Want to add summary row at the top of grid

[raj123_a]

SmartGwt 3.1
Chrome browser

I am developing one college project. I want to add a summary row for listgrid. This summary row is by default at bottom. I want to show this summary row as the first row of the grid.

Please help me with the properties which I need to mention for this.

[Isomorphic]

See listGrid.gridComponents.