}

    public static void staticOneArgNullableThrowsNpe(@Nullable String s) {
      checkNotNull(s); // doesn't check if you said you'd accept null, but you don't
    }

    public void oneArgCorrectlyThrowsNpe(String s) {
      checkNotNull(s); // expect NPE here on null
    }

    public void oneArgThrowsOtherThanNpe(String s) {
      throw new FooException(); // should catch as failure
    }