docs: public static void main(String[] args) throws Exception {
      Options options = new Options();
      HelpFormatter hf = new HelpFormatter();
      hf.setWidth(100);
      options.addOption(
          Option.builder("i")
              .argName("in_path")
              .longOpt("input-file")
              .hasArg()
              .required()
              .desc("path to target jar/aar file")
              .build());
      options.addOption(
          Option.builder("p")
              .argName("pkg_name")
              .longOpt("package")
              .hasArg()
              .desc("qualified package name")
              .build());
      options.addOption(
          Option.builder("o")
              .argName("out_path")
              .longOpt("output-file")
              .hasArg()
              .required()
              .desc("path to processed jar/aar file")
              .build());
      options.addOption(
          Option.builder("h")
              .argName("help")
              .longOpt("help")
              .desc("print usage information")
              .build());
      options.addOption(
          Option.builder("d")
              .argName("debug")
              .longOpt("debug")
              .desc("print debug information")
              .build());
      options.addOption(
          Option.builder("v").argName("verbose").longOpt("verbose").desc("set verbosity").build());
      try {
        CommandLine line = new DefaultParser().parse(options, args);
        if (line.hasOption('h')) {
          hf.printHelp(appName, options, true);
          return;
        }
        String jarPath = line.getOptionValue('i');
        String pkgName = line.getOptionValue('p', "");
        String outPath = line.getOptionValue('o');
        boolean debug = line.hasOption('d');
        boolean verbose = line.hasOption('v');
        if (!pkgName.isEmpty()) {
          pkgName = "L" + pkgName.replaceAll("\\.", "/");
        }
        DefinitelyDerefedParamsDriver.run(jarPath, pkgName, outPath, debug, verbose);
        if (!new File(outPath).exists()) {
          System.out.println("Could not write jar file: " + outPath);
        }
      } catch (ParseException pe) {
        hf.printHelp(appName, options, true);
      }
    }