}

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

    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) {