Question about SimFx sky Scattering example!

Hello everyone.

Been running through sources and found this cool SimFx sky scattering example. I have only but one question related to the code. What is VersionedReference used for? And is there a substitute class for it?

It’s used for easily detecting the changes in some object/reference.

Why would you want a replacement for it?

Edit: note you can find (a little) more information here:
And here:

The second link having more information than the first.

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Oh I was just wondering if you had reupped the version you have based off something that nifty would have in its package. Just a simple question. I’ve got the lemur package and didn’t even know I had it on my computer! thanks pspeed!