* @return the implied set of features
   */
  public static Set<Feature<?>> impliedFeatures(Set<Feature<?>> features) {
    Set<Feature<?>> impliedSet = new LinkedHashSet<>();
    Queue<Feature<?>> queue = new ArrayDeque<>(features);
    while (!queue.isEmpty()) {
      Feature<?> feature = queue.remove();
      for (Feature<?> implied : feature.getImpliedFeatures()) {
        if (!features.contains(implied) && impliedSet.add(implied)) {

	// initialzation, it can flip the support at runtime.
	Supports(feature storage.Feature) bool
	// CheckClient works with etcd client to recalcualte feature support and cache it internally.
	// All etcd clients should support feature to cause `Supports` return true.
	// If client A supports and client B doesn't support the feature, the `Supports` will
	// first return true at client A initializtion and then return false on client B

# Feature Coverage Reporting

## Overview

The features package defines values that are used to track feature coverage at eng.istio.io

## Labeling a Test

    Set<Feature<?>> features = Sets.<Feature<?>>newHashSet(ExampleBaseFeature.BASE_FEATURE_1);
    assertSame(features, FeatureUtil.addImpliedFeatures(features));
  }

  public void testAddImpliedFeatures_addsImpliedFeatures() throws Exception {
    Set<Feature<?>> features;

    features = Sets.<Feature<?>>newHashSet(ExampleDerivedFeature.DERIVED_FEATURE_1);

         */
        private static EnumSet<Feature> activeFeatures() {
            EnumSet<Feature> activeFeatures = EnumSet.noneOf(Feature.class);
            for (Feature feature : Feature.values()) {
                if (feature.isActive()) {
                    activeFeatures.add(feature);
                }
            }
            return activeFeatures;
        }

)

var maxExtendedFunctionInformation uint32

func doinit() {
	options = []option{
		{Name: "adx", Feature: &X86.HasADX},
		{Name: "aes", Feature: &X86.HasAES},
		{Name: "erms", Feature: &X86.HasERMS},
		{Name: "pclmulqdq", Feature: &X86.HasPCLMULQDQ},
		{Name: "rdtscp", Feature: &X86.HasRDTSCP},
		{Name: "sha", Feature: &X86.HasSHA},
	}
	level := getGOAMD64level()
	if level < 2 {

func doinit() {
	options = []option{
		{Name: "aes", Feature: &ARM64.HasAES},
		{Name: "pmull", Feature: &ARM64.HasPMULL},
		{Name: "sha1", Feature: &ARM64.HasSHA1},
		{Name: "sha2", Feature: &ARM64.HasSHA2},
		{Name: "sha512", Feature: &ARM64.HasSHA512},
		{Name: "crc32", Feature: &ARM64.HasCRC32},
		{Name: "atomics", Feature: &ARM64.HasATOMICS},
		{Name: "cpuid", Feature: &ARM64.HasCPUID},

   * @return the implied set of features
   */
  public static Set<Feature<?>> impliedFeatures(Set<Feature<?>> features) {
    Set<Feature<?>> impliedSet = new LinkedHashSet<>();
    Queue<Feature<?>> queue = new ArrayDeque<>(features);
    while (!queue.isEmpty()) {
      Feature<?> feature = queue.remove();
      for (Feature<?> implied : feature.getImpliedFeatures()) {
        if (!features.contains(implied) && impliedSet.add(implied)) {

}

// Feature represents a feature being gated
type Feature struct {
	featuregate.FeatureSpec
	MinimumVersion     *version.Version
	HiddenInHelpText   bool
	DeprecationMessage string
}

// FeatureList represents a list of feature gates
type FeatureList map[string]Feature

// ValidateVersion ensures that a feature gate list is compatible with the chosen Kubernetes version

  }

  private static Set<Feature<?>> computeReserializedMapFeatures(Set<Feature<?>> mapFeatures) {
    Set<Feature<?>> derivedFeatures = Helpers.copyToSet(mapFeatures);
    derivedFeatures.remove(CollectionFeature.SERIALIZABLE);
    derivedFeatures.remove(CollectionFeature.SERIALIZABLE_INCLUDING_VIEWS);
    return derivedFeatures;
  }

  private static Set<Feature<?>> computeEntrySetFeatures(Set<Feature<?>> mapFeatures) {