code: public function pagePicker(ManipulateWidgetEvent $event)
      {
          if (!$this->scopeDeterminator->currentScopeIsBackend()
              || !('tl_metamodel_rendersettings' === $event->getEnvironment()->getDataDefinition()->getName())
              || !((0 === strpos($event->getProperty()->getName(), 'jumpTo'))
                   && ('[value]' === substr($event->getProperty()->getName(), -\strlen('[value]'))))
          ) {
              return;
          }
  
          $environment = $event->getEnvironment();
  
          $pickerUrl = $this->pickerBuilder->getUrl('cca_link');
  
          $urlEvent = new GenerateHtmlEvent(
              'pickpage.svg',
              $environment->getTranslator()->translate('MSC.pagepicker'),
              'style="vertical-middle:top;cursor:pointer"'
          );
  
          $environment->getEventDispatcher()->dispatch(ContaoEvents::IMAGE_GET_HTML, $urlEvent);
  
          $template = new ContaoBackendViewTemplate('dc_general_wizard_link_url_picker');
          $template
              ->set('name', $event->getWidget()->name)
              ->set('popupUrl', $pickerUrl)
              ->set('html', ' ' . $urlEvent->getHtml())
              ->set('label', $event->getProperty()->getLabel()[1])
              ->set('id', $event->getWidget()->id);
  
          $event->getWidget()->wizard = $template->parse();
      }
docs: Return the link picker wizard - this is called from Multi column wizard in render settings jumpTo page handling.
  
  @param ManipulateWidgetEvent $event The event.
  
  @return void