releaseResources(OUTPUT_FUTURE_DONE); // nulls out `futures`

    if (isCancelled() & localFutures != null) {
      boolean wasInterrupted = wasInterrupted();
      for (Future<?> future : localFutures) {
        future.cancel(wasInterrupted);
      }
    }
    /*
     * We don't call clearSeenExceptions() until processCompleted(). Prior to that, it may be needed

    InterruptibleFuture future = new InterruptibleFuture();
    assertTrue(future.cancel(false));
    assertTrue(future.isCancelled());
    assertTrue(future.isDone());
    assertFalse(future.wasInterrupted());
    assertFalse(future.interruptTaskWasCalled);
    CancellationException e = assertThrows(CancellationException.class, () -> future.get());
    assertThat(e).hasCauseThat().isNull();
  }

    InterruptibleFuture future = new InterruptibleFuture();
    assertTrue(future.cancel(false));
    assertTrue(future.isCancelled());
    assertTrue(future.isDone());
    assertFalse(future.wasInterrupted());
    assertFalse(future.interruptTaskWasCalled);
    CancellationException e = assertThrows(CancellationException.class, () -> future.get());
    assertThat(e).hasCauseThat().isNull();
  }

      throws InterruptedException, TimeoutException, ExecutionException {
    assertDone(future);
    assertThat(future.isCancelled()).isTrue();
    assertThat(future.wasInterrupted()).isEqualTo(expectWasInterrupted);

    try {
      getDone(future);
      fail();
    } catch (CancellationException expected) {
    }

    try {
      getDoneFromTimeoutOverload(future);