private BundleWiringDTO getBundleWiringDTO(BundleWiring wiring) {
   if (wiring == null) {
     return null;
   }
   BundleWiringDTO dto = new BundleWiringDTO();
   dto.bundle = wiring.getBundle().getBundleId();
   dto.root = getWiringId(wiring);
   dto.nodes = new HashSet<BundleWiringDTO.NodeDTO>(wiringnodes.values());
   dto.resources = new HashSet<BundleRevisionDTO>(resources.values());
   return dto;
 }