public function populateDefaults($elements = 'all')
 {
     $log = '';
     if ($elements == 'all') {
         $elements = $this->ElementService->findAll()->getResults();
     } else {
         $elementSlugs = StringUtils::smartExplode($elements);
         $elements = array();
         foreach ($elementSlugs as $eSlug) {
             $elements[] = $this->ElementService->getBySlug($eSlug);
         }
     }
     foreach ($elements as $element) {
         $offset = 0;
         $nq = new NodeQuery();
         $nq->setParameter('Elements.in', $element->getSlug());
         $nq->setParameter('Meta.select', 'all');
         $nq->setLimit(1000);
         $nq->setOffset($offset);
         $nq->asObjects();
         $nq->isRetrieveTotalRecords(true);
         $nq = $this->NodeService->findAll($nq, true);
         $nodes = $nq->getResults();
         $tCount = $nq->getTotalRecords();
         $count = 0;
         while (count($nodes) > 0) {
             foreach ($nodes as $node) {
                 $this->NodeMapper->defaultsOnNode($node);
                 $this->NodeService->edit($node);
                 ++$count;
             }
             $offset += 1000;
             $nq = new NodeQuery();
             $nq->setParameter('Elements.in', $element->getSlug());
             $nq->setParameter('Meta.select', 'all');
             $nq->setLimit(1000);
             $nq->setOffset($offset);
             $nq->asObjects();
             $nodes = $this->NodeService->findAll($nq)->getResults();
         }
         $log .= 'Updated defaults on ' . $count . ' of ' . $tCount . ' ' . $element->getSlug() . " nodes.\n";
     }
     return $log;
 }