code: public static FormatOptions of(String format) {
      if (checkNotNull(format).equals(CSV)) {
        return csv();
      } else if (format.equals(DATASTORE_BACKUP)) {
        return datastoreBackup();
      } else if (format.equals(GOOGLE_SHEETS)) {
        return googleSheets();
      } else if (format.equals(BIGTABLE)) {
        return bigtable();
      }
      return new FormatOptions(format);
    }
docs: Default options for the provided format.