libmachine/mcndockerclient/docker_host.go
func (rd *RemoteDocker) URL() (string, error) {
	if rd.HostURL == "" {
		return "", fmt.Errorf("Docker Host URL not set")
	}

	return rd.HostURL, nil
}
func (rd *RemoteDocker) URL() (string, error) {
	if rd.HostURL == "" {
		return "", fmt.Errorf("Docker Host URL not set")
	}

	return rd.HostURL, nil
}
// URL returns the Docker host URL