// remounted to reflect changes in the referencing pod. Atomically updating
	// volumes, depend on this to update the contents of the volume.
	// All volume mounting calls should be idempotent so a second mount call for
	// volumes that do not need to update contents should not fail.

		key := r.newKey()

		oldSha, found := s.shas[key]
		if !found || oldSha != r.sha {
			scope.Debugf("KubeSource.ApplyContent: Set: %v/%v", r.schema.GroupVersionKind(), r.fullName())
			// apply is idempotent, but configstore is not, thus the odd logic here
			_, err := s.inner.Update(*r.config)
			if err != nil {
				_, err = s.inner.Create(*r.config)
				if err != nil {

func IstioUserAgent() string {
	return adjustCommand(os.Args[0]) + "/" + istioversion.Info.Version
}

// SetRestDefaults is a helper function that sets default values for the given rest.Config.
// This function is idempotent.
func SetRestDefaults(config *rest.Config) *rest.Config {
	if config.GroupVersion == nil || config.GroupVersion.Empty() {
		config.GroupVersion = &corev1.SchemeGroupVersion
	}
	if len(config.APIPath) == 0 {

      int value = random.nextInt();
      HashCode hashcode1 = hashFunction.hashInt(value);
      HashCode hashcode2 = hashFunction.hashInt(value);
      Assert.assertEquals(hashcode1, hashcode2); // idempotent
      Assert.assertEquals(hashFunction.bits(), hashcode1.bits());
      Assert.assertEquals(hashFunction.bits(), hashcode1.asBytes().length * 8);
      hashcodes.add(hashcode1);
    }

  // if the object being admitted is modified by other admission plugins after the initial webhook call.
  // Webhooks that specify this option *must* be idempotent, able to process objects they previously admitted.
  // Note:
  // * the number of additional invocations is not guaranteed to be exactly one.

type ServerCodec interface {
	ReadRequestHeader(*Request) error
	ReadRequestBody(any) error
	WriteResponse(*Response, any) error

	// Close can be called multiple times and must be idempotent.
	Close() error
}

// ServeConn runs the [DefaultServer] on a single connection.
// ServeConn blocks, serving the connection until the client hangs up.
// The caller typically invokes ServeConn in a go statement.

# Hash argument with an optional Algorithm, in which case it will attempt to
# validate the downloaded file against the hash. SHA512 will be used if
# -Algorithm is not provided.
# This function is idempotent, if OutFile already exists and has the correct Hash
# then the download will be skipped. If the Hash is incorrect, the file will be
# overwritten.
function MustDownload-File {
  param (

		//
		// This differs from os.WriteFile, which truncates to 0 *before* writing
		// via os.O_TRUNC. Truncating only after writing ensures that a second write
		// of the same content to the same file is idempotent, and does not — even
		// temporarily! — undo the effect of the first write.
		err = f.Truncate(int64(len(entry)))
	}
	if closeErr := f.Close(); err == nil {
		err = closeErr
	}
	if err != nil {

  // if the object being admitted is modified by other admission plugins after the initial webhook call.
  // Webhooks that specify this option *must* be idempotent, able to process objects they previously admitted.
  // Note:
  // * the number of additional invocations is not guaranteed to be exactly one.

			if actual != tc.want {
				t.Fatalf("Unexpected result.\nExpected:\n%v\nActual:\n%v", tc.want, actual)
			}
			t.Run("idempotency", func(t *testing.T) {
				actual := appendMultusNetwork(actual, "istio-cni")
				if actual != tc.want {
					t.Fatalf("Function is not idempotent.\nExpected:\n%v\nActual:\n%v", tc.want, actual)
				}
			})
		})
	}
}

func Test_updateClusterEnvs(t *testing.T) {