public function fire()
 {
     $onlyForModel = ucfirst($this->argument('model'));
     foreach (Media::all() as $media) {
         if ($onlyForModel == '' || $onlyForModel == $media->content_type) {
             MediaLibrary::regenerateDerivedFiles($media);
             $this->info('Media id ' . $media->id . ' "' . $media->path . '" reprocessed' . ' (for ' . $media->content_type . ' id ' . $media->content_id . ')');
         }
     }
     $this->info('All done!');
 }