Any chance of giving a static function to return an invalid value tree? Right now, if I wish to return one from my functions, I have to get an actual ValueTree, and purposely ask for an out of range child.
I added one of those a few weeks ago, didn’t I?
ah, okay 
it’s so hard to know when such things get added - the online docs are well out of date, and i don’t update juce ‘on the offchance’ because GIT is a huge pain in the arse.