Function Sleep

internal/util.go:37–47

(ctx context.Context, dur time.Duration)

}

func Sleep(ctx context.Context, dur time.Duration) error {
	t := time.NewTimer(dur)
	defer t.Stop()

	select {
	case <-t.C:
		return nil
	case <-ctx.Done():
		return ctx.Err()
	}
}

func ToLower(s string) string {
	if isLower(s) {