Newscoop\Entity\Attachment::getExtension PHP Метод

    public function getExtension()
    {
        return $this->extension;
    }

 /**
  * Get new attachment file name
  *
  * @param Attachment $attachment
  *
  * @return string
  */
 private function getFileName(Attachment $attachment)
 {
     if ($attachment->getId()) {
         $fileName = sprintf('%09d', $attachment->getId());
     } else {
         $fileName = sprintf('%09d', 0);
     }
     if ($attachment->getExtension()) {
         $fileName .= '.' . $attachment->getExtension();
     }
     return $fileName;
 }