presto-orc/src/main/java/io/prestosql/orc/metadata/statistics/BloomFilter.java/BloomFilter/BloomFilter
class BloomFilter:    public BloomFilter(long expectedEntries, double fpp)
    {
        checkArgument(expectedEntries > 0, "expectedEntries should be > 0");
        checkArgument(fpp > 0.0 && fpp < 1.0, "False positive probability should be > 0.0 & < 1.0");
        int nb = optimalNumOfBits(expectedEntries, fpp);
        // make 'm' multiple of 64
        this.numBits = nb + (Long.SIZE - (nb % Long.SIZE));
        this.numHashFunctions = optimalNumOfHashFunctions(expectedEntries, numBits);
        this.bitSet = new BitSet(numBits);
    }