(saneRejectedExecutionHandler: StringAdd).self
(saneRejectedExecutionHandler: StringFormat).self
(saneRejectedExecutionHandler: ArrowAssoc[SaneRejectedExecutionHandler]).x
(Since version 2.10.0) Use leftOfArrow instead
(saneRejectedExecutionHandler: Ensuring[SaneRejectedExecutionHandler]).x
(Since version 2.10.0) Use resultOfEnsuring instead
The RejectedExecutionHandler used by Akka, it improves on CallerRunsPolicy by throwing a RejectedExecutionException if the executor isShutdown. (CallerRunsPolicy silently discards the runnable in this case, which is arguably broken)