code: func updateAnnotations(existing, ref *v1.Pod) {
  	annotations := make(map[string]string, len(ref.Annotations)+len(localAnnotations))
  	for k, v := range ref.Annotations {
  		annotations[k] = v
  	}
  	for _, k := range localAnnotations {
  		if v, ok := existing.Annotations[k]; ok {
  			annotations[k] = v
  		}
  	}
  	existing.Annotations = annotations
  }
docs: // updateAnnotations returns an Annotation map containing the api annotation map plus
  // locally managed annotations