*/
    public static void appendAttrs(final NamedNodeMap attrs, final StringBuilder buf) {
        assertArgumentNotNull("attrs", attrs);
        assertArgumentNotNull("buf", buf);

        final int length = attrs.getLength();
        for (int i = 0; i < length; ++i) {
            final Attr attr = (Attr) attrs.item(i);
            buf.append(' ');
            appendAttr(attr, buf);
        }
    }