code: func normalizedImageName(name string) string {
  	if strings.LastIndex(name, ":") <= strings.LastIndex(name, "/") {
  		name = name + ":" + parsers.DefaultImageTag
  	}
  	return name
  }
docs: // normalizedImageName returns the CRI compliant name for a given image.
  // TODO: cover the corner cases of missed matches, e.g,
  // 1. Using Docker as runtime and docker.io/library/test:tag in pod spec, but only test:tag will present in node status
  // 2. Using the implicit registry, i.e., test:tag or library/test:tag in pod spec but only docker.io/library/test:tag
  // in node status; note that if users consistently use one registry format, this should not happen.