Creating a flow from actor in Akka Streams
<p>It's possible to create sources and sinks from actors using <code>Source.actorPublisher()</code> and <code>Sink.actorSubscriber()</code> methods respectively. But is it possible to create a <code>Flow</code> from actor?</p>

<p>Conceptually there doesn't seem to be a good reason not to, given that it implements both <code>ActorPublisher</code> and <code>ActorSubscriber</code> traits, but unfortunately, the <code>Flow</code> object doesn't have any method for doing this. In <a href="http://bryangilbert.com/blog/2015/02/04/akka-reactive-streams/">this</a> excellent blog post it's done in an earlier version of Akka Streams, so the question is if it's possible also in the latest (2.4.9) version.</p>