code: public function dictionaryItemsList($dictionaryId)
      {
          $url = $this->_getApiServiceUri(). 'dictionary/'.$dictionaryId.'/items';
          $result = $this->_fetch($url, \Zend_Http_Client::GET);
  
          return $result;
      }
docs: Get dictionary item list
  
  @param $dictionaryId
  @return bool|mixed
  @throws LocalizedException