// unwrap it after checking using `oldSelf.value()`. Check the CEL
	// documentation for Optional types for more information:
	// https://pkg.go.dev/github.com/google/cel-go/cel#OptionalTypes
	//
	// May not be set unless `oldSelf` is used in `rule`.
	//
	// +featureGate=CRDValidationRatcheting
	// +optional
	OptionalOldSelf *bool
}

// JSON represents any valid JSON value.

	// unwrap it after checking using `oldSelf.value()`. Check the CEL
	// documentation for Optional types for more information:
	// https://pkg.go.dev/github.com/google/cel-go/cel#OptionalTypes
	//
	// May not be set unless `oldSelf` is used in `rule`.
	//
	// +featureGate=CRDValidationRatcheting
	// +optional

	// unwrap it after checking using `oldSelf.value()`. Check the CEL
	// documentation for Optional types for more information:
	// https://pkg.go.dev/github.com/google/cel-go/cel#OptionalTypes
	//
	// May not be set unless `oldSelf` is used in `rule`.
	//
	// +featureGate=CRDValidationRatcheting
	// +optional

	env, err := cel.NewEnv(
		ext.Strings(ext.StringsVersion(2)),
		URLs(),
		Regex(),
		Lists(),
		Authz(),
		Quantity(),
		ext.Sets(),
		IP(),
		CIDR(),
		Format(),
		cel.OptionalTypes(),
		// cel-go v0.17.7 introduced CostEstimatorOptions.
		// Previous the presence has a cost of 0 but cel fixed it to 1. We still set to 0 here to avoid breaking changes.

  // unwrap it after checking using `oldSelf.value()`. Check the CEL
  // documentation for Optional types for more information:
  // https://pkg.go.dev/github.com/google/cel-go/cel#OptionalTypes
  //
  // May not be set unless `oldSelf` is used in `rule`.
  //
  // +featureGate=CRDValidationRatcheting
  // +optional
  optional bool optionalOldSelf = 6;
}

  // unwrap it after checking using `oldSelf.value()`. Check the CEL
  // documentation for Optional types for more information:
  // https://pkg.go.dev/github.com/google/cel-go/cel#OptionalTypes
  //
  // May not be set unless `oldSelf` is used in `rule`.
  //
  // +featureGate=CRDValidationRatcheting
  // +optional
  optional bool optionalOldSelf = 6;
}