// Before introducing promises, each of these functions required a callback to be passed in to it.
// This leads to deeply nested structures and the arrow-anti-pattern, creating more visual complexity
// and reducing the maintainability of this code

Tiles.getImagesForTile(function(images){
  Tiles.buildThumnails(images, function(thumbnails){
    Tiles.transmogrify(thumbnails, function(notification){
      updater.update(notification);
    }
  });
});