function RefsInEffects() {
  const ref = useRefHelper();
  const wrapped = useDeeperRefHelper();
  useEffect(() => {
    print(ref.current);
    print(wrapped.foo.current);
  });
}
We never include a .current access in a dep array because it may be a ref access.
This might over-capture objects that are not refs and happen to have fields named
current, but that should be a rare case and the result would still be correct
(assuming the effect is idempotent). In the worst case, you can always write a manual
dep array.