System.out.println("Result is " + result);
Option<Integer> counterResult = calculator.incrementAndReturn();
System.out.println("Result is " + counterResult.get());
counterResult = calculator.incrementAndReturn();
System.out.println("Result is " + counterResult.get());
// Get access to the ActorRef
ActorRef calActor = TypedActor.get(_system).getActorRefFor(calculator);
// call actor with a message