code: func GetCharsetInfo(cs string) (string, string, error) {
  	c, ok := charsets[strings.ToLower(cs)]
  	if !ok {
  		return "", "", errors.Errorf("Unknown charset %s", cs)
  	}
  	return c.Name, c.DefaultCollation.Name, nil
  }
docs: // GetCharsetInfo returns charset and collation for cs as name.