new AttributesImpl());
postProcess.startElement("", "diff", "diff", new AttributesImpl());
HtmlSaxDiffOutput output = new HtmlSaxDiffOutput(postProcess,
prefix);
HTMLDiffer differ = new HTMLDiffer(output);
differ.diff(ancestorComparator, leftComparator, rightComparator);
postProcess.endElement("", "diff", "diff");
postProcess.endElement("", "diffreport", "diffreport");
postProcess.endDocument();