code: public static Option create() throws IllegalArgumentException
      {
          if (longopt == null)
          {
              OptionBuilder.reset();
              throw new IllegalArgumentException("must specify longopt");
          }
  
          return create(null);
      }
docs: Create an Option using the current settings
  
  @return the Option instance
  @throws IllegalArgumentException if <code>longOpt</code> has not been set.