code: @Override
    protected Options getOptions() {
      final Options options = super.getOptions();
  
      final Option filenameOption =
          new Option("f", "the name of the csv output file, default name is " + DEFAULT_FILENAME
              + " [optional]");
      filenameOption.setArgName("FILENAME");
      filenameOption.setLongOpt("filename");
      filenameOption.setRequired(false);
      filenameOption.setArgs(1);
  
      options.addOption(filenameOption);
  
      return options;
  
    }
docs: Get the options.
  
  @return the specific CrawlToCsv options