private static feign.Response toFeignResponse(Response response, feign.Request request)
      throws IOException {
    return feign.Response.builder()
        .protocolVersion(enumForName(ProtocolVersion.class, response.protocol().name()))
        .status(response.code())
        .reason(response.message())
        .request(request)
        .headers(toMap(response.headers()))
        .body(toBody(response.body()))
        .build();
  }
This module directs Feign's http requests to
<a href="http://square.github.io/okhttp/">OkHttp</a>, which enables SPDY and better network
control. Ex.

<pre>
GitHub github = Feign.builder().client(new OkHttpClient()).target(GitHub.class,
"https://api.github.com");
okhttp/src/main/java/feign/okhttp/OkHttpClient.java