code: func (a APIObjectVersioner) ObjectResourceVersion(obj runtime.Object) (uint64, error) {
  	accessor, err := meta.Accessor(obj)
  	if err != nil {
  		return 0, err
  	}
  	version := accessor.GetResourceVersion()
  	if len(version) == 0 {
  		return 0, nil
  	}
  	return strconv.ParseUint(version, 10, 64)
  }
docs: // ObjectResourceVersion implements Versioner