code: public function indexAction() {
      $settings = $this->settings;
  
      $primaryItems     = [];
      $primaryItemsUids = GeneralUtility::intExplode(',', $settings['primaryItems'], true);
  
      foreach($primaryItemsUids as $uid) {
        $primaryItems[] = $this->quickNavigationItemRepository->findByUid($uid);
      }
  
      $secondaryItems     = [];
      $secondaryItemsUids = GeneralUtility::intExplode(',', $settings['secondaryItems'], true);
  
      foreach($secondaryItemsUids as $uid) {
        $secondaryItems[] = $this->quickNavigationItemRepository->findByUid($uid);
      }
  
      $this->view->assign('settings', $settings);
      $this->view->assign('primaryItems', $primaryItems);
      $this->view->assign('secondaryItems', $secondaryItems);
    }
docs: The index action.