code: func ResourceNameFor(mapper meta.RESTMapper, o runtime.Object) string {
  	gvk := o.GetObjectKind().GroupVersionKind()
  	mapping, err := mapper.RESTMapping(gvk.GroupKind(), gvk.Version)
  	if err != nil {
  		log.Debugf("RESTMapper failed for %s: %s, falling back to kind", gvk, err)
  		return strings.ToLower(gvk.Kind)
  	}
  
  	return mapping.Resource.Resource
  }
docs: // ResourceNameFor returns a lowercase plural form of a type, for
  // human messages.  Returns lowercased kind if discovery lookup fails.