public ValueEval getEvalForCell(int rowIndex, int columnIndex) {return _bookEvaluator.evaluateReference(getSheet(), _sheetIndex, rowIndex, columnIndex, _tracker);}
public ValueEval GetEvalForCell(int rowIndex, int columnIndex){return _bookEvaluator.EvaluateReference(this.Sheet, _sheetIndex, rowIndex, columnIndex, _tracker);}