Brainstorm

storage_image_extension

class File
  __construct($filename)
    $this->workingCopy = new WorkingCopy($filename)
  hasWorkingCopy()
    return $this->workingCopy && $this->workingCopy->exists()
  getWorkingCopy()
    if (!$this->hasWorkingCopy())
      $this->workingCopy = new WorkingCopy(Storage::download($this->id))
    return $this->workingCopy

$image = new Image($parentImage)
$image->grab(200, 200)
$image->save()

$image = Image::mutate($parent_id) 
$image->grab(200, 200);
$image->save()

class Image
  __construct($image)
    $this->workingCopy = $image->download()

class ImageRepo
  mutate($id)
    return new Image($this->find($id))

Queue::wait($jobs[], $callback) // gearman sync jobs

wait()
  if (!$driver instanceof SyncQueue)
    throw new Exception