code: func (s PostgresObjectStore) Before(id string, count int, skip int, store string) (prows ObjectRows, err error) {
  	rows, err := s.db.Table(safeStoreName(store)).Select("raw").Where("id < ?", id).Limit(count).Offset(skip).Rows()
  	if err != nil {
  		if err == sql.ErrNoRows {
  			return nil, ErrNotFound
  		}
  		return
  	}
  	prows = PostgresRows{rows}
  	return
  }
docs: //This will retrieve all old rows that were created before the row with id was created
  // [1, 2, 3, 4], before 2 will return [3, 4]