Akka Typed 2.6.x noSender limits for optional replies
Fire-and-forget message design in Akka Typed Goal is to define a message protocol in Akka Typed 2.6.x where some messages are fire-and-forget and others carry an explicit reply channel, without requiring a replyTo field on every message type. The typed API does not expose a noSender reference. Classic ActorRef.noSender() is not available in the typed API, an
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