The open source roku_builder @ https://github.com/ViacomInc/roku_builder recently added a "roku --profile stats" command that shows you a count of all nodes currently in the UI thread, and a break down of what they are.
That's just a <something>-coated sgnodes, it seems.
It tries hard to be a swiss-army knife. Like i look at each command and it is a one-step "oh, it does this", "it does that" already-easy feature. I don't know what that <something>-coat is - i had a glance and the operations it provides never needed to be sugar-coated, IMO. But YMMV.