Aggregate Row in GXT 3 Grid

Hi Sencha team,

I have a question about the Grid. I'd like to include a summerized row in a basic grid using UI binder. I have no problem to do this.

However the problem is: How to add this summarized (aggregated) row at the beginning of the grid (First Row) ? Because the grid added it in the end (Last Row). I could not find any reference about how to change this.

Thanks in advance!

Paulo

Aggregate Row in GXT 3 Grid