code: public function failedForGroup($group, int $start = 0, int $limit = 25): array
      {
          $results = json_decode($this->client->failed($group, $start, $limit), true);
  
          if (isset($results['jobs']) && !empty($results['jobs'])) {
              $results['jobs'] = $this->multiget($results['jobs']);
          }
  
          return is_array($results) ? $results : [];
      }
docs: Fetches a report of failed jobs for the specified group
  
  @param string|bool $group
  @param int         $start
  @param int         $limit
  
  @return array