code: public function getForeignDataItems()
      {
          if (!isset($this->_foreignDataItems)) {
              $this->_foreignDataItems = [];
              $this->trigger(self::EVENT_LOAD_FOREIGN_DATA_ITEMS);
          }
  
          return $this->_foreignDataItems;
      }
docs: Get foreign data items.
  
  @return [[@doctodo return_type:getForeignDataItems]] [[@doctodo return_description:getForeignDataItems]]