I have an extension that contributes some trees in the explorer, some of which are much more important than others. I can't find a way to force the ordering of these - the "important" one always seems to come last.

I tried registering them in a different order but it didn't help. I tried hiding/showing one (using contexts) to see if that would force it to the bottom, but it didn't.

In my case, the "important" tree that I want above the others is hidden/shown based on some criteria, so I need to be able to hide it and then show it later without it having to be last.