You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: opencensus.go
    path of file: ./repos/go-elasticsearch/_examples/instrumentation
    
    the code of the file until where you have to start completion: // Licensed to Elasticsearch B.V. under one or more c
    
func main() {
	log.SetFlags(0)
	start := time.Now()

	// Create new elasticsearch client ...
	//
	es, err := elasticsearch.NewClient(
		elasticsearch.Config{
			// >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
			// ... using the "ochttp" wrapper for instrumentation
			Transport: &ochttp.Transport{},
			// <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
		})
	if err != nil {
		log.Fatalf("ERROR: %s", err)
	}

	// Set up the "done" channel
	//
	done := make(chan os.Signal)
	signal.Notify(done, os.Interrupt)

	// Set up tickers
	//
	tickers := struct {
		Info   *time.Ticker
		Index  *time.Ticker
		Health *time.Ticker
		Search *time.Ticker
	}{
		Info:   time.NewTicker(time.Second),
		Index:  time.NewTicker(500 * time.Millisecond),
		Health: time.NewTicker(5 * time.Second),
		Search: time.NewTicker(10 * time.Second),
	}
	defer tickers.Info.Stop()
	defer tickers.Index.Stop()
	defer tickers.Health.Stop()
	defer tickers.Search.Stop()

	// Register views bundled with the "ochttp" plugin
	//
	if err := view.Register(
		ochttp.ClientRoundtripLatencyDistribution,
		ochttp.ClientCompletedCount,
	); err != nil {
		log.Fatalf("ERROR: %s", err)
	}

	// Report views to STDOUT once in a while
	//
	view.SetReportingPeriod(5 * time.Second)
	view.RegisterExporter(&ConsoleExporter{})

	// Report a portion of traces to STDOUT
	//
	trace.ApplyConfig(trace.Config{DefaultSampler: trace.ProbabilitySampler(0.5)})
	trace.RegisterExporter(&ConsoleExporter{})

	// Initialize the context
	//
	ctx, _ := tag.New(context.Background(), tag.Upsert(tagMethod, "main"))

	// Perform API calls
	//
	for {
		select {
		case <-done:
			fmt.Print("\n")
			fmt.Println(strings.Repeat("━", tWidth))
			faint.Printf("Finished in %s\n\n", time.Now().Sub(start).Truncate(time.Second))
			return

		// -> Info
		//
		case <-tickers.Info.C:
			res, err := es.Info(es.Info.WithContext(ctx))
			if err != nil {
				boldRed.Printf("Error getting response: %s\n", err)
			} else {
				res.Body.Close()
			}

		// -> Index
		//
		case t := <-tickers.Index.C:
			// Artificially fail some requests...
			var body io.Reader
			if t.Second()%4 == 0 {
				body = strings.NewReader(``)
			} else {
				body = strings.NewReader(`{"timestamp":"` + t.Format(time.RFC3339) + `"}`)
			}

			res, err := es.Index("test", body, es.Index.WithContext(ctx))
			if err != nil {
				boldRed.Printf("Error getting response: %s\n", err)
			} else {
				res.Body.Close()
			}

		// -> Health
		//
		case <-tickers.Health.C:
			res, err := es.Cluster.Health(
				es.Cluster.Health.WithLevel("indices"),
				es.Cluster.Health.WithContext(ctx),
			)
			if err != nil {
				boldRed.Printf("Error getting response: %s\n", err)
			} else {
				res.Body.Close()
			}

		// -> Search
		//
		case <-tickers.Search.C:
			res, err := es.Search(
				es.Search.WithIndex("test"),
				es.Search.WithSort("timestamp:desc"),
				es.Search.WithSize(1),
				es.Search.WithContext(ctx),
			)
			if err != nil {
				boldRed.Printf("Error getting response: %s\n", err)
			} else {
				res.Body.Close()
			}
		}
	}
}