gtk/icon_view.go
func (v *IconView) SetItemOrientation(orientation Orientation) {
	C.gtk_icon_view_set_item_orientation(v.native(), C.GtkOrientation(orientation))
}
func (v *IconView) SetItemOrientation(orientation Orientation) {
	C.gtk_icon_view_set_item_orientation(v.native(), C.GtkOrientation(orientation))
}
// SetItemOrientation is a wrapper around gtk_icon_view_set_item_orientation().