The "range" clause in a "for-range" loop now accepts iterator functions of the following types

	func(func() bool)
	func(func(K) bool)
	func(func(K, V) bool)

as range expressions.
Calls of the iterator argument function produce the iteration values for the "for-range" loop.
For details see the [language spec](/ref/spec#For_statements).

	operatprv1alpha1 "istio.io/api/operator/v1alpha1"
	"istio.io/istio/istioctl/pkg/clioptions"
	operator_istio "istio.io/istio/operator/pkg/apis/istio"
	"istio.io/istio/operator/pkg/apis/istio/v1alpha1"
	"istio.io/istio/operator/pkg/controlplane"
	"istio.io/istio/operator/pkg/helmreconciler"
	"istio.io/istio/operator/pkg/manifest"
	"istio.io/istio/operator/pkg/translate"
	"istio.io/istio/operator/pkg/util"

	RF_PANIC                          // body of loop is either currently running, or has panicked
	RF_EXHAUSTED                      // iterator function return, i.e., sequence is "exhausted"
	RF_MISSING_PANIC = 4              // body of loop panicked but iterator function defer-recovered it away

        val key = ModelKey(identityPath, modelName, parameter?.hash)
        return loadOrCreateValue(key) {
            try {
                val model = if (identityPath != null) {
                    cacheFingerprintController.runCollectingFingerprintForProject(identityPath, creator)
                } else {
                    creator()
                }

        @Override
        public boolean isEmpty() {
            return getDelegate(false).isEmpty();
        }

        @Override
        public Iterator<T> iterator() {
            return new MutationSafeIterator(getDelegate(false).iterator());
        }

        @Override
        public boolean remove(Object o) {
            return getDelegate(true).remove(o);
        }

        @Override

func (s *LabelSelectorWrapper) NotIn(key string, vals []string) *LabelSelectorWrapper {
	expression := metav1.LabelSelectorRequirement{
		Key:      key,
		Operator: metav1.LabelSelectorOpNotIn,
		Values:   vals,
	}
	s.MatchExpressions = append(s.MatchExpressions, expression)
	return s
}

import (
	"cmp"
	"iter"
)

// All returns an iterator over index-value pairs in the slice.
// The indexes range in the usual order, from 0 through len(s)-1.
func All[Slice ~[]E, E any](s Slice) iter.Seq2[int, E] {
	return func(yield func(int, E) bool) {
		for i, v := range s {
			if !yield(i, v) {
				return
			}
		}
	}
}

// Backward returns an iterator over index-value pairs in the slice,

    }

    override val size: Int
        get() = withValidityAssertion { coneType.customAnnotations.size }

    override fun iterator(): Iterator<KaAnnotation> = withValidityAssertion {
        return backingAnnotations.iterator()
    }

    override fun get(index: Int): KaAnnotation = withValidityAssertion {
        return backingAnnotations[index]
    }

            }
            val stringProvider = providers
                .$operator("string")
                .orElse($orElseArgument)
            tasks.register<PrintString>("printString") {
                string.set(stringProvider)
            }
        """
        def printString = { string ->
            switch (operator) {
                case 'systemProperty':

      tolerations:
        # Make sure istio-cni-node gets scheduled on all nodes.
        - effect: NoSchedule
          operator: Exists
        # Mark the pod as a critical add-on for rescheduling.
        - key: CriticalAddonsOnly
          operator: Exists
        - effect: NoExecute
          operator: Exists
      priorityClassName: system-node-critical
      serviceAccountName: {{ template "name" . }}