public WebClient webClient(Consumer<WebClientBuilder> webClientCustomizer) {
        requireNonNull(webClientCustomizer, "webClientCustomizer");
        return delegate.webClient(webClientCustomizer);
    }
Returns a newly created {@link WebClient} configured by {@link #configureWebClient(WebClientBuilder)}
and then the specified customizer.
junit5/src/main/java/com/linecorp/armeria/testing/junit5/server/ServerExtension.java