*/
    public static String toString(final Document document) {
        assertArgumentNotNull("document", document);

        final StringBuilder buf = new StringBuilder(1000);
        appendElement(document.getDocumentElement(), buf);
        return new String(buf);
    }

    /**
     * Converts an {@link Element} to a string.
     *
     * @param element

        head.appendElement("link")
            .attr("rel", "stylesheet")
            .attr("href", "https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/github.min.css");

        head.appendElement("script")
            .attr("src", "https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/highlight.min.js");

        head.appendElement("script")
            .append("hljs.highlightAll();");