private function doCleanup($unchecked)
    {
        $tracker = $this->tracker;
        /* @var \PhpGuard\Listen\Resource\TrackedObject $tracked */
        foreach($unchecked as $id=>$tracked){
            $origin = $tracked->getResource();
            if(!$origin->isExists()){
                $tracker->addChangeSet($tracked,FilesystemEvent::DELETE);
                $tracker->remove($tracked);
            }
            unset($unchecked[$id]);
        }
    }