code: func HandleInjectionError(p api.VolumeSpec, err error) error {
  	if err == nil {
  		return nil
  	}
  	if strings.Contains(err.Error(), "no such file or directory") {
  		glog.Errorf("The destination directory for %q injection must exist in container (%q)", p.Source, p.Destination)
  		return err
  	}
  	glog.Errorf("Error occurred during injecting %q to %q: %v", p.Source, p.Destination, err)
  	return err
  }
docs: // HandleInjectionError handles the error caused by injection and provide
  // reasonable suggestion to users.