GridLayout handling

Hello everyone,

I wand to create a table with a complex header. The Table will present data from a bean, but before the first line I want to enter an array of strings (supplementary information about each column header).
The solution I decided to follow is to remove the header form the table and create a GridLayout and put it on top of this table, to simulate this view.
I know I exagerated and does not work well, but I haven’t found any other workaround to my problem. I use vaadin 7.1.1.
Please, can someone help me and give me any hint?

Thank you in advance,