@Override
    public void close() {
        super.close();
        hits = new ListenableArrayList<>(0);
        unmodifiableHits = null;
        hitOrderer = null;
        incomingHits.drain(); // Just to gc as much as possible
    }
Returns the incoming hit buffer to which new hits can be added to this asynchronous, if supported by the instance
container-search/src/main/java/com/yahoo/search/result/HitGroup.java