default void setLoginRequired(final boolean value) {
        setSystemPropertyAsBoolean(Constants.LOGIN_REQUIRED_PROPERTY, value);
    }

    default boolean isLoginRequired() {
        return getSystemPropertyAsBoolean(Constants.LOGIN_REQUIRED_PROPERTY, false);
    }

    default void setResultCollapsed(final boolean value) {
        setSystemPropertyAsBoolean(Constants.RESULT_COLLAPSED_PROPERTY, value);
    }

            // pre-authenticate
            authenticator = new org.codelibs.spnego.SpnegoAuthenticator(config);

            fessConfig.setSystemPropertyAsBoolean(SPNEGO_INITIALIZED, true);
            fessConfig.storeSystemProperties();
            return authenticator;
        } catch (final Exception e) {