title: Using NSURLConnecion delegates with NSURLConnection +sendAsynchronousRequest
body: <p>How does one use NSURLConnection delegate callbacks when using the </p>
  
  <pre><code>+ (void)sendAsynchronousRequest:(NSURLRequest *)request
                        queue:(NSOperationQueue*) queue
            completionHandler:(void (^)(NSURLResponse*, NSData*, NSError*))
  </code></pre>
  
  <p>method?</p>
  
  <p>I would like to be able to access the caching delegate callback on the queue handling the completion block.</p>