/**
* Get root nodes
* @return array
*/
public function getRootNodes()
{
$filter = new DoctrineSearchCondition();
$filter->levelEqualsTo(0);
$order = new DoctrineSelectOrder();
$order->byLeftAscending();
$rootNodes = $this->nestedSetRepository->search($filter, $order);
return $rootNodes;
}
/**
* Prepare object to be processed by garbage collector by removing it's
* instance from the Doctrine Repository Array Helper object
* @param EntityNodeInterface $entity
*/
public function free(EntityNodeInterface $entity)
{
$this->repository->free($entity);
$this->repository = null;
}