Twitch Streaming & Source Code Policy

I just saw in today’s Thursday Twitch stream a demo of the Twitch integration directly in the editor. That’s pretty slick. I was wondering, though, what are the rules around streaming and showing source code? I’d imagine that showing my own source code is fine, of course. Showing Epic header files might be okay, but showing Epic .cpp files is a no-no?

There is a limit to the amount of line of codes you can show. Search AnswerHub if you like, this was answered before by Epic.