/**
  * Cleans the facebbok username.
  *
  * @param PreUpdateEventArgs $args
  */
 public function preUpdate(PreUpdateEventArgs $args)
 {
     $entity = $args->getEntity();
     if ($entity instanceof Plugin && $entity->getNamespace() == 'Elcodi\\Plugin\\FacebookBundle\\ElcodiFacebookBundle') {
         $facebookAccount = $entity->getConfiguration()->getFieldValue('facebook_account');
         $entity->getConfiguration()->setFieldValue('facebook_account', $this->facebookUsernameCleaner->clean($facebookAccount));
     }
 }