/**
  * Update exisitng short link
  * 
  * @action update
  * @param string $id
  * @param KalturaShortLink $shortLink
  * @return KalturaShortLink
  *
  * @throws KalturaErrors::INVALID_OBJECT_ID
  */
 function updateAction($id, KalturaShortLink $shortLink)
 {
     $dbShortLink = ShortLinkPeer::retrieveByPK($id);
     if (!$dbShortLink) {
         throw new KalturaAPIException(KalturaErrors::INVALID_OBJECT_ID, $id);
     }
     $dbShortLink = $shortLink->toUpdatableObject($dbShortLink);
     $dbShortLink->save();
     $shortLink->fromObject($dbShortLink);
     return $shortLink;
 }