You pointed me at the right thing and I am kinda brain dead today and was doing some stupid things.

The way I understand it, it tells you specifically when a module is added in each version, the first_release() tells you what version that module was added into core. As long as I get a number back from it, I know it is a part of Core.

That was huge help and I did not know about that module, so overall it has been a good day! :)