presto-main/src/main/java/io/prestosql/sql/planner/planprinter/PlanPrinter.java/Visitor/printStatisticAggregationsInfo
class Visitor:        private void printStatisticAggregationsInfo(
                NodeRepresentation nodeOutput,
                Map<TableStatisticType, Symbol> tableStatistics,
                Map<ColumnStatisticMetadata, Symbol> columnStatistics,
                Map<Symbol, AggregationNode.Aggregation> aggregations)
        {
            nodeOutput.appendDetailsLine("aggregations =>");
            for (Map.Entry<TableStatisticType, Symbol> tableStatistic : tableStatistics.entrySet()) {
                nodeOutput.appendDetailsLine(indentString(1) + "%s => [%s := %s]",
                        tableStatistic.getValue(),
                        tableStatistic.getKey(),
                        formatAggregation(aggregations.get(tableStatistic.getValue())));
            }

            for (Map.Entry<ColumnStatisticMetadata, Symbol> columnStatistic : columnStatistics.entrySet()) {
                nodeOutput.appendDetailsLine(
                        indentString(1) + "%s[%s] => [%s := %s]",
                        columnStatistic.getKey().getStatisticType(),
                        columnStatistic.getKey().getColumnName(),
                        columnStatistic.getValue(),
                        formatAggregation(aggregations.get(columnStatistic.getValue())));
            }
        }