return thumbnailUri.toString();
                    }
                }
            }

            final XPathNodes imgNodeList = getXPathAPI().selectNodeList(document, fessConfig.getThumbnailHtmlImageXpath());
            String firstThumbnailUrl = null;
            for (int i = 0; i < imgNodeList.size(); i++) {
                final Node imgNode = imgNodeList.get(i);
                if (logger.isDebugEnabled()) {

     * The value is, e.g. //IMG <br>
     * comment: XPath to select images for thumbnails.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getThumbnailHtmlImageXpath();

    /**
     * Get the value for the key 'thumbnail.html.image.exclude.extensions'. <br>
     * The value is, e.g. svg,html,css,js <br>