@Override
    public void resetDuplicateCheck(Task task) {
        rebuildBloomFilter();
    }
@param expectedInsertions the number of expected insertions to the constructed
@param fpp the desired false positive probability (must be positive and less than 1.0)
webmagic-extension/src/main/java/us/codecraft/webmagic/scheduler/BloomFilterDuplicateRemover.java