/**
  * Prefetch the following keys if local cache is enabled, otherwise don't do anything
  *
  * @author Władysław Bodzek <*****@*****.**>
  * @param $keys array List of keys to prefetch
  */
 public function prefetch($keys)
 {
     global $wgEnableMemcachedBulkMode;
     if (empty($wgEnableMemcachedBulkMode)) {
         parent::prefetch($keys);
     }
     $this->getMultiInternal($keys, false);
 }