code: func (d *SerialDriver) GetIP() (string, error) {
  	d.Lock()
  	defer d.Unlock()
  	return d.Driver.GetIP()
  }
docs: // GetIP returns an IP or hostname that this host is available at
  // e.g. 1.2.3.4 or docker-host-d60b70a14d3a.cloudapp.net