code: public void setIndexForItems(final Map<String, Integer> columnLabelIndexMap) {
          setIndexForAggregationItem(columnLabelIndexMap);
          setIndexForOrderItem(columnLabelIndexMap, orderByItems);
          setIndexForOrderItem(columnLabelIndexMap, groupByItems);
      }
docs: Set index for select items.
  
  @param columnLabelIndexMap map for column label and index