private static void dumpPipelineTree(StringBuffer sb, PipelineTreeConfig pipelineTree) {
   List elements = pipelineTree.getHandlerOrChain();
   for (Object element : elements) {
     if (element instanceof HandlerConfig) {
       dumpHandler(sb, (HandlerConfig) element, "");
     } else if (element instanceof ChainConfig) {
       ChainConfig chain = (ChainConfig) element;
       sb.append("\tChain=" + chain.getName());
       if (chain.getPresence() != null) sb.append(" presence=" + chain.getPresence().toString());
       sb.append(NL);
       for (HandlerConfig handler : chain.getHandler()) {
         sb.append("\t");
         dumpHandler(sb, handler, "");
       }
     }
   }
 }