code: public List<$.T2<String, String>> options(CommanderClassMetaInfo classMetaInfo, AppClassLoader classLoader) {
          List<$.T2<String, String>> retVal = new ArrayList<>();
          for (CommandParamMetaInfo param : params) {
              OptionAnnoInfoBase opt = param.optionInfo();
              if (null != opt) {
                  retVal.add($.T2(opt.leads(), opt.help()));
              }
          }
          for (OptionAnnoInfoBase opt : classMetaInfo.fieldOptionAnnoInfoList(classLoader)) {
              retVal.add($.T2(opt.leads(), opt.help()));
          }
          return retVal;
      }
docs: Returns {@link CliHandler#options()}
  @return options list
  @see CliHandler#options()