transports/stub.go
func (s stubTransport) ParseReference(reference string) (types.ImageReference, error) {
	return nil, fmt.Errorf(`The transport "%s:" is not supported in this build`, string(s))
}
func (s stubTransport) ParseReference(reference string) (types.ImageReference, error) {
	return nil, fmt.Errorf(`The transport "%s:" is not supported in this build`, string(s))
}
// ParseReference converts a string, which should not start with the ImageTransport.Name prefix, into an ImageReference.