Per `RSC15g`, introduced in https://github.com/ably/docs/pull/965. See https://github.com/ably/ably-js/pull/682 and https://github.com/ably/ably-ruby/pull/196 for reference implementations.
Per
RSC15g, introduced in ably/docs#965.See ably/ably-js#682 and ably/ably-ruby#196 for reference implementations.