code: public HandlerChainsType<ServiceRefType<T>> getOrCreateHandlerChains()
     {
        Node node = childNode.getOrCreate("handler-chains");
        HandlerChainsType<ServiceRefType<T>> handlerChains = new HandlerChainsTypeImpl<ServiceRefType<T>>(this, "handler-chains", childNode, node);
        return handlerChains;
     }
docs: If not already created, a new <code>handler-chains</code> element with the given value will be created.
  Otherwise, the existing <code>handler-chains</code> element will be returned.
  @return  a new or existing instance of <code>HandlerChainsType<ServiceRefType<T>></code>