code: func (act *MineActivity) Next() bool {
  	if act.err != nil {
  		return false
  	}
  	insta := act.inst
  	body, err := insta.sendRequest(
  		&reqOptions{
  			Endpoint: urlActivityRecent,
  			Query: map[string]string{
  				"max_id": strconv.FormatInt(act.NextID, 10),
  			},
  			IsPost: false,
  		},
  	)
  	if err == nil {
  		act2 := MineActivity{}
  		err = json.Unmarshal(body, &act2)
  		if err == nil {
  			*act = act2
  			act.inst = insta
  			if len(act.Stories) == 0 || act.NextID == 0 {
  				act.err = ErrNoMore
  			}
  			return true
  		}
  	}
  	act.err = err
  	return false
  }
docs: // Next function allows pagination over notifications.
  //
  // See example: examples/activity/recent.go