protected HttpResponse echo(AggregatedHttpRequest aReq) {
            final HttpStatus httpStatus = HttpStatus.valueOf(aReq.contentUtf8());
            if (httpStatus != HttpStatus.UNKNOWN) {
                responseStatus = httpStatus;
            }
            return HttpResponse.of(ResponseHeaders.of(responseStatus), aReq.content());
        }
A helper class for testing with Nacos.
nacos/src/test/java/com/linecorp/armeria/internal/nacos/NacosTestBase.java