import akka.testkit.JavaTestKit;
import akka.testkit.TestActorRef;
import com.google.common.base.Predicate;
-import com.google.common.base.Supplier;
import com.google.common.collect.ImmutableMap;
import com.google.common.util.concurrent.Uninterruptibles;
import java.util.ArrayList;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.TimeUnit;
+import java.util.function.Supplier;
import org.junit.After;
import org.opendaylight.controller.cluster.raft.MockRaftActorContext.MockPayload;
import org.opendaylight.controller.cluster.raft.base.messages.ApplyJournalEntries;