},
		{
			name:     "single hit + error",
			delegate: fixedRESTMapper{kindsFor: []schema.GroupVersionKind{{Kind: "single-hit"}}, err: errors.New("delegateErr")},
			result:   schema.GroupVersionKind{Kind: "single-hit"},
			err:      "delegateErr",
		},
		{
			name: "group selection + error",
			delegate: fixedRESTMapper{kindsFor: []schema.GroupVersionKind{
				{Group: "one", Version: "a", Kind: "first"},

			input:  schema.GroupVersionResource{Resource: "foo"},
			result: nil,
			err:    errors.New("fail on this"),
		},
		{
			name: "union and dedup",
			mapper: MultiRESTMapper{
				fixedRESTMapper{kindsFor: []schema.GroupVersionKind{{Kind: "dupe"}, {Kind: "first"}}},

	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) {
	if err := o.init(); err != nil {

		return nil, &NoResourceMatchError{PartialResource: resource}
	}

	return allGVRs, nil
}

func (m MultiRESTMapper) KindsFor(resource schema.GroupVersionResource) (gvk []schema.GroupVersionKind, err error) {
	allGVKs := []schema.GroupVersionKind{}
	for _, t := range m {
		gvks, err := t.KindsFor(resource)
		// ignore "no match" errors, but any other error percolates back up
		if IsNoMatchError(err) {
			continue
		}

}

// 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)
	if originalErr != nil && len(originalGVKs) == 0 {

//
// 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
	KindsFor(resource schema.GroupVersionResource) ([]schema.GroupVersionKind, error)

	}

	sort.Sort(kindByPreferredGroupVersion{ret, m.defaultGroupVersions})
	return ret, nil
}

func (m *DefaultRESTMapper) 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
	}

	p.mapper = mapper
}

type doNothingRESTMapper struct{}

func (doNothingRESTMapper) KindFor(resource schema.GroupVersionResource) (schema.GroupVersionKind, error) {
	return schema.GroupVersionKind{}, nil
}
func (doNothingRESTMapper) KindsFor(resource schema.GroupVersionResource) ([]schema.GroupVersionKind, error) {
	return nil, nil
}

						Resource: resource,
					}
					resolved, err := c.RestMapper.KindsFor(gvr)
					if err != nil {
						if restMapperRefreshAttempted {
							// RESTMapper refresh happens at most once per policy
							continue
						}
						c.tryRefreshRESTMapper()
						restMapperRefreshAttempted = true
						resolved, err = c.RestMapper.KindsFor(gvr)
						if err != nil {
							continue
						}
					}

var _ meta.RESTMapper = &neverReturningRESTMapper{}

func (r *neverReturningRESTMapper) KindFor(resource schema.GroupVersionResource) (schema.GroupVersionKind, error) {
	// this ok because if the test works, this method should never be called.
	panic("test failed")
}
func (r *neverReturningRESTMapper) KindsFor(resource schema.GroupVersionResource) ([]schema.GroupVersionKind, error) {