Warning
gtk_icon_factory_lookup_default has been deprecated since version 3.10 and should not be used in newly-written code. Use GtkIconTheme instead.
Looks for an icon in the list of default icon factories. For
display to the user, you should use gtk_style_lookup_icon_set() on
the GtkStyle for the widget that will display the icon, instead of
using this function directly, so that themes are taken into
account.
Warning gtk_icon_factory_lookup_default has been deprecated since version 3.10 and should not be used in newly-written code. Use GtkIconTheme instead. Looks for an icon in the list of default icon factories. For display to the user, you should use gtk_style_lookup_icon_set() on the GtkStyle for the widget that will display the icon, instead of using this function directly, so that themes are taken into account.