func NewClientManager(gvs []schema.GroupVersion, addToSchemaFuncs ...func(s *runtime.Scheme) error) (ClientManager, error) {
	cache := lru.New(defaultCacheSize)
	hookScheme := runtime.NewScheme()
	for _, addToSchemaFunc := range addToSchemaFuncs {
		if err := addToSchemaFunc(hookScheme); err != nil {
			return ClientManager{}, err
		}
	}
	return ClientManager{
		cache: cache,