* Appends the string representation of a {@link CDATASection}.
     *
     * @param cdataSection
     *            The CDATA section. Must not be {@literal null}.
     * @param buf
     *            The string buffer. Must not be {@literal null}.
     */
    public static void appendCDATASection(final CDATASection cdataSection, final StringBuilder buf) {
        assertArgumentNotNull("cdataSection", cdataSection);