eZ\Publish\Core\Persistence\Legacy\Content\Location\Gateway::cleanupTrash PHP Method

    public abstract function cleanupTrash();

 /**
  * Empties the trash
  * Everything contained in the trash must be removed
  *
  * @return void
  */
 public function emptyTrash()
 {
     $trashedItems = $this->findTrashItems();
     foreach ($trashedItems as $item) {
         $this->delete($item);
     }
     $this->locationGateway->cleanupTrash();
 }