public void isNoneOf(
      @Nullable Object first, @Nullable Object second, @Nullable Object @Nullable ... rest) {
    isNotIn(accumulate(first, second, rest));
  }
@Test
  public void isNoneOfFailure() {
    expectFailure.whenTesting().that("b").isNoneOf("a", "b", "c");
    assertFailureKeys("expected not to be any of", "but was");
    assertFailureValue("expected not to be any of", "[a, b, c]");
  }