@Override
    @Nullable
    public Integer getRawStatusCode() {
        final HttpStatus statusCode = getStatusCode();
        return statusCode != null ? statusCode.value() : null;
    }
Set the HTTP status code of the response.
Note that this method is only valid for Spring 5. {@code HttpStatusCode} is used as the input type in
Spring 6.
spring/boot2-webflux-autoconfigure/src/main/java/com/linecorp/armeria/spring/web/reactive/AbstractServerHttpResponseVersionSpecific.java