gtk/gtk.go
func (v *Box) GetSpacing() int {
	c := C.gtk_box_get_spacing(v.native())
	return int(c)
}
func (v *Box) GetSpacing() int {
	c := C.gtk_box_get_spacing(v.native())
	return int(c)
}
// GetSpacing() is a wrapper around gtk_box_get_spacing().