public function checkIntegrity()
 {
     $resources = $this->resourceNodeRepo->findAll();
     $batchSize = 500;
     $i = 0;
     foreach ($resources as $resource) {
         if ($resource->getWorkspace() === null && ($parent = $resource->getParent())) {
             if ($workspace = $parent->getWorkspace()) {
                 $resource->setWorkspace($workspace);
                 $this->om->persist($workspace);
                 $this->log('Set workspace ' . $workspace->getName() . ' for ' . $resource->getName());
                 ++$i;
                 if ($batchSize % $i === 0) {
                     $this->om->flush();
                 }
             }
         }
     }
     $this->om->flush();
 }