public boolean remove(Object o) {
    if(denseBag.containsKey(o)){
        if(denseBag.get(o) == 1L){
            denseBag.remove(o);
        } else {
            Long removed = denseBag.get(o);
            T theO = (T) o;
            denseBag.replace(theO, removed, removed--);
        }
    } else {
        return false;
    }