docs: Optional<Span> configuredSpan(HttpRequest<?> request, HttpResponse<?> response) {
          Optional<Object> routeTemplate = request.getAttribute(HttpAttributes.URI_TEMPLATE);
          routeTemplate.ifPresent(o -> response.setAttribute(HttpAttributes.URI_TEMPLATE, o));
          response.setAttribute(HttpAttributes.METHOD_NAME, request.getMethod().name());
          return request.getAttribute(TraceRequestAttributes.CURRENT_SPAN, Span.class);
      }