Thanks! I guess my actual question is -- what are the hook(s) Expo expects from a React Native package? I'm used to using Webpack or Gulp or Grunt to transpile

Thanks! I guess my actual question is -- what are the hook(s) Expo expects from a React Native package? I'm used to using Webpack or Gulp or Grunt to transpile source code into something deployable on the web. The React Native / Expo packaging process feels opaque to me though. It's not clear to me, for instance, whether Expo uses https://github.com/facebook/react-native/tree/master/packager https://github.com/facebook/react-native/tree/master/package... or whether it has some kind of different packaging process. Likewise, a newly created project with the XDE builds automatically using Babel. But it's not clear from the project itself how XDE knows to use Babel. Is Babel hard-coded in the XDE? Can I turn it off? Expo apps also all seem to have a `registerRootComponent` function, but there isn't any documentation on what this function actually does.