Datatable: Row wise header , similar as provided by pivot

Can I get the header for every row in the datatable and apply complex header like rowspan in it.
For more clearity like in http://pivot.webix.com/ e.g. row wise header is there {Republic: Argentina, Austria, … ) etc.

And on this header I want to perform complex header operation like in this http://webix.com/snippet/33a14753 e.g.
Overall I want that data should now place itselft on the right side of the header structure in (http://webix.com/snippet/33a14753) rather than to the down of the header structure.

I hope I made myself clear on this requirement.

This part of grid is based on the data, you can’t just configure it as header. What is possible:

• form data for the datatable in such way, that it will have necessary structure
  or
• load data as is, but before loading it to datatable, modify by adding necessary text for necessary rows.