@Override
    public int hashCode() {
        return "ComparableComparator".hashCode();
    }
Implement a hash code for this comparator that is consistent with
{@link #equals(Object) equals}.

@return a hash code for this comparator.
@since 3.0
ttl2-compatible/src/main/java/com/alibaba/ttl/threadpool/ComparableComparator.java