m.compileMatcher.Do(func() {
		expressions := make([]cel.ExpressionAccessor, len(m.MutatingWebhook.MatchConditions))
		for i, matchCondition := range m.MutatingWebhook.MatchConditions {
			expressions[i] = &matchconditions.MatchCondition{
				Name:       matchCondition.Name,
				Expression: matchCondition.Expression,
			}
		}
		strictCost := false

		allErrs = append(allErrs, field.Invalid(fldPath.Child("matchConditions"), "", "matchConditions are not supported when StructuredAuthorizationConfiguration feature gate is disabled"))
	}
	if len(matchConditions) > 64 {
		allErrs = append(allErrs, field.TooMany(fldPath.Child("matchConditions"), len(matchConditions), 64))
		return nil, allErrs
	}

	return []error{}
}

var _ matchconditions.Matcher = &fakeCELMatcher{}

type fakeCELMatcher struct {
	error   error
	matches bool
}

func (f *fakeCELMatcher) Match(ctx context.Context, versionedAttr *admission.VersionedAttributes, versionedParams runtime.Object, authz authorizer.Authorizer) matchconditions.MatchResult {

	// across the file.

	// owner: @ivelichkovich, @tallclair
	// alpha: v1.27
	// beta: v1.28
	// stable: v1.30
	// kep: https://kep.k8s.io/3716
	//
	// Enables usage of MatchConditions fields to use CEL expressions for matching on admission webhooks
	AdmissionWebhookMatchConditions featuregate.Feature = "AdmissionWebhookMatchConditions"

	// owner: @jefftree @alexzielenski
	// alpha: v1.26

				},
			},
		},
		{
			name:               "match condition with one compilation error",
			attr:               aliceAttr,
			expectedCompileErr: "matchConditions[2].expression: Invalid value: \"('group3' in request.group)\": compilation failed: ERROR: <input>:1:21: undefined field 'group'\n | ('group3' in request.group)\n | ....................^",