public ContentPreviewingService build(HttpService delegate) {
        return new ContentPreviewingService(delegate, contentPreviewerFactory,
                                            requestPreviewSanitizer, responsePreviewSanitizer);
    }
Returns a newly-created {@link ContentPreviewingService} decorating {@code delegate} based on the
properties of this builder.
core/src/main/java/com/linecorp/armeria/server/logging/ContentPreviewingServiceBuilder.java