It's super useful. There's a way to reference a node that just places that node as a child, whole cloth, and another way that merges the node reference with th

It's super useful. There's a way to reference a node that just places that node as a child, whole cloth, and another way that merges the node reference with the local node. This is useful, say, if you're actually de/serializing objects and want to maintain actual references, or if you're just trying to share data between nodes.