docs: private static void searchForJars(final File file, List<File> jars) {
      if (file.isFile()) {
        if (file.getAbsolutePath().toLowerCase().endsWith(".jar")) {
          jars.add(file);
          LOG.debug("Found a jar: " + file.getAbsolutePath());
        }
      } else if (file.isDirectory()) {
        File[] files = file.listFiles();
        if (files == null) {
          // if this is null, it's due to a security issue
          LOG.warn("Access denied to directory: " + file.getAbsolutePath());
        } else {
          for (File f : files) {
            searchForJars(f, jars);
          }
        }
      }    
    }