/**
* @param Node $hierarchyDescription
* @return NodeAggregator
*/
private function buildAggregatorOfNodes(Node $hierarchyDescription)
{
return new NodeAggregator($hierarchyDescription->getName(), array_map(function (Node $childNode) {
return $this->buildAggregatorOfNodes($childNode);
}, $hierarchyDescription->getChildren()), $this->nodeAggregatorFactory->buildAggregatorFor($hierarchyDescription));
}