fessConfig.setSuggestDocuments(isCheckboxEnabled(form.suggestDocuments));
        fessConfig.setPurgeSuggestSearchLogDay(form.purgeSuggestSearchLogDay);
        fessConfig.setLdapProviderUrl(form.ldapProviderUrl);
        fessConfig.setLdapSecurityPrincipal(form.ldapSecurityPrincipal);
        fessConfig.setLdapAdminSecurityPrincipal(form.ldapAdminSecurityPrincipal);

    }

    default String getLdapSecurityAuthentication() {
        return getSystemProperty(Constants.LDAP_SECURITY_AUTHENTICATION, "simple");
    }

    default void setLdapProviderUrl(final String value) {
        setSystemProperty(Constants.LDAP_PROVIDER_URL, value);
    }

    default String getLdapProviderUrl() {
        return getSystemProperty(Constants.LDAP_PROVIDER_URL);
    }