+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+import static org.opendaylight.yangtools.util.concurrent.AsyncNotifyingListeningExecutorServiceTest.testListenerCallback;
+import static org.opendaylight.yangtools.util.concurrent.CommonTestUtils.SUBMIT_CALLABLE;
+import static org.opendaylight.yangtools.util.concurrent.CommonTestUtils.SUBMIT_RUNNABLE;
+import static org.opendaylight.yangtools.util.concurrent.CommonTestUtils.SUBMIT_RUNNABLE_WITH_RESULT;
+import com.google.common.base.Supplier;
+import com.google.common.util.concurrent.FutureCallback;
+import com.google.common.util.concurrent.Futures;
+import com.google.common.util.concurrent.ListenableFuture;
+import com.google.common.util.concurrent.ListeningExecutorService;
+import com.google.common.util.concurrent.ThreadFactoryBuilder;