func (s *prefixPipeline) AssetUrl(name string) (url string, err error) {
	url, err = s.AssetPipeline.AssetUrl(name)
	if err == nil {
		url = s.prefix + url
	}

	return
}
func (s *prefixPipeline) AssetUrl(name string) (url string, err error) {
	url, err = s.AssetPipeline.AssetUrl(name)
	if err == nil {
		url = s.prefix + url
	}

	return
}
// add the prefix when providing urls