Inheritance: extends PartKeepr\UploadedFileBundle\Services\UploadedFileService
 protected function replaceFile(UploadedFile $target, UploadedFile $source)
 {
     if ($target instanceof Image) {
         $this->imageService->replaceFromUploadedFile($target, $source);
     } else {
         $this->uploadedFileService->replaceFromUploadedFile($target, $source);
     }
     $target->setDescription($source->getDescription());
 }