code: @Override
      boolean isKnownArgument(String arg) {
          return arg.equals(ARG_SERVER) || arg.equals(ARG_PASSWORD) ||
                 arg.equals(ARG_VALIDITY) || arg.equals(ARG_SUBJECT) ||
                 arg.equals(ARG_ENCODING) || arg.equals(ARG_KEY) ||
                 arg.equals(ARG_CREATE_CONFIG_FILE) || arg.equals(ARG_KEYSIZE) ||
                 arg.equals(ARG_CLIENT) || arg.equals(ARG_SIGALG);
      }
docs: {@inheritDoc}