@Override protected URLConnection openConnection(URL url) {
        return open(url);
      }
Creates a URLStreamHandler as a {@link java.net.URL#setURLStreamHandlerFactory}.

<p>This code configures OkHttp to handle all HTTP and HTTPS connections
created with {@link java.net.URL#openConnection()}: <pre>   {@code

  OkHttpClient okHttpClient = new OkHttpClient();
  URL.setURLStreamHandlerFactory(new OkUrlFactory(okHttpClient));
}</pre>
gateway/platforms/servlet/src/main/java/io/apiman/gateway/platforms/servlet/connectors/ok/OkUrlFactory.java