code: public String format(Description d) {
      String s = (d != null) ? d.value() : null;
      if (isNullOrEmpty(s)) return "";
      return String.format("[%s] ", s);
    }
docs: Formats the given <code>{@link Description}</code> by surrounding its text value with square brackets and adding a space at
  the end.
  @param d the description to format. It can be {@code null}.
  @return the formatted description, or an empty {@code String} if the the {@code Description} is {@code null}.