@Override
  public CompletableFuture<T> toCompletableFuture()
  {
    return _task.toCompletionStage().toCompletableFuture();
  }
@Test
  public void testToCompletableFuture_success() throws Exception
  {
    CompletionStage completableFuture = createTestStage(TESTVALUE1).toCompletableFuture();
    assertEquals(completableFuture.toCompletableFuture().get(), TESTVALUE1);
  }