try {
      new NullPointerTester().testMethod(bar, method);
    } catch (AssertionFailedError incorrectError) {
      String errorMessage =
          rootLocaleFormat("Should not have flagged method %s for %s", method.getName(), bar);
      assertNull(errorMessage, incorrectError);
    }
  }

  public void verifyBarFail(Method method, TwoArg bar) {
    try {

      final AtomicReference<String> errorMessage = Atomics.newReference();
      executor.execute(
          new Runnable() {
            @Override
            public void run() {
              future.set("success");
              if (!future.isDone()) {
                errorMessage.set("Set call exited before future was complete.");
              }
            }

      final AtomicReference<String> errorMessage = Atomics.newReference();
      executor.execute(
          new Runnable() {
            @Override
            public void run() {
              future.set("success");
              if (!future.isDone()) {
                errorMessage.set("Set call exited before future was complete.");
              }
            }