code: func CreateRiemannSink(uri *url.URL) (core.EventSink, error) {
  	var sink, err = riemannCommon.CreateRiemannSink(uri)
  	if err != nil {
  		glog.Warningf("Error creating the Riemann metrics sink: %v", err)
  		return nil, err
  	}
  	rs := &RiemannSink{
  		client: sink.Client,
  		config: sink.Config,
  	}
  	return rs, nil
  }
docs: // creates a Riemann sink. Returns a riemannSink