name:             "Ratcheting, For creation, FG disabled, no OptionalOldSelf, no field drop",
			enableRatcheting: false,
			crd:              &apiextensions.CustomResourceDefinition{},
			oldCRD:           nil,
			expectedCRD:      &apiextensions.CustomResourceDefinition{},
		},
		{
			name:             "Ratcheting, For creation, FG disabled, set OptionalOldSelf, drop OptionalOldSelf",
			enableRatcheting: false,

	//
	// May not be set unless `oldSelf` is used in `rule`.
	//
	// +featureGate=CRDValidationRatcheting
	// +optional
	OptionalOldSelf *bool `json:"optionalOldSelf,omitempty" protobuf:"bytes,6,opt,name=optionalOldSelf"`
}

// JSON represents any valid JSON value.
// These types are supported: bool, int64, float64, string, []interface{}, map[string]interface{} and nil.
type JSON struct {

	// `transition rule`.
	//
	// By default, the `oldSelf` variable is the same type as `self`.
	// When `optionalOldSelf` is true, the `oldSelf` variable is a CEL optional
	//  variable whose value() is the same type as `self`.
	// See the documentation for the `optionalOldSelf` field for details.
	//
	// Transition rules by default are applied only on UPDATE requests and are

	//
	// May not be set unless `oldSelf` is used in `rule`.
	//
	// +featureGate=CRDValidationRatcheting
	// +optional
	OptionalOldSelf *bool `json:"optionalOldSelf,omitempty" protobuf:"bytes,6,opt,name=optionalOldSelf"`
}

// JSON represents any valid JSON value.
// These types are supported: bool, int64, float64, string, []interface{}, map[string]interface{} and nil.
type JSON struct {

		dropSelectableFields(&newCRD.Spec)
	}
}

// dropOptionalOldSelfField drops field optionalOldSelf from CRD schema
func dropOptionalOldSelfField(schema *apiextensions.JSONSchemaProps) {
	if schema == nil {
		return
	}
	for i := range schema.XValidations {
		schema.XValidations[i].OptionalOldSelf = nil
	}

	if schema.AdditionalProperties != nil {

	*out = *in
	if in.Reason != nil {
		in, out := &in.Reason, &out.Reason
		*out = new(FieldValueErrorReason)
		**out = **in
	}
	if in.OptionalOldSelf != nil {
		in, out := &in.OptionalOldSelf, &out.OptionalOldSelf
		*out = new(bool)
		**out = **in
	}
	return
}

// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new ValidationRule.

	*out = *in
	if in.Reason != nil {
		in, out := &in.Reason, &out.Reason
		*out = new(FieldValueErrorReason)
		**out = **in
	}
	if in.OptionalOldSelf != nil {
		in, out := &in.OptionalOldSelf, &out.OptionalOldSelf
		*out = new(bool)
		**out = **in
	}
	return
}

// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new ValidationRule.

	compResults := make([]CompilationResult, len(celRules))
	maxCardinality := maxCardinality(declType.MinSerializedSize)
	for i, rule := range celRules {
		ruleEnvSet := oldSelfEnvSet
		if rule.OptionalOldSelf != nil && *rule.OptionalOldSelf {
			ruleEnvSet = optionalOldSelfEnvSet
		}
		compResults[i] = compileRule(s, rule, ruleEnvSet, envLoader, estimator, maxCardinality, perCallLimit)
	}

	return compResults, nil
}

  // `transition rule`.
  //
  // By default, the `oldSelf` variable is the same type as `self`.
  // When `optionalOldSelf` is true, the `oldSelf` variable is a CEL optional
  //  variable whose value() is the same type as `self`.
  // See the documentation for the `optionalOldSelf` field for details.
  //
  // Transition rules by default are applied only on UPDATE requests and are

	*out = *in
	if in.Reason != nil {
		in, out := &in.Reason, &out.Reason
		*out = new(FieldValueErrorReason)
		**out = **in
	}
	if in.OptionalOldSelf != nil {
		in, out := &in.OptionalOldSelf, &out.OptionalOldSelf
		*out = new(bool)
		**out = **in
	}
	return
}

// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new ValidationRule.