-scala: akka: PF.empty test

E.scala

import akka.actor.{Actor, ActorSystem, Props}
import akka.util.Timeout
import akka.pattern.ask
import scala.concurrent.duration._

implicit val timeout = Timeout(2.seconds)

class Loafer extends Actor {
  // def receive = PartialFunction.empty
  def receive = {
    case _ => sender ! "oh, I have a story!"
  }
}

val slackie = ActorSystem("Slackie")

val lf = slackie.actorOf(Props[Loafer], "loafer")
  
val answer = Await.result(
  lf ? "What's up, loafer?", 2.seconds
).asInstanceOf[String]

println(answer)

slackie shutdown()