presto-main/src/main/java/io/prestosql/cost/FilterStatsCalculator.java/FilterStatsCalculator/FilterStatsCalculator
class FilterStatsCalculator:    public FilterStatsCalculator(Metadata metadata, ScalarStatsCalculator scalarStatsCalculator, StatsNormalizer normalizer)
    {
        this.metadata = requireNonNull(metadata, "metadata is null");
        this.scalarStatsCalculator = requireNonNull(scalarStatsCalculator, "scalarStatsCalculator is null");
        this.normalizer = requireNonNull(normalizer, "normalizer is null");
        this.literalEncoder = new LiteralEncoder(metadata);
    }