I have done a dojo dgrid, where I have a tree field(Plugin Column). I am trying put icons(PDF, HTML and XLS) in each subrow for the user to do download. I tried to use formatter: function(item, rowIndex, cell) for create the icons, but it damages my tree column, simply stops work. I did not find anything like what I want to do on the documentation.
The following image show my example:

I tried mix HTML, as well, but did not work, and I would not like to do it this way, mixing HTML with my javascript.
How can I do this?
I don’t know if it is the best solution, but I solved this way.
I created a new column(plugin column), and across CSS I took out the vertical line between the columns(for simulate a colspan). But you can do colspan through dgrid, but I prefered through CSS(easier).
My plugin column stayed like this:
Thanks