*/
@GwtCompatible
@ElementTypesAreNonnullByDefault
abstract class AbstractIterator<T extends @Nullable Object> implements Iterator<T> {
  private State state = State.NOT_READY;

  protected AbstractIterator() {}

  private enum State {
    READY,
    NOT_READY,
    DONE,
    FAILED,
  }

  @CheckForNull private T next;

  @CheckForNull
  protected abstract T computeNext();

  @CanIgnoreReturnValue

 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
abstract class AbstractIterator<T extends @Nullable Object> implements Iterator<T> {
  private State state = State.NOT_READY;

  protected AbstractIterator() {}

  private enum State {
    READY,
    NOT_READY,
    DONE,
    FAILED,
  }

  @CheckForNull private T next;

  @CheckForNull
  protected abstract T computeNext();

  @CanIgnoreReturnValue

  private State state = State.NOT_READY;

  /** Constructor for use by subclasses. */
  protected AbstractIterator() {}

  private enum State {
    /** We have computed the next element and haven't returned it yet. */
    READY,

    /** We haven't yet computed or have already returned the element. */
    NOT_READY,

    /** We have reached the end of the data and are finished. */

  private State state = State.NOT_READY;

  /** Constructor for use by subclasses. */
  protected AbstractIterator() {}

  private enum State {
    /** We have computed the next element and haven't returned it yet. */
    READY,

    /** We haven't yet computed or have already returned the element. */
    NOT_READY,

    /** We have reached the end of the data and are finished. */

  // CHECK: PartitionedCall
  // CHECK-SAME: f = @sub
  // CHECK-SAME: _cluster_launch = "not_ready"
  // CHECK-SAME: device = "noodle"
  %5 = "tf.Case"(%3, %4, %arg1) {branches = [@sub, @add], output_shapes = [#tf_type.shape<>], device= "noodle", _cluster_launch = "not_ready", is_stateless = false} : (tensor<i32>, tensor<f32>, tensor<f32>) -> tensor<f32>
  func.return %5 : tensor<f32>
}

	// we need second healthy node in tests. Because of how the tests are written we need to update
	// the status of this Node.
	healthyNodeNewStatus := v1.NodeStatus{
		Conditions: []v1.NodeCondition{
			{
				Type:   v1.NodeReady,
				Status: v1.ConditionTrue,
				// Node status has just been updated, and is NotReady for 10min.

		name           string
		node           api.Node
		oldNode        api.Node
		operation      admission.Operation
		options        runtime.Object
		expectedTaints []api.Taint
	}{
		{
			name:           "notReady taint is added on creation",
			node:           myNodeObj,
			operation:      admission.Create,
			options:        &metav1.CreateOptions{},
			expectedTaints: []api.Taint{notReadyTaint},
		},
		{

		},
		v1.NodePIDPressure: {
			v1.ConditionTrue: v1.TaintNodePIDPressure,
		},
	}

	taintKeyToNodeConditionMap = map[string]v1.NodeConditionType{
		v1.TaintNodeNotReady:           v1.NodeReady,
		v1.TaintNodeUnreachable:        v1.NodeReady,
		v1.TaintNodeNetworkUnavailable: v1.NodeNetworkUnavailable,
		v1.TaintNodeMemoryPressure:     v1.NodeMemoryPressure,
		v1.TaintNodeDiskPressure:       v1.NodeDiskPressure,

func namespacesReady(namespaces []corev1.Namespace) (bool, []string) {
	var notReady []string
	for _, namespace := range namespaces {
		if namespace.Status.Phase != corev1.NamespaceActive {
			notReady = append(notReady, "Namespace/"+namespace.Name)
		}
	}
	return len(notReady) == 0, notReady
}

func podsReady(pods []corev1.Pod) (bool, []string) {
	var notReady []string
	for _, pod := range pods {
		if !isPodReady(&pod) {

}

// getNotReadyNodes returns a string slice of nodes in the cluster that are NotReady
func getNotReadyNodes(nodes []v1.Node) []string {
	var notReadyNodes []string
	for _, node := range nodes {
		for _, condition := range node.Status.Conditions {
			if condition.Type == v1.NodeReady && condition.Status != v1.ConditionTrue {
				notReadyNodes = append(notReadyNodes, node.ObjectMeta.Name)
			}
		}