Sets icon as the widget used as icon on button. If icon_widget is NULL the icon is determined by the stock-id property. If the stock-id property is also NULL, button will not have an icon.
the widget used as icon, or NULL
2.4
Sets icon as the widget used as icon on button. If icon_widget is NULL the icon is determined by the stock-id property. If the stock-id property is also NULL, button will not have an icon.