function getCellPropertiesObject(rowIndex, dataModel) {
    return this.getCellOwnProperties(rowIndex, dataModel) || newCellPropertiesObject.call(this, rowIndex, dataModel);
}
@todo: Theoretically setData should call this method to ensure each cell's persisted properties object is properly recreated with prototype set to its column's properties object.
@this {Column}
@param {number} rowIndex - Data row coordinate.
@param {DataModel} [dataModel=this.dataModel]
@returns {object}
@private