What is the best way to change external variable with Optional?

[aquariusmaster]

I need to change some external variable in case of optional is present. What is the best way to do that with Optional.
Code example:

private void checkCORS(HttpRequest request, HttpResponse response) {
        Optional.ofNullable(request.getHeaders().get("Origin"))
                .map(list -> list.get(0))
                .filter(HealthHttp::isWhitelisted)
                .ifPresent(origin -> {
                  response.appendHeader("Access-Control-Allow-Origin", origin);
                  response.appendHeader("Access-Control-Allow-Headers", "Content-Type, Access-Control-Allow-Headers, Authorization, X-Requested-With");
                });

    }

As far as I know it is not recommended to change external variable inside lambda. In my case the external variable is HttpResponse response.
Please advice should I change the above code to:

private void checkCORS(HttpRequest request, HttpResponse response) {
        Optional<String> originValueOptional = Optional.ofNullable(request.getHeaders().get("Origin"))
                .map(list -> list.get(0))
                .filter(HealthHttp::isWhitelisted);
        if (originValueOptional.isPresent()) {
            response.appendHeader("Access-Control-Allow-Origin", originValueOptional.get());
            response.appendHeader("Access-Control-Allow-Headers", "Content-Type, Access-Control-Allow-Headers, Authorization, X-Requested-With");
        }
    }

[tboychuk]

@aquariusmaster the first option is fine.