presto-main/src/main/java/io/prestosql/sql/planner/planprinter/OperatorInputStats.java/OperatorInputStats/OperatorInputStats
class OperatorInputStats:    public OperatorInputStats(long totalDrivers, long inputPositions, double sumSquaredInputPositions)
    {
        this.totalDrivers = totalDrivers;
        this.inputPositions = inputPositions;
        this.sumSquaredInputPositions = sumSquaredInputPositions;
    }