-import com.google.common.base.Optional;
-import com.google.common.util.concurrent.CheckedFuture;
-import com.google.common.util.concurrent.Futures;
-import org.junit.Assert;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.Mockito.doReturn;
+import static org.opendaylight.yangtools.util.concurrent.FluentFutures.immediateFluentFuture;
+import static org.opendaylight.yangtools.util.concurrent.FluentFutures.immediateTrueFluentFuture;
+
+import com.google.common.util.concurrent.FluentFuture;
+import java.util.Optional;