check specific checkbox

I have grid with several row with 2 columns of checkbox. If I check a checkbox of first col a row, I need uncheck the second checkbox of this row. but I can’t find method for check a specific checkbox of x-row and y-col.

There is some method to do this?

(Sorry for my bad english)

Set cell value on 1 with

var cell=grid.cells(rowId,col_Index);
if (cell.isCheckbox()) cell.setValue(1);

But: You don’t get the rowId correctly if the user click only the checkbox. See