/**
  * Fetches the data from the wrapper.
  *
  * @param string $uri
  * @param string $wrapperName
  * @param string $modelUri
  *
  * @return array
  */
 private function _getData($uri, $wrapperName, $modelUri)
 {
     try {
         $wrapper = $this->_wrapperRegistry->getWrapperInstance($wrapperName);
         $wrapperResult = $wrapper->run($uri, $modelUri);
         if (is_array($wrapperResult) && isset($wrapperResult['add'])) {
             $wrapperResult = $wrapperResult;
         } else {
             $wrapperResult = array();
         }
     } catch (Exception $e) {
         $wrapperResult = array();
     }
     return $wrapperResult;
 }