/**
  * @return string
  */
 public function getFilename()
 {
     return $this->file->getFilename();
 }
 /**
  * @param \Diamante\DeskBundle\Model\Attachment\File $file
  * @return string
  */
 private function generateFileHash(File $file)
 {
     return md5($file->getFilename() . time());
 }