@Keep
    public void twoArg(String s, Integer i) {
      checkNotNull(s);
      i.intValue();
    }

    @Keep
    public void twoMixedArgs(String s, @Nullable Integer i) {
      checkNotNull(s);
    }

    @Keep
    public void twoMixedArgs(@Nullable Integer i, String s) {
      checkNotNull(s);
    }

    @Keep
    public void twoMixedArgsThrows(String s, @Nullable Integer i) {