Used to specify options for lookup_icon() .
|1||Gtk::ICON_LOOKUP_NO_SVG||Never return SVG icons, even if gdk-pixbuf supports them. This flag cannot be used in conjunction with Gtk::ICON_LOOKUP_FORCE_SVG.|
|2||Gtk::ICON_LOOKUP_FORCE_SVG||Return SVG icons, even if gdk-pixbuf doesn't support them. This flag cannot be used together with Gtk::ICON_LOOKUP_NO_SVG.|
|4||Gtk::ICON_LOOKUP_USE_BUILTIN||When passed to lookup_icon() includes builtin icons as well as files. For a built-in icon, get_filename() returns null and you need to call get_builtin_pixbuf() .|