// Group by + Order by public DataNode <string, Cell> Groupby(IEnumerable <string> indexColumns, string leafColumn) { if (_grouper == null) { _grouper = new TableGrouper(_dataTbl); } return(_grouper.GroupBy(indexColumns, leafColumn)); }
private void FetchTable() { _dataTbl = _dataProvider.Fetch(); _grouper = new TableGrouper(_dataTbl); }