https://github.com/zencart/zencart/issues/4939

I also did if (!defined

I have this mod working in production with ZC158, but since I have the UMM version, I can't make my changes public.
I invested a lot of time keeping this mod alive in the interim between Conors passing and CEON support being reactivated. I'm not doing that again.

CEON support needs to clarify the support plan for the free mod.