Merge columns in Shinobi grid

Question

I just wanted to know whether we can make a number of columns to merge to a group and set a group title above these columns? I use SDataGridColumn to create the columns. But could not find a way to merge them.

Sample Table

If it is not supported by Shinobi Controlls, how can I achieve this functionality? Just setting UILabel above the columns will not work, as my table has lots of columns that scrolls to right/left. And it is not possible to scroll the UILabel as the Shinobi table scrolls.

Thanks in advance.