md := sha512.New()
	md.Write(priv.D.Bytes()) // the private key,
	md.Write(entropy)        // the entropy,
	md.Write(hash)           // and the input hash;
	key := md.Sum(nil)[:32]  // and compute ChopMD-256(SHA-512),
	// which is an indifferentiable MAC.

	// Create an AES-CTR instance to use as a CSPRNG.
	block, err := aes.NewCipher(key)
	if err != nil {
		return nil, err
	}

	// Find all keys we need to lookup
	keys := map[instancesKey]struct{}{}
	for _, i := range instances {
		keys[makeInstanceKey(i)] = struct{}{}
	}
	s.queueEdsEvent(keys, s.doEdsCacheUpdate)
}

// queueEdsEvent processes eds events sequentially for the passed keys and invokes the passed function.

)

func init() {
	utilfeature.DefaultMutableFeatureGate.Add(defaultKubernetesFeatureGates)
}

// defaultKubernetesFeatureGates consists of all known Kubernetes-specific feature keys.
// To add a new feature, define a key for it above and add it here. The features will be
// available throughout Kubernetes binaries.
var defaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureSpec{

	if w.lastpart != nil {
		fmt.Fprintf(&b, "\r\n--%s\r\n", w.boundary)
	} else {
		fmt.Fprintf(&b, "--%s\r\n", w.boundary)
	}

	keys := make([]string, 0, len(header))
	for k := range header {
		keys = append(keys, k)
	}
	slices.Sort(keys)
	for _, k := range keys {
		for _, v := range header[k] {
			fmt.Fprintf(&b, "%s: %s\r\n", k, v)
		}
	}
	fmt.Fprintf(&b, "\r\n")
	_, err := io.Copy(w.w, &b)

	return nil
}

func (s *store) prepareKey(key string) (string, error) {
	if key == ".." ||
		strings.HasPrefix(key, "../") ||
		strings.HasSuffix(key, "/..") ||
		strings.Contains(key, "/../") {
		return "", fmt.Errorf("invalid key: %q", key)
	}
	if key == "." ||
		strings.HasPrefix(key, "./") ||
		strings.HasSuffix(key, "/.") ||
		strings.Contains(key, "/./") {

	classGold := "gold"
	validClaim := testVolumeClaim("foo", "ns", core.PersistentVolumeClaimSpec{
		Selector: &metav1.LabelSelector{
			MatchExpressions: []metav1.LabelSelectorRequirement{
				{
					Key:      "key2",
					Operator: "Exists",
				},
			},
		},
		AccessModes: []core.PersistentVolumeAccessMode{
			core.ReadWriteOnce,
			core.ReadOnlyMany,
		},
		Resources: core.VolumeResourceRequirements{

   * Returns the value associated with {@code key}, or zero if there is no value associated with
   * {@code key}.
   */
  public long get(K key) {
    return map.getOrDefault(key, 0L);
  }

  /**
   * Increments by one the value currently associated with {@code key}, and returns the new value.
   */
  @CanIgnoreReturnValue
  public long incrementAndGet(K key) {
    return addAndGet(key, 1);
  }

  /**

}

// lookupLabelValue returns the value of the first label in the supplied map that matches
// one of the supplied keys.
func lookupLabelValue(labels map[string]string, keys ...string) (string, bool) {
	for _, key := range keys {
		if value, ok := labels[key]; ok {
			return value, true
		}
	}
	return "", false
}

func HasCanonicalServiceName(labels map[string]string) bool {

You can also declare a body as a `dict` with keys of some type and values of some other type.

This way, you don't have to know beforehand what the valid field/attribute names are (as would be the case with Pydantic models).

This would be useful if you want to receive keys that you don't already know.

---

Another useful case is when you want to have keys of another type (e.g., `int`).

        return self.module(group, name, version);
    }

    @Nullable
    private static String extract(Map<String, CharSequence> map, String key) {
        return map.containsKey(key) ? map.get(key).toString() : null;
    }

    /**
     * Modifies a dependency.
     *
     * @param dependencyNotation dependency to modify
     * @return the modified dependency