Result containing the following:
mergerCell [type: "dundas.controls.TemplateCellViewModel"] - the cell that other cells are merged into.
mergedCells [type: "Array", elementType: "dundas.controls.TemplateCellViewModel"] - The cells that got merged.
templateCells [type: "Array", elementType: "dundas.controls.TemplateCellViewModel"] - The set of template cells after merging.