Neos\ContentRepository\Domain\Model\Node::isNodePathAvailable PHP Метод

    protected function isNodePathAvailable($path)
    {
        $existingNodeDataArray = $this->nodeDataRepository->findByPathWithoutReduce($path, $this->context->getWorkspace());
        $nonMatchingNodeData = array_filter($existingNodeDataArray, function (NodeData $nodeData) {
            return $nodeData->getIdentifier() !== $this->getIdentifier();
        });
        return $nonMatchingNodeData === [];
    }