function uploadLogo($file, Doctor $doctor, $flushObject = true)
 {
     $result = parent::uploadFile($file);
     if (is_object($result)) {
         $media = $result;
         $sizes = $this->getSizesByType(self::LOGO_TYPE_IMAGE);
         // Delete current logo
         $this->deleteMediaAndFiles($doctor->getMedia(), $sizes);
         // set newly uploaded logo
         $doctor->setMedia($media);
         $this->resize($media, $sizes, false);
         if ($flushObject) {
             $this->entityManager->persist($doctor);
             $this->entityManager->flush($doctor);
         }
         return $media;
     }
     return null;
 }