internal override IList <IEnumerable <KeyValuePair <long, TSource> > > GetOrderedEnumerables(QueryOptions options)
{
ReverseList <TSource> reversed = new ReverseList <TSource> (source.ToListOrdered());
OrderablePartitioner <TSource> partitioner = ParallelPartitioner.CreateForStrips(reversed, 1);
return(WrapHelper.Wrap(partitioner.GetOrderablePartitions(options.PartitionCount)));
}