@DALII
Not really sure what you mean, are you asking if you can import result of the boole or generators? If that is the case, then no, you can import only raw geometry. You can reference a classic object, but then it is not living in the graph, it is a reference to object sitting in object manager. If you are asking how to stop something in the graph as equivalent to stopping a generator in hierarchy with stop tag, that just requires mindset change. You simply don't apply it at first place - nodes give you multidimensional possibilities which exceed object manager. One other aspect that you will discover later which is very handy is that you can save your assets and utilize the versioning system which is builtin 🙂
As far as questions are concerned, no worries, fire away!