code: public static void main(String[] args) throws IOException {
      if (args.length == 0 || args[0].equals("--help")) {
        help();
        return;
      }
      if (args[0].equals("--list")) {
        listFilesystems();
        return;
      }
      if (args[0].equals("--check")) {
        checkGcs();
        return;
      }
      for (String a : args) {
        statFile(a);
      }
    }
docs: See the class documentation.