docs: private boolean addConfig(String section, String option, String value) {
          if (section.equals("")) {
              section = DEFAULT_SECTION;
          }
  
          if (!data.containsKey(section)) {
              data.put(section, new HashMap<>());
          }
  
          boolean ok = data.get(section).containsKey(option);
          data.get(section).put(option, value);
          return !ok;
      }