code: func getKubernetesAddress(args flags.Uris) (*url.URL, error) {
  	for _, uri := range args {
  		if strings.SplitN(uri.Key, ".", 2)[0] == "kubernetes" {
  			return &uri.Val, nil
  		}
  	}
  	return nil, fmt.Errorf("No kubernetes source found.")
  }
docs: // Gets the address of the kubernetes source from the list of source URIs.
  // Possible kubernetes sources are: 'kubernetes' and 'kubernetes.summary_api'