protected DistributionSummary createSummary(Response response, Type type) {
    final Tag[] tags = extraTags(response, type, null);
    final RequestTemplate template = response.request().requestTemplate();
    final Tags allTags =
        metricTagResolver.tag(template.methodMetadata(), template.feignTarget(), tags);
    return meterRegistry.summary(metricName.name("response_size"), allTags);
  }
Wrap feign {@link Decoder} with metrics.
micrometer/src/main/java/feign/micrometer/MeteredDecoder.java