code: function processFileResponse(req, res, next) {
    var fileDetails = req.appformsResultPayload.data;
    if (fileDetails.stream) {
      var headers = {};
      headers["Content-Type"] = fileDetails.type;//Setting the file content type. Mime types are set by the file handler.
      headers["Content-Disposition"] = "attachment; filename=" + fileDetails.name;
      res.writeHead(200, headers);
      fileDetails.stream.pipe(res);
      fileDetails.stream.resume(); //Unpausing the stream as it was paused by the file handler
    } else {
      return next('Error getting submitted file - result: ' + JSON.stringify(fileDetails));
    }
  }
docs: Function for handling a file response. Used when loading files from a submission
  
  @param req
  @param res
  @param next