// NamespaceOrDefault returns the namespace specified by the user, or the default namespace if none was specified
	NamespaceOrDefault(namespace string) string
	// CLIClientsForContexts returns clients for all the given contexts in a kubeconfig.
	CLIClientsForContexts(contexts []string) ([]kube.CLIClient, error)
}

type instance struct {
	// clients are cached clients for each revision
	clients map[string]kube.CLIClient