@Override
    public int getTotalRequestsCount(Task task) {
        return getDuplicateRemover().getTotalRequestsCount(task);
    }
Priority scheduler. Request with higher priority will poll earlier. <br>

@author code4crafter@gmail.com <br>
@since 0.2.1
webmagic-core/src/main/java/us/codecraft/webmagic/scheduler/PriorityScheduler.java