code: @Override
      public final void modifiedService(ServiceReference<PageFactory<? extends IRequestablePage>> reference,
              PageFactory<? extends IRequestablePage> service) {
          String appName = (String) reference.getProperty(APPLICATION_NAME);
          if (!applicationName.equals(appName)) {
              paxWicketPageFactory.remove(service);
          }
      }
docs: {@inheritDoc}
  
  Default implementation of the
  <code>ServiceTrackerCustomizer.modifiedService</code> method.
  
  <p>
  This method is only called when this <code>ServiceTracker</code> object
  has been constructed with a <code>null ServiceTrackerCustomizer</code>
  argument.
  
  The default implementation does nothing.
  
  @see org.osgi.util.tracker.ServiceTrackerCustomizer