and DoesNotExist.
                            type: string
                          values:
                            description: values is an array of string values. If the
                              operator is In or NotIn, the values array must be non-empty.
                              If the operator is Exists or DoesNotExist, the values

// relates the key and values.
message LabelSelectorRequirement {
  // key is the label key that the selector applies to.
  // +patchMergeKey=key
  // +patchStrategy=merge
  optional string key = 1;

  // operator represents a key's relationship to a set of values.
  // Valid operators are In, NotIn, Exists and DoesNotExist.
  optional string operator = 2;

		Code:           "LexerInvalidLiteral",
		Description:    "The SQL expression contains an invalid operator.",
		HTTPStatusCode: http.StatusBadRequest,
	},
	ErrLexerInvalidIONLiteral: {
		Code:           "LexerInvalidIONLiteral",
		Description:    "The SQL expression contains an invalid operator.",
		HTTPStatusCode: http.StatusBadRequest,
	},
	ErrParseExpectedDatePart: {

    }

    @Override
    public boolean isEmpty() {
      synchronized (mutex) {
        return delegate().isEmpty();
      }
    }

    @Override
    public Iterator<E> iterator() {
      return delegate().iterator(); // manually synchronized
    }

    @Override
    public Spliterator<E> spliterator() {
      synchronized (mutex) {
        return delegate().spliterator();
      }
    }

		}
		// Ref: https://istio.io/latest/docs/ops/deployment/requirements/#pod-requirements
		if container.Name != "istio-proxy" && container.Name != "istio-operator" {
			if container.SecurityContext != nil && container.SecurityContext.RunAsUser != nil {
				if *container.SecurityContext.RunAsUser == UserID {

	sdscompare "istio.io/istio/istioctl/pkg/writer/compare/sds"
	"istio.io/istio/istioctl/pkg/writer/envoy/clusters"
	"istio.io/istio/istioctl/pkg/writer/envoy/configdump"
	"istio.io/istio/operator/pkg/util"
	"istio.io/istio/pilot/pkg/model"
	"istio.io/istio/pkg/config/host"
	"istio.io/istio/pkg/kube"
	"istio.io/istio/pkg/log"
)

const (
	jsonOutput             = "json"
	yamlOutput             = "yaml"

  @ParameterizedTest
  @ArgumentsSource(FileSystemParamProvider::class)
  fun iterator(parameters: Pair<FileSystem, Boolean>) {
    setUp(parameters.first, parameters.second)
    set("a", "a1", "a2")
    set("b", "b1", "b2")
    set("c", "c1", "c2")
    val iterator = cache.snapshots()
    assertThat(iterator.hasNext()).isTrue()
    iterator.next().use {
      assertThat(it.key()).isEqualTo("a")

// it will be stopped and joined.
TF_CAPI_EXPORT extern void TF_DeleteServer(TF_Server* server);

// Register a listener method that processes printed messages.
//
// If any listeners are registered, the print operator will call all listeners
// with the printed messages and immediately return without writing to the
// logs.
TF_CAPI_EXPORT extern void TF_RegisterLogListener(
    void (*listener)(const char*));

  }

  public void testSize1() {
    Iterator<Integer> iterator = singleton(0).iterator();
    assertEquals(1, Iterators.size(iterator));
  }

  public void testSize_partiallyConsumed() {
    Iterator<Integer> iterator = asList(1, 2, 3, 4, 5).iterator();
    iterator.next();
    iterator.next();
    assertEquals(3, Iterators.size(iterator));
  }

      UnmodifiableIterator<T> iterator) {
    return checkNotNull(iterator);
  }

  /**
   * Returns the number of elements remaining in {@code iterator}. The iterator will be left
   * exhausted: its {@code hasNext()} method will return {@code false}.
   */
  public static int size(Iterator<?> iterator) {
    long count = 0L;
    while (iterator.hasNext()) {
      iterator.next();
      count++;