ostree/ostree_src.go
func (s *ostreeImageSource) Close() error {
	if s.repo != nil {
		C.g_object_unref(C.gpointer(s.repo))
	}
	return nil
}
func (s *ostreeImageSource) Close() error {
	if s.repo != nil {
		C.g_object_unref(C.gpointer(s.repo))
	}
	return nil
}
// Close removes resources associated with an initialized ImageSource, if any.