code: func SortTags(tags map[string]string) [][]string {
  	keys := make([]string, len(tags))
  	result := make([][]string, len(tags))
  	i := 0
  	for k := range tags {
  		keys[i] = k
  		i++
  	}
  	sort.Strings(keys)
  	for i, k := range keys {
  		result[i] = []string{k, tags[k]}
  	}
  	return result
  }
docs: // SortTags turns a map[string]string into a slice of key/values, sorted by key.