final Integer height = getAttributeAsInteger(attributes, "height");
                final Integer width = getAttributeAsInteger(attributes, "width");
                if (!fessConfig.isThumbnailHtmlImageUrl(thumbnailUrl)) {
                    continue;
                }
                if (height != null && width != null) {
                    try {

            }
            propMap.put(HTML_PROXY, proxy);
        }
        return proxy;
    }

    String getThumbnailHtmlImageExcludeExtensions();

    default boolean isThumbnailHtmlImageUrl(final String url) {
        if (StringUtil.isBlank(url)) {
            return false;
        }

        String[] excludeExtensions = (String[]) propMap.get(THUMBNAIL_HTML_IMAGE_EXCLUDE_EXTENSIONS);