Hello,
Indeed, the InternalVar has been removed as I thought it not being used and got some feedback about it being confusing, but maybe I am wrong. I can certainly bring it back. If you want to get it back now, you can please open up InternalVar.cs file and remove the [System.Obsolete] attribute that is found right above the class name in the file.
I often use this type of variable. I will be glad if you return them. thanks !!!
it may be possible to make a different color for these variables, in general so that they are visually different from other blocks,
there will be less confusion.