docs: @Override
      protected void initializeProvider(InterceptorProvider provider, Bus bus) {
          if (LOG.isLoggable(Level.FINE)) {
              LOG.log(Level.FINE, "Resolving bus extensions for Request-Callback feature");
          }
          WSAddressingFeature addressing = new WSAddressingFeature();
          addressing.setAddressingRequired(true);
          addressing.initialize(provider, bus);
          if (LOG.isLoggable(Level.FINE)) {
              LOG.log(Level.FINE, "Initializing interceptors for Request-Callback feature");
          }
          final RequestCallbackInInterceptor inInterceptor = new RequestCallbackInInterceptor();
          final CallbackActionInterceptor cbInterceptor = new CallbackActionInterceptor();
          final RequestCallbackOutInterceptor outInterceptor = new RequestCallbackOutInterceptor();
          provider.getInInterceptors().add(inInterceptor);
          provider.getInInterceptors().add(cbInterceptor);
          provider.getOutInterceptors().add(outInterceptor);
      }