}
		r, err := labels.NewRequirement(expr.Key, op, append([]string(nil), expr.Values...))
		if err != nil {
			return nil, err
		}
		requirements = append(requirements, *r)
	}
	selector := labels.NewSelector()
	selector = selector.Add(requirements...)
	return selector, nil
}

// LabelSelectorAsMap converts the LabelSelector api type into a map of strings, ie. the

        } else if (Implementation.MODULE.getId() == id) {
            return DefaultModuleComponentSelector.newSelector(DefaultModuleIdentifier.newId(decoder.readString(), decoder.readString()), readVersionConstraint(decoder), readAttributes(decoder), readCapabilities(decoder));
        } else if (Implementation.LIBRARY.getId() == id) {

        }

        private ModuleVersionNotFoundException missing(VersionSelector prefer) {
            def moduleComponentSelector = DefaultModuleComponentSelector.newSelector(DefaultModuleIdentifier.newId(moduleId.group, moduleId.name), prefer.selector)
            return new ModuleVersionNotFoundException(moduleComponentSelector, [])
        }
    }

	logger.V(4).Info("Resyncing PV controller")

	pvcs, err := ctrl.claimLister.List(labels.NewSelector())
	if err != nil {
		logger.Info("Cannot list claims", "err", err)
		return
	}
	for _, pvc := range pvcs {
		ctrl.enqueueWork(ctx, ctrl.claimQueue, pvc)
	}

	pvs, err := ctrl.volumeLister.List(labels.NewSelector())
	if err != nil {
		logger.Info("Cannot list persistent volumes", "err", err)
		return
	}

		t.Errorf("Selector for nil set should be Empty")
	}
}

func TestSetIsEmpty(t *testing.T) {
	if !(Set{}).AsSelector().Empty() {
		t.Errorf("Empty set should be empty")
	}
	if !(NewSelector()).Empty() {
		t.Errorf("Nil Selector should be empty")
	}
}

func TestLexer(t *testing.T) {
	testcases := []struct {
		s string
		t Token
	}{
		{"", EndOfStringToken},

		componentRequirement, err := klabels.NewRequirement(IstioComponentLabelStr, selection.Exists, nil)
		if err != nil {
			return usList, err
		}
		if includeClusterResources {
			s := klabels.NewSelector()
			err = h.client.List(context.TODO(), objects,
				client.MatchingLabelsSelector{Selector: s.Add(*componentRequirement)})
		} else {
			// do not prune base components or unknown components
			includeCN := []string{

var sharedNothingSelector Selector = nothingSelector{}

// Nothing returns a selector that matches no labels
func Nothing() Selector {
	return sharedNothingSelector
}

// NewSelector returns a nil selector
func NewSelector() Selector {
	return internalSelector(nil)
}

type internalSelector []Requirement

func (s internalSelector) DeepCopy() internalSelector {
	if s == nil {
		return nil
	}

	slices        kclient.Client[*v1.EndpointSlice]
	c             *Controller
}

var (
	endpointSliceRequirement = labelRequirement(mcs.LabelServiceName, selection.DoesNotExist, nil)
	endpointSliceSelector    = klabels.NewSelector().Add(*endpointSliceRequirement)
)

func newEndpointSliceController(c *Controller) *endpointSliceController {
	slices := kclient.NewFiltered[*v1.EndpointSlice](c.client, kclient.Filter{ObjectFilter: c.client.ObjectFilter()})

		ss[ls[i]] = ls[i+1]
	}
	return ss
}

func selector(ss ...string) pkglabels.Selector {
	if len(ss)%2 != 0 {
		panic("selector requires pairs of strings.")
	}
	s := pkglabels.NewSelector()
	for i := 0; i < len(ss); i += 2 {
		r, err := pkglabels.NewRequirement(ss[i], selection.Equals, []string{ss[i+1]})
		if err != nil {
			panic(err)
		}
		s = s.Add(*r)
	}
	return s
}

	// on its own; therfore, the only way to test selector immutability is
	// when the new selector is changed but still matches the existing labels.
	newSelector := getValidGeneratedSelector()
	newSelector.MatchLabels["foo"] = "bar"
	validTolerations := []api.Toleration{{
		Key:      "foo",
		Operator: api.TolerationOpEqual,
		Value:    "bar",
		Effect:   api.TaintEffectPreferNoSchedule,