o.loaded = true
	return o.err
}

var _ ResettableRESTMapper = &lazyObject{}

func (o *lazyObject) KindFor(resource schema.GroupVersionResource) (schema.GroupVersionKind, error) {
	if err := o.init(); err != nil {
		return schema.GroupVersionKind{}, err
	}
	return o.mapper.KindFor(resource)
}

func (o *lazyObject) KindsFor(resource schema.GroupVersionResource) ([]schema.GroupVersionKind, error) {

		errors = append(errors, err)
	}

	return schema.GroupVersionResource{}, collapseAggregateErrors(errors)
}

func (m FirstHitRESTMapper) KindFor(resource schema.GroupVersionResource) (schema.GroupVersionKind, error) {
	errors := []error{}
	for _, t := range m.MultiRESTMapper {
		ret, err := t.KindFor(resource)
		if err == nil {
			return ret, nil
		}
		errors = append(errors, err)
	}

func (m fixedRESTMapper) ResourceFor(resource schema.GroupVersionResource) (schema.GroupVersionResource, error) {
	return m.resourceFor, m.err
}

func (m fixedRESTMapper) KindFor(resource schema.GroupVersionResource) (schema.GroupVersionKind, error) {
	return m.kindFor, m.err
}

func (m fixedRESTMapper) RESTMapping(gk schema.GroupKind, versions ...string) (mapping *RESTMapping, err error) {
	return nil, m.err
}

// unique across groups.
//
// TODO: split into sub-interfaces
type RESTMapper interface {
	// KindFor takes a partial resource and returns the single match.  Returns an error if there are multiple matches
	KindFor(resource schema.GroupVersionResource) (schema.GroupVersionKind, error)

	// KindsFor takes a partial resource and returns the list of potential kinds in priority order

				mapper.RegisterKindFor(data.gvr, data.subresource, data.gvk)
			}
			// verify
			for _, data := range kindsToRegister {
				if kind := mapper.KindFor(data.gvr, data.subresource); kind != data.gvk {
					t.Errorf("KindFor(%#v, %v) returned %#v, expected %#v", data.gvr, data.subresource, kind, data.gvk)
				}
			}

			// Verify equivalents to primary resource

	}

	return schema.GroupVersionResource{}, &AmbiguousResourceError{PartialResource: partiallySpecifiedResource, MatchingResources: originalGVRs}
}

// KindFor finds all kinds, then passes them through the KindPriority patterns to find a single matching hit.
func (m PriorityRESTMapper) KindFor(partiallySpecifiedResource schema.GroupVersionResource) (schema.GroupVersionKind, error) {
	originalGVKs, originalErr := m.Delegate.KindsFor(partiallySpecifiedResource)

	r.mutex.RLock()
	defer r.mutex.RUnlock()
	return r.resources[r.keys[resource.GroupResource()]][subresource]
}
func (r *equivalentResourceRegistry) KindFor(resource schema.GroupVersionResource, subresource string) schema.GroupVersionKind {
	r.mutex.RLock()
	defer r.mutex.RUnlock()
	return r.kinds[resource][subresource]
}

	if len(resources) == 1 {
		return resources[0], nil
	}

	return schema.GroupVersionResource{}, &AmbiguousResourceError{PartialResource: resource, MatchingResources: resources}
}

func (m MultiRESTMapper) KindFor(resource schema.GroupVersionResource) (schema.GroupVersionKind, error) {
	kinds, err := m.KindsFor(resource)
	if err != nil {
		return schema.GroupVersionKind{}, err
	}
	if len(kinds) == 1 {
		return kinds[0], nil

		mapper := NewDefaultRESTMapper([]schema.GroupVersion{testGroupVersion})
		if len(testCase.ExpectedGVK.Kind) != 0 {
			mapper.Add(testCase.ExpectedGVK, RESTScopeNamespace)
		}
		actualGVK, err := mapper.KindFor(testCase.Resource)

		hasErr := err != nil
		if hasErr != testCase.Err {
			t.Errorf("%d: unexpected error behavior %t: %v", i, testCase.Err, err)
			continue
		}
		if err != nil {
			continue
		}

			m := rules.Matcher{
				Rule: rule,
				Attr: attrWithOverride,
			}
			if !m.Matches() {
				continue
			}
			matchKind = o.GetEquivalentResourceMapper().KindFor(equivalent, attr.GetSubresource())
			if matchKind.Empty() {
				return false, schema.GroupVersionResource{}, schema.GroupVersionKind{}, fmt.Errorf("unable to convert to %v: unknown kind", equivalent)
			}