function Range(startCell, endCell) {
    _classCallCheck(this, Range);

    this._startCell = startCell;
    this._endCell = endCell;

    this._findRangeExtent(startCell, endCell);
  }
//  * Creates a new instance of Range.
  //  * @param {Cell} startCell - The start cell.
  //  * @param {Cell} endCell - The end cell.
  //