code: func attachSdcGUID(plug *sioPlugin, conf map[string]string) error {
  	guid, err := getSdcGUIDLabel(plug)
  	if err != nil {
  		return err
  	}
  	conf[confKey.sdcGUID] = guid
  	return nil
  }
docs: // attachSdcGUID injects the sdc guid node label value into config