docs: private static OrderByPlanNode buildOrderByPlanNode(List<ParsedColInfo> cols) {
          OrderByPlanNode n = new OrderByPlanNode();
  
          for (ParsedColInfo col : cols) {
              n.addSortExpression(col.m_expression,
                      col.m_ascending ? SortDirectionType.ASC
                                    : SortDirectionType.DESC);
          }
  
          return n;
      }