public IResultSetFilter Instantiate(IRankingInfo rankingInfo, IEnumerable <IColumnDefinitionLight> columns)
{
var groupingFactory = new ByColumnGroupingFactory();
var grouping = groupingFactory.Instantiate(columns);
var rankingFactory = new RankingFactory();
var ranking = rankingFactory.Instantiate(rankingInfo);
return(new FilterGroupByFilter(ranking, grouping));
}