private static void fillMaps() throws IOException {
    Logger log = Logger.getInstance(UnsupportedFeaturesUtil.class.getName());
    try (FileReader reader = new FileReader(PythonHelpersLocator.findPathInHelpers("/tools/versions.xml"))) {
      XMLReader xr = XMLReaderFactory.createXMLReader();
      VersionsParser parser = new VersionsParser();
      xr.setContentHandler(parser);
      xr.parse(new InputSource(reader));
    }
    catch (SAXException e) {
      log.error("Improperly formed \"versions.xml\". " + e.getMessage());
    }
  }
private static void fillMaps()