function isFastRefreshEnabled(): boolean {
  // @fb-only: const {isAcceptingUpdate} = require('__debug');
  // @fb-only: return typeof isAcceptingUpdate === 'function' && isAcceptingUpdate();
  return false; // @oss-only
}
mode: The React API and approach to use for syncing state with React
early: Re-renders from Recoil updates occur:
   1) earlier
   2) in sync with React updates in the same batch
   3) before transaction observers instead of after.
concurrent: Is the current mode compatible with Concurrent Mode and useTransition()