ListGrid : header for each row

Hi guys
I’m new with smartGwt. I’m developing a GUI for an application. I have a problem that I can’t resolve.
I have a ListGrid that takes the data from a xml file. I want put over each field a title. I can’t to do this. The only thing that I can do is put titles in the header of ListGrid. But the header is above all the lines that make up the ListGrid.
How can I put the header in each line?
Thank you for answer