I replied to the support ticket. For convenience I am pasting my reply below:
Should all leaf nodes be made anchors or just the last leaf node? It is not clear from the example. In the first case you can use the hasChildren field (and if needed the level method to determine) if the node is leaf. In case you need to make only the last leaf then you should also check the index of the item in the parent data. I created an example
that demonstrates both cases.
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