}

// Cache contains a synchronized value that is considered valid
// for a specific amount of time.
// An Update function must be set to provide an updated value when needed.
type Cache[T any] struct {
	// updateFn must return an updated value.
	// If an error is returned the cached value is not set.
	// Only one caller will call this function at any time, others will be blocking.
	// The returned value can no longer be modified once returned.

	}

	buf, err := r.MarshalMsg(nil)
	if err != nil {
		return nil, err
	}

	// We do not want Gets to take so much time, anything
	// beyond 250ms we should cut it, remote cache is too
	// busy already.
	ctx, cancel := context.WithTimeout(context.Background(), 250*time.Millisecond)
	defer cancel()

	req, err := http.NewRequestWithContext(ctx, http.MethodPost, c.Endpoint+mcacheV1Check, bytes.NewReader(buf))