code: func LoadCAUniqueIDToCNMap(c context.Context) (map[int64]string, error) {
  	ent := CAUniqueIDToCNMap{}
  	switch err := ds.Get(c, &ent); {
  	case err == ds.ErrNoSuchEntity:
  		return nil, nil
  	case err != nil:
  		return nil, transient.Tag.Apply(err)
  	}
  	dec := gob.NewDecoder(bytes.NewReader(ent.GobEncodedMap))
  	out := map[int64]string{}
  	if err := dec.Decode(&out); err != nil {
  		return nil, err
  	}
  	return out, nil
  }
docs: // LoadCAUniqueIDToCNMap loads CAUniqueIDToCNMap from the datastore.