return isXIntOrString(s.Schema)
}

func (s *Schema) IsXEmbeddedResource() bool {
	return isXEmbeddedResource(s.Schema)
}

func (s *Schema) IsXPreserveUnknownFields() bool {
	return isXPreserveUnknownFields(s.Schema)
}

func (s *Schema) XListType() string {
	return getXListType(s.Schema)
}

func (s *Schema) XMapType() string {
	return getXMapType(s.Schema)
}

	return schema.Format == intOrStringFormat || isExtension(schema, extIntOrString)
}

func isXEmbeddedResource(schema *spec.Schema) bool {
	return isExtension(schema, extEmbeddedResource)
}

func isXPreserveUnknownFields(schema *spec.Schema) bool {
	return isExtension(schema, extPreserveUnknownFields)
}

func getXListType(schema *spec.Schema) string {
	s, _ := schema.Extensions.GetString(extListType)
	return s
}

	AnyOf() []Schema
	Not() Schema
}

// KubeExtensions contains Kubernetes-specific extensions to the OpenAPI schema.
type KubeExtensions interface {
	IsXIntOrString() bool
	IsXEmbeddedResource() bool
	IsXPreserveUnknownFields() bool
	XListType() string
	XListMapKeys() []string
	XMapType() string
	XValidations() []ValidationRule
}

// ValidationRule represents a single x-kubernetes-validations rule.

func (s *Structural) IsXIntOrString() bool {
	return s.Structural.XIntOrString
}

func (s *Structural) IsXEmbeddedResource() bool {
	return s.Structural.XEmbeddedResource
}

func (s *Structural) IsXPreserveUnknownFields() bool {
	return s.Structural.XPreserveUnknownFields
}

func (s *Structural) XListType() string {
	if s.Structural.XListType == nil {
		return ""
	}
	return *s.Structural.XListType
}

	if schema.Type() == "boolean" {
		b, ok := unstructured.(bool)
		if !ok {
			return types.NewErr("invalid data, expected bool, got %T", unstructured)
		}
		return types.Bool(b)
	}

	if schema.IsXPreserveUnknownFields() {
		return &unknownPreserved{u: unstructured}
	}