object containing options :
row [type:integer] - The row ordinal of the cell in the template grid.
column [type:integer] - The column ordinal of this cell in the template grid.
rowSpan [type:integer] - The rowspan of this cell in the template grid.
colSpan [type:integer] - The colspan of this cell in the template grid.
templateCells [type:Array, elementType:dundas.controls.TemplateCellViewModel] - The template cells of this template cell group.