/**
  * @see GridHandler::loadData()
  */
 function &loadData($request, $filter)
 {
     // Go through the submission files and set their
     // "selected" flag.
     $submissionFiles =& parent::loadData($request, $filter);
     $selectedFiles =& $this->getSelectedFileIds();
     foreach ($submissionFiles as $fileId => $submissionFileData) {
         assert(isset($submissionFileData['submissionFile']));
         $monographFile =& $submissionFileData['submissionFile'];
         /* @var $monographFile MonographFile */
         $submissionFiles[$fileId]['selected'] = in_array($monographFile->getFileIdAndRevision(), $selectedFiles);
         unset($monographFile);
     }
     return $submissionFiles;
 }