import akka.actor.ActorSystem;
import akka.actor.DeadLetter;
import akka.actor.Props;
-import akka.actor.UntypedActor;
+import akka.actor.UntypedAbstractActor;
import akka.testkit.TestKit;
import com.typesafe.config.ConfigFactory;
import java.util.concurrent.TimeUnit;
/**
* For testing.
*/
- public static class PingPongActor extends UntypedActor {
+ public static class PingPongActor extends UntypedAbstractActor {
ReentrantLock lock;