code: function recalculateWidths(tableGrid, widths) {
          var allCells = tableGrid.getAllCells();
          return Tools.map(allCells, function (cell) {
            var width = total(cell.colIndex, cell.colIndex + cell.colspan, widths);
            return {
              element: cell.element,
              width: width,
              colspan: cell.colspan
            };
          });
        }
docs: Combine cell's css widths to determine widths of colspan'd cells.