Creates a new #GtkRadioButton. To be of any practical value, a widget should then be packed into the radio button.
an existing radio button group, or %NULL if you are creating a new group.
Return: a new radio button
ConstructionException GTK+ fails to create the object.
See Implementation
Creates a new #GtkRadioButton. To be of any practical value, a widget should then be packed into the radio button.