@Override
    public boolean setRawStatusCode(@Nullable Integer statusCode) {
        return setStatusCode(statusCode != null ? HttpStatusCode.valueOf(statusCode) : null);
    }
Set the HTTP status code of the response.
Note that this method is only valid for Spring 6. Spring 5 takes {@link HttpStatus} as the input type.
spring/boot3-webflux-autoconfigure/src/main/java/com/linecorp/armeria/spring/web/reactive/AbstractServerHttpResponseVersionSpecific.java