what's the meaning of XGE?

Unreal Engine Programming & Scripting C++
#1

Packaging (Windows (32-bit)): UE4Build.Build: XGE was requested, but is unavailable, so we won’t use it.
what’s the meaning of XGE?

#2

Apparently it’s incredibuild.

I was just readingthis thread and it showed up

#3

That’s far from apparent.