type Client interface {
	Create(context.Context, *v1alpha1.StorageVersion, metav1.CreateOptions) (*v1alpha1.StorageVersion, error)
	UpdateStatus(context.Context, *v1alpha1.StorageVersion, metav1.UpdateOptions) (*v1alpha1.StorageVersion, error)
	Get(context.Context, string, metav1.GetOptions) (*v1alpha1.StorageVersion, error)
}

type Manager interface {
	// AddResourceInfo records resources whose StorageVersions need updates
	AddResourceInfo(resources ...*ResourceInfo)
	// UpdateStorageVersions tries to update the StorageVersions of the recorded resources
	UpdateStorageVersions(kubeAPIServerClientConfig *rest.Config, apiserverID string)
	// PendingUpdate returns true if the StorageVersion of the given resource is still pending update.
	PendingUpdate(gr schema.GroupResource) bool
	// LastUpdateError returns the last error hit when updating the storage version of the given resource.
	LastUpdateError(gr schema.GroupResource) error
	// Completed returns true if updating StorageVersions of all recorded resources has completed.
	Completed() bool
}

type ResourceInfo struct {
	GroupResource schema.GroupResource

	EncodingVersion string
	// Used to calculate decodable versions. Can only be used after all
	// equivalent versions are registered by InstallREST.
	EquivalentResourceMapper runtime.EquivalentResourceRegistry

	// DirectlyDecodableVersions is a list of versions that the converter for REST storage knows how to convert.  This
	// contains items like apiextensions.k8s.io/v1beta1 even if we don't serve that version.
	DirectlyDecodableVersions []schema.GroupVersion

	// ServedVersions holds a list of all versions of GroupResource that are served.  Note that a server may be able to
	// decode a particular version, but still not serve it.
	ServedVersions []string
}