According to the Akka docs, a
the default implementation of the dead letters service to which Akka routes all messages whose destinations are shut down or non-existent.
If I wanted to "tap into" dead letters sent after an actor is terminated, do I just somehow "hook" this
DeadLetterActorRef and get it to pass me everything it receives? Or do I subclass it? Or do I do something else entirely different? Either way, how?