return m.MarshalToSizedBuffer(dAtA[:size])
}

func (m *ValidationRule) MarshalToSizedBuffer(dAtA []byte) (int, error) {
	i := len(dAtA)
	_ = i
	var l int
	_ = l
	if m.OptionalOldSelf != nil {
		i--
		if *m.OptionalOldSelf {
			dAtA[i] = 1
		} else {
			dAtA[i] = 0
		}
		i--
		dAtA[i] = 0x30
	}
	i -= len(m.FieldPath)
	copy(dAtA[i:], m.FieldPath)

## Changelog since v1.29.0

## Changes by Kind

### API Change

   ([#123516](https://github.com/kubernetes/kubernetes/pull/123516), [@pohly](https://github.com/pohly))
- Fixed accidental enablement of the new alpha `optionalOldSelf` API field in `CustomResourceDefinition` validation rules, which should only have been allowed to be set when the `CRDValidationRatcheting` feature gate is enabled.

							Default:     "",

          "type": "string"