PS as a very short term fix, for anyone holding on the Sneaky Peek builds, it turns out that non-leaf nodes were findable in a marginally less clumsy fashion than I had previously stumbled on with:
Code:
tasks where (tasks of tasks) is not tasks
and terminal leaves were harvestable with:
Code:
tasks where (tasks of tasks) is tasks
Happily, due to the excellent work which Tim has modestly announced, these slightly baroque formulations are now, at best, of rather obscure antiquarian interest :-)