docs: public ChannelBuffer formatConfigV1(final Config config) {
      TreeMap<String, String> map = new TreeMap<String, String>(config.getMap());
      for (Map.Entry<String, String> entry : map.entrySet()) {
        if (entry.getKey().toUpperCase().contains("PASS")) {
          map.put(entry.getKey(), "********");
        }
      }
      return serializeJSON(map);
    }