final Object siteValue = docMap.get(fessConfig.getIndexFieldSite());
        if (siteValue != null) {
            final String site = siteValue.toString();
            final int size = fessConfig.getResponseMaxSitePathLengthAsInteger();
            if (size > 3) {
                return StringUtils.abbreviate(site, size);
            }
            if (size >= 0) {
                return site;
            }
        }

     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     * @throws NumberFormatException When the property is not integer.
     */
    Integer getResponseMaxSitePathLengthAsInteger();

    /**
     * Get the value for the key 'response.highlight.content_title.enabled'. <br>
     * The value is, e.g. true <br>