protected function findNextFreeIndexInParentPath($parentPath)
{
if (!isset($this->highestIndexCache[$parentPath])) {
/** @var \Doctrine\ORM\Query $query */
$query = $this->entityManager->createQuery('SELECT MAX(n.index) FROM Neos\\ContentRepository\\Domain\\Model\\NodeData n WHERE n.parentPathHash = :parentPathHash');
$query->setParameter('parentPathHash', md5($parentPath));
$this->highestIndexCache[$parentPath] = $query->getSingleScalarResult() ?: 0;
}
$this->highestIndexCache[$parentPath] += 100;
return $this->highestIndexCache[$parentPath];
}