FileUpload::addError PHP Method

    private function addError($name, $msg)
    {
        $this->_errors[$name] = $msg;
    }

 public static function validateFileSize(FileUpload $control, $limit)
 {
     $maxUploadSize = min(self::convertToBytes($limit), self::convertToBytes(ini_get("upload_max_filesize")));
     $file = $control->value;
     if (!$file instanceof HttpUploadedFile) {
         throw new InvalidStateException("File cannot be uploaded!");
     } elseif ($file->isOk()) {
         if ($file->getSize() > $maxUploadSize) {
             return FALSE;
         }
         return TRUE;
     } else {
         switch ($file->error) {
             case UPLOAD_ERR_INI_SIZE:
                 $errMsg = 'Velikost přílohy může být nanejvýš ' . TemplateHelpers::bytes($maxFileSize) . '.';
                 break;
             case UPLOAD_ERR_NO_FILE:
                 $errMsg = 'Nevybrali ste žiadny súbor.';
                 break;
                 /* 	tieto su hlavne na debug..userovi nic nepovedia	 */
             /* 	tieto su hlavne na debug..userovi nic nepovedia	 */
             case UPLOAD_ERR_FORM_SIZE:
                 $errMsg = 'The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form';
                 break;
             case UPLOAD_ERR_PARTIAL:
                 $errMsg = 'The uploaded file was only partially uploaded';
                 break;
             case UPLOAD_ERR_NO_FILE:
                 $errMsg = 'No file was uploaded';
                 break;
             case UPLOAD_ERR_NO_TMP_DIR:
                 $errMsg = 'Missing a temporary folder';
                 break;
             case UPLOAD_ERR_CANT_WRITE:
                 $errMsg = 'Failed to write file to disk';
                 break;
             case UPLOAD_ERR_EXTENSION:
                 $errMsg = 'File upload stopped by extension';
                 break;
             default:
                 $errMsg = 'Přílohu se nepodařilo nahrát.';
                 break;
         }
         $control->addError($errMsg);
         return FALSE;
     }
 }