code: public static void main(String[] args) {
      final PrintWriter out = new PrintWriter(System.out);
      final PrintWriter err = new PrintWriter(System.err);
      final int code = Launcher.main2(out, err, Arrays.asList(args));
      System.exit(code);
    }
docs: Entry point from the operating system command line.
  
  <p>Calls {@link System#exit(int)} with the following status codes:
  <ul>
  <li>0: success</li>
  <li>1: invalid arguments</li>
  <li>2: help</li>
  </ul>
  
  @param args Command-line arguments