code: func (n NamespacedKV) Time(key string) (time.Time, bool) {
  	var t time.Time
  	valBs, err := n.db.Get(n.prefixedKey(key), nil)
  	if err != nil {
  		return t, false
  	}
  	err = t.UnmarshalBinary(valBs)
  	return t, err == nil
  }
docs: // Time returns the stored value interpreted as a time.Time and a boolean
  // that is false if no value was stored at the key.