return LaRequestUtil.getOptionalRequest().map(req -> {
            @SuppressWarnings("unchecked")
            final Map<String, String> labelValueMap = (Map<String, String>) req.getAttribute(Constants.LABEL_VALUE_MAP);
            if (labelValueMap != null) {
                return labelValueMap.get(value) != null;
            }
            return false;
        }).orElse(false);
    }

    /**

    /** View parameter for geo form data. */
    public static final String GEO_FORM = "fess.GeoForm";

    /** View parameter for label value mapping. */
    public static final String LABEL_VALUE_MAP = "fess.LabelValueMap";

    /** Query parameter name for main search query. */
    public static final String OPTION_QUERY_Q = "q";

    /** Query parameter name for constraint query. */