Download all attachments

gistfile1.txt

function downloadAllFiles(notification)
{
  var card = new Notification(notification).addedLabel("Download").card();
  var folder = DriveApp.createFolder(card.id());
  
  card.attachments().each(function(att)
  {
    var file = Trellinator.downloadFileToGoogleDrive(att.link());
    folder.addFile(file);
  });
  
  card.attachLink({name: "All Attachments",link: folder.getUrl()});
}