presto-main/src/main/java/io/prestosql/sql/planner/planprinter/OperatorHashCollisionsStats.java/OperatorHashCollisionsStats/getWeightedSumSquaredHashCollisions
class OperatorHashCollisionsStats:    public double getWeightedSumSquaredHashCollisions()
    {
        return weightedSumSquaredHashCollisions;
    }