How to create row grouping for more than 1 column

ib1999

I need to create table that row grouping for more than one column, I found way for grouping one column, but I need to group it again, so I have data with column: group, subGroup, subSubGroup, detail1, detail2, subGroup and subsubGroup is also row grouping but I cannot do it. Here is the link for row grouping, I can do it but only for one column the most left one:

http://datatables.net/release-datatables/extras/FixedColumns/row_grouping_height.html

Regards,
Imam