code: public boolean canMergeRemainder(CompositeScore<S> other) {
          return getFilteringScore().canMergeRemainderFilter(other.getFilteringScore())
              && getOrderingScore().canMergeRemainderOrdering(other.getOrderingScore());
      }
docs: Returns true if the filtering score can merge its remainder filter and
  the ordering score can merge its remainder orderings.