System.out.println("getSource=>" + diagmarkup);
SourceStringReader reader = new SourceStringReader(diagmarkup);
int n = index == null ? 0 : Integer.parseInt(index);
List<BlockUml> blocks = reader.getBlocks();
BlockUml block = blocks.get(n);
Diagram diagram = block.getDiagram();
UmlSource umlSrc = diagram.getSource();
String uml = umlSrc.getPlainString();
System.out.println("uml=" + uml);
// generate the response
DiagramResponse dr = new DiagramResponse(response, getOutputFormat());