Comment 4 for bug 529256

in pseudo-code, what I think you need is the following :

1) ft = req.get_new_filtered_tree()
2) ft.apply_filter("notag_tasks")
3) ft.get_node_nbrs()

(that's the spirit)

Once it's working, we could optimize by caching the number and not parsing the whole ft every time but, before optimisation, we should have it work.