gtk/gtk.go
func (v *Box) SetOrientation(o Orientation) {
	C.gtk_orientable_set_orientation(v.toOrientable(), C.GtkOrientation(o))
}
func (v *Box) SetOrientation(o Orientation) {
	C.gtk_orientable_set_orientation(v.toOrientable(), C.GtkOrientation(o))
}
// SetOrientation() is a wrapper around C.gtk_orientable_set_orientation() for a GtkBox