timeout := time.After(10 * time.Second)
	select {
	case <-timeout:
		t.Fatalf("timeout waiting to be done")
	case <-done:
		return
	}
}

// CheckCacheSync validates operational invariants of a cache against the
// non-cached client.
func CheckCacheSync(store model.ConfigStore, cache model.ConfigStoreController, namespace string, n int, t *testing.T) {
	keys := make(map[int]config2.Config)