Nativization and macro question

According to the documentation, it says that blueprint macros don’t get nativized. Do they mean blueprint macro libraries or actual macros within a blueprint?

Never mind, I figured it out. In the BP macro library, if you go to the class settings and look for the nativize button, it will be grayed and if you highlight it, it will say this:

Thanks, came here wondering the same thing.

Though I thought macros were essentially unpacked/expanded into the node network under the hood anyway… Without knowing for sure exactly how it’s handled, I might end up just expanding macros near the end of the project and just using collapsed nodes instead, for nativization candidates like the PlayerController & Pawn BPs.