output, stderr, fErr := istioCtl.Invoke(args)
	if fErr != nil {
		t.Logf("Unwanted exception for 'istioctl %s': %v. Stderr: %v", strings.Join(args, " "), fErr, stderr)
		return fErr
	}

	// output will be something like
	//      WORKLOAD    TOTAL RPS    ERROR RPS  P50 LATENCY  P90 LATENCY  P99 LATENCY
	//        server        0.182        0.000         40ms         74ms         97ms
	//
	lines := strings.Split(output, "\n")

...but continue reading below to see how to overcome that.

## Return Type and Data Filtering

Let's continue from the previous example. We wanted to **annotate the function with one type** but return something that includes **more data**.

We want FastAPI to keep **filtering** the data using the response model.

- plugin dependency metadata missing
- plugin dependency metadata retrieval problem
- plugin configuration problem
- plugin execution failure due to something that is know to possibly go wrong (like compilation failure)
- plugin execution error due to something that is not expected to go wrong (the compiler executable missing)
- asking to use a plugin for which you do not have a version defined - tools to easily select versions

			}
		}
	}
	close(c.syncedInitialSet)

	// start up your worker threads based on workers.  Some controllers have multiple kinds of workers
	for i := 0; i < workers; i++ {
		// runWorker will loop until "something bad" happens.  The .Until will then rekick the worker
		// after one second
		go wait.Until(c.runWorker, time.Second, stopCh)
	}

	// wait until we're told to stop
	<-stopCh
}

	if err == nil {
		syscall.Close(s)
		return true
	}
	if err != syscall.EPROTONOSUPPORT && err != syscall.EINVAL {
		// Something wrong with socket(), fall back to checking the kernel version.
		major, minor := KernelVersion()
		if runtime.GOOS == "illumos" {
			return major > 5 || (major == 5 && minor >= 11) // minimal requirement is SunOS 5.11
		}

	netutils "k8s.io/utils/net"
)

// LocalTrafficDetector generates iptables or nftables rules to detect traffic from local pods.
type LocalTrafficDetector interface {
	// IsImplemented returns true if the implementation does something, false
	// otherwise. You should not call the other methods if IsImplemented() returns
	// false.
	IsImplemented() bool

	// IfLocal returns iptables arguments that will match traffic from a local pod.

==============================================================================*/
// This file extends/implements core stream executor base classes in terms of
// the C API defined in stream_executor.h. A class "CSomething" represents a
// "Something" that can be manipulated via calls in the C interface and a C
// struct called "SP_Something".
//
// This file also contains stream_executor::Platform registration for pluggable
// device.

a few x/tools CLs deprecated and deleted the experimental golang.org/x/tools/cmd/getgo tool per accepted proposal https://go.dev/issue/60951; an unreleased change and not something that's in scope of Go 1.23 release notes
many x/vuln CLs to implement accepted proposal https://go.dev/issue/61347 ("x/vuln: convert govulncheck output to sarif format") in govulncheck

				t.Logf("Header: %+v for %q (type=%v, class=%v)", h,
					q.Name.String(), q.Type, q.Class)
			},
			// TODO: add test without HandleA* hooks specified at all, that Go
			// doesn't issue retries; map to something terminal.
			HandleA: func(w AWriter, name string) error {
				w.AddIP([4]byte{1, 2, 3, 4})
				w.AddIP([4]byte{5, 6, 7, 8})
				return nil
			},
			HandleAAAA: func(w AAAAWriter, name string) error {

`Optional[Something]` is actually a shortcut for `Union[Something, None]`, they are equivalent.

This also means that in Python 3.10, you can use `Something | None`:

=== "Python 3.10+"

    ```Python hl_lines="1"
    {!> ../../../docs_src/python_types/tutorial009_py310.py!}
    ```