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