protected static function doCheckForDoubleReviews(\Widget $objWidget, $varValue, $strTable)
 {
     if ($strTable == 'tl_competition_review' && ($objReview = ReviewModel::findByPk(\Input::get('id'))) !== null) {
         $objReviews = \HeimrichHannot\Competition\ReviewModel::findOneBy(array('sid=?', 'jid=?', 'tl_competition_review.id!=?'), array($varValue, $objReview->jid, \Input::get('id')));
         // check for already existing reviews by the member for the current submission
         if ($objReviews !== null) {
             $objWidget->addError($GLOBALS['TL_LANG']['MSC']['reviewAlreadyExisting']);
         }
     }
 }