akka.net is there a a way to get or create actor
<p>For my actor hierarchy, I do not know all the actors I need until I process the data through a few actors, so I'm looking for a way to either return an existing ActorRef or create a new action.  This is what I would like the code below to either create an actor if one does not exist at "my-id-1" or return the one that already exists.</p>

<pre><code>Context.ActorOf(MyActor.Props(message), "my-id-1");
</code></pre>

<p>The above code will (as documented) throw a <code>InvalidActorNameException</code> if the actor already exists.  How can I accomplish this in Akka.net?</p>