code: func TruncateID(id string) string {
  	shortLen := 12
  	if len(id) < shortLen {
  		shortLen = len(id)
  	}
  	return id[:shortLen]
  }
docs: // TruncateID returns a shorten id
  // Following two functions are from github.com/docker/docker/utils module. It
  // was way overkill to include the whole module, so we just have these bits
  // that we're using here.