akka.http.model.headers.CacheDirectives
(max-stale: StringAdd).self
(max-stale: StringFormat).self
(max-stale: ArrowAssoc[max-stale]).x
(Since version 2.10.0) Use leftOfArrow
instead
(max-stale: Ensuring[max-stale]).x
(Since version 2.10.0) Use resultOfEnsuring
instead