Type:    "string",
							Default: jsonPtr("default"),
							XValidations: apiextensions.ValidationRules{
								{
									Rule:            "oldSelf.hasValue()",
									OptionalOldSelf: ptr.To(true),
									Message:         "foobarErrorMessage",
								},
							},
						},
					},
				},
			},
			errors: []string{"foobarErrorMessage"},
		},
		{

        x-kubernetes-preserve-unknown-fields: true
        x-kubernetes-validations:
        - fieldPath: fieldPathValue
          message: messageValue
          messageExpression: messageExpressionValue
          optionalOldSelf: true
          reason: reasonValue
          rule: ruleValue
    selectableFields:
    - jsonPath: jsonPathValue
    served: true
    storage: true
    subresources:
      scale:

                "message": "messageValue",
                "messageExpression": "messageExpressionValue",
                "reason": "reasonValue",
                "fieldPath": "fieldPathValue",
                "optionalOldSelf": true
              }
            ]
          }
        },
        "subresources": {
          "status": {},
          "scale": {
            "specReplicasPath": "specReplicasPathValue",

				allErrs = append(allErrs, celErrs...)

				if len(celErrs) == 0 && utilfeature.DefaultFeatureGate.Enabled(apiextensionsfeatures.CRDValidationRatcheting) {
					// If ratcheting is enabled some CEL rules may use optionalOldSelf
					// For such rules the above validation is not sufficient for
					// determining if the default value is a valid value to introduce
					// via create or uncorrelated update.
					//

	*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

							Type: "string",
							XValidations: []apiextensionsv1.ValidationRule{
								{
									Rule:            "!oldSelf.hasValue()",
									Message:         "oldSelf must be null",
									OptionalOldSelf: ptr(true),
								},
							},
						},
					},
				}},

				applyPatchOperation{
					"create instance passes since oldself is null",

	*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.