is added to the same group as group.