anchor.diff:      }
   
       var req = ds.ParamRangeKey.$create(true,
  -        limit: pageSize,
  +        limit: desc ? pageSize * multiplier : pageSize,
           startKey: desc ? list.last.orig.key : list.first.orig.key);
   
       _fetchTs = now;
  
positive.code:     }
  
      var req = ds.ParamRangeKey.$create(empty,
          limit: empty ? pageSize + 1 : pageSize,
          startKey: empty ? null : (desc ? list.first.orig.key : list.last.orig.key));
  
      _fetchTs = now;
  
negative.code:   final MergeFn<T> mergeFn;
    final FetchFn fetchFn;
    final StoreState $state = new StoreState();
    final int multiplier;
  
    bool desc;
    List<Pair<T>> list, mainList;
  