It’s inside a script called GMLiveAPI, which is inside the extension folder in resource tree. Should GMS2 IDE have any issues, GMEdit works for Ctrl+T-ing to function declarations like that.
oh god, I'm such a klutz. I forgot that GMS2 (or at least my settings) doesn't automatically take you to a function if you're already inside of the script container that has it, even if it's 10,000 lines away -_- Thanks!
