if err != nil {
		t.Fatalf("NewReader(testdata/issue6550.gz): %v", err)
	}
	defer gzip.Close()
	done := make(chan bool, 1)
	go func() {
		_, err := io.Copy(io.Discard, gzip)
		if err == nil {
			t.Errorf("Copy succeeded")
		} else {
			t.Logf("Copy failed (correctly): %v", err)
		}
		done <- true
	}()
	select {
	case <-time.After(1 * time.Second):

// phase is used for collapsing columns and should be unique across the table.
func (w *HTMLWriter) WritePhase(phase, title string) {
	if w == nil {
		return // avoid generating HTML just to discard it
	}
	hash := hashFunc(w.Func)
	w.pendingPhases = append(w.pendingPhases, phase)
	w.pendingTitles = append(w.pendingTitles, title)
	if !bytes.Equal(hash, w.prevHash) {
		w.flushPhases()
	}

		})
		if err != nil {
			t.Errorf("error on createHTTPStreams: %v", err)
			return
		}
		defer ctx.conn.Close()
		// Read/discard STDIN data before returning error on error stream.
		_, err = io.Copy(io.Discard, ctx.stdinStream)
		if err != nil {
			t.Fatalf("error copying STDIN to DISCARD: %v", err)
		}
		// Force an non-zero exit code error returned on the error stream.

	// TODO(bradfitz): also bound this copy in time. Or send
	// some sort of abort request to the host, so the host
	// can properly cut off the client sending all the data.
	// For now just bound it a little and
	io.CopyN(io.Discard, body, 100<<20)
	body.Close()

	if !req.keepConn {
		c.conn.Close()
	}
}

func (c *child) cleanUp() {
	for _, req := range c.requests {
		if req.pw != nil {

	}

	return out
}

// buildRedisFilter builds an outbound Envoy RedisProxy filter.
// Currently, if multiple clusters are defined, one of them will be picked for
// configuring the Redis proxy.
func buildRedisFilter(statPrefix, clusterName string) *listener.Filter {
	redisProxy := &redis.RedisProxy{

                        preserved.add(serviceRegistration);
                    }
                }).rethrow();
            } finally {
                // Replace the entire container, rather than clear it, to discard all the service instances and because it may contain configuration actions and
                // other state that can affect the service instances when they are registered again

						errOnce.Do(func() {
							retError = err.Error()
						})
					}
					downloadsCancel()
					return
				}
				fbr := firstByteRecorder{
					r: r,
				}
				n, err := xioutil.Copy(xioutil.Discard, &fbr)
				r.Close()
				if err == nil {
					response := time.Since(t)
					ttfb := time.Since(*fbr.t)
					// Only capture success criteria - do not
					// have to capture failed reads, truncated

func init() {
	metav1.AddToGroupVersion(scheme, metav1.SchemeGroupVersion)
	utilruntime.Must(example.AddToScheme(scheme))
	utilruntime.Must(examplev1.AddToScheme(scheme))

	grpclog.SetLoggerV2(grpclog.NewLoggerV2(ioutil.Discard, ioutil.Discard, os.Stderr))
}

func newPod() runtime.Object {
	return &example.Pod{}
}

func newPodList() runtime.Object {
	return &example.PodList{}
}

O benefício de lançar uma exceção em vez de retornar um valor ficará mais evidente na seção sobre Dependências e Segurança.

Neste exemplo, quando o cliente pede, na requisição, por um item cujo ID não existe, a exceção com o status code `404` é lançada:

```Python hl_lines="11"

		// We don't support (or want) to silently (re)deploy any binaries that were not in the initial "snapshot"
		// so we intentionally discard/do not update the list of installedBins on redeploys.
		if _, err := in.installAll(ctx); err != nil {
			return err
		}
		installLog.Info("Istio CNI configuration and binaries validated/reinstalled.")
	}
}