void doSubmit(final Runnable action) {
    CONTINUATION.get().submit(action);
  }
@Test
  public void testDeepRecursion() {
    final Continuations CONT = new Continuations();
    final AtomicInteger result = new AtomicInteger();
    CONT.doSubmit(() -> {
      deepRecursion(CONT, result, 0);
    });
    assertEquals(result.get(), 1000001);
  }