InUse(ctx context.Context) (bool, error)
}

const probeObject = "probeobject"

// checkWarmBackend checks if tier config credentials have sufficient privileges
// to perform all operations defined in the WarmBackend interface.
func checkWarmBackend(ctx context.Context, w WarmBackend) error {
	remoteVersionID, err := w.Put(ctx, probeObject, strings.NewReader("MinIO"), 5)
	if err != nil {

// operations on the corresponding warmbackend.
func (config *TierConfigMgr) Verify(ctx context.Context, tier string) error {
	d, err := config.getDriver(ctx, tier)
	if err != nil {
		return err
	}
	return checkWarmBackend(ctx, d)
}

// Empty returns if tier targets are empty
func (config *TierConfigMgr) Empty() bool {
	if config == nil {
		return true
	}
	return len(config.ListTiers()) == 0
}