Creates a new GtkRadioToolButton, adding it to group. The new GtkRadioToolButton will contain an icon and label from the stock item indicated by stock_id. Since 2.4
an existing radio button group, or NULL if you are creating a new group. [allow-none]
the name of a stock item
ConstructionException GTK+ fails to create the object.
See Implementation
Creates a new GtkRadioToolButton, adding it to group. The new GtkRadioToolButton will contain an icon and label from the stock item indicated by stock_id. Since 2.4