return nil, &NoResourceMatchError{PartialResource: resource}
	}

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

func (m *DefaultRESTMapper) ResourceFor(resource schema.GroupVersionResource) (schema.GroupVersionResource, error) {
	resources, err := m.ResourcesFor(resource)
	if err != nil {
		return schema.GroupVersionResource{}, err
	}
	if len(resources) == 1 {

	// this ok because if the test works, this method should never be called.
	panic("test failed")
}
func (r *neverReturningRESTMapper) ResourceFor(input schema.GroupVersionResource) (schema.GroupVersionResource, error) {
	// this ok because if the test works, this method should never be called.
	panic("test failed")
}