pkg/sysregistriesv2/system_registries_v2.go
func (e *Endpoint) RewriteReference(ref reference.Named, prefix string) (reference.Named, error) {
	if ref == nil {
		return nil, fmt.Errorf("provided reference is nil")
	}
	if prefix == "" {
		return ref, nil
	}
	refString := ref.String()
	if refMatchesPrefix(refString, prefix) {
		newNamedRef := strings.Replace(refString, prefix, e.Location, 1)
		newParsedRef, err := reference.ParseNamed(newNamedRef)
		if newParsedRef != nil {
			logrus.Debugf("reference rewritten from '%v' to '%v'", refString, newParsedRef.String())
		}
		if err != nil {
			return nil, errors.Wrapf(err, "error rewriting reference")
		}
		return newParsedRef, nil
	}

	return nil, fmt.Errorf("invalid prefix '%v' for reference '%v'", prefix, refString)
}
func (e *Endpoint) RewriteReference(ref reference.Named, prefix string) (reference.Named, error) {
	if ref == nil {
		return nil, fmt.Errorf("provided reference is nil")
	}
	if prefix == "" {
		return ref, nil
	}
	refString := ref.String()
	if refMatchesPrefix(refString, prefix) {
		newNamedRef := strings.Replace(refString, prefix, e.Location, 1)
		newParsedRef, err := reference.ParseNamed(newNamedRef)
		if newParsedRef != nil {
			logrus.Debugf("reference rewritten from '%v' to '%v'", refString, newParsedRef.String())
		}
		if err != nil {
			return nil, errors.Wrapf(err, "error rewriting reference")
		}
		return newParsedRef, nil
	}

	return nil, fmt.Errorf("invalid prefix '%v' for reference '%v'", prefix, refString)
}
// RewriteReference will substitute the provided reference `prefix` to the
// endpoints `location` from the `ref` and creates a new named reference from it.
// The function errors if the newly created reference is not parsable.