import akka.actor.ActorRef;
import akka.dispatch.Dispatchers;
+import akka.protobuf.ByteString;
import akka.testkit.TestActorRef;
import akka.testkit.javadsl.TestKit;
import com.google.common.base.Optional;
import com.google.common.collect.ImmutableMap;
import com.google.common.io.ByteSource;
import com.google.common.util.concurrent.Uninterruptibles;
-import com.google.protobuf.ByteString;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Arrays;