presto-main/src/main/java/io/prestosql/cost/StatisticRange.java/StatisticRange/equals
class StatisticRange:    @Override
    public boolean equals(Object o)
    {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        StatisticRange that = (StatisticRange) o;
        return Double.compare(that.low, low) == 0 &&
                Double.compare(that.high, high) == 0 &&
                Double.compare(that.distinctValues, distinctValues) == 0;
    }