this fails in ActorDSLSpec; as `InboxActor` is a non-static inner class, it takes one more argument, where in this case the added twist is that the self-type trait Inbox is `ActorDSL.type`, meaning that the following is correct:

~~~ scala
val inboxProps = Props(classOf[InboxActor], ActorDSL, DSLInboxQueueSize)
~~~