Hi Todd, sorry, a last question on this subject :-) : > Yep - just check (node instanceof List<?>).
suppose I'd have a big Tree, where data is loaded on-demand (the user clicks on a tree node). In this case, probably for any node of the current level i know the type (leaf or not), but without clicking it (or better, expanding it) forcing a data load, I'll have its children elements null. The suggested approach, could work also in this case ? Thanks, Sandro
