import akka.pattern.Patterns;
import akka.testkit.TestActorRef;
import akka.util.Timeout;
-import com.google.common.base.Function;
import com.google.common.base.Stopwatch;
import com.google.common.util.concurrent.Uninterruptibles;
import java.util.Optional;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.function.Consumer;
+import java.util.function.Function;
import org.junit.Assert;
import org.opendaylight.controller.cluster.access.concepts.MemberName;
import org.opendaylight.controller.cluster.datastore.AbstractActorTest;