bpo-43453: Update and re-add example to typing runtime_checkable (GH-27013)


Co-authored-by: Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com>
(cherry picked from commit 17f94e28882e1e2b331ace93f42e8615383dee59)

Co-authored-by: andrei kulakov <andrei.avk@gmail.com>
1 file changed