code: public void addingService(ServiceReference<WebApplicationFactory<?>> reference, WebApplicationFactory<?> service) {
          PaxWicketApplicationFactory internalFactory =
              PaxWicketApplicationFactory.createPaxWicketApplicationFactory(context, service, reference);
          addApplication(reference, internalFactory);
      }
docs: <p>addingService.</p>
  
  @param reference a {@link org.osgi.framework.ServiceReference} object.
  @param service a {@link org.ops4j.pax.wicket.api.WebApplicationFactory} object.