text: public ValueEval evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0) {ValueEval arg = arg0;if (arg instanceof RefEval) {RefEval re = (RefEval)arg;arg = re.getInnerValueEval(re.getFirstSheetIndex());} else if (arg instanceof AreaEval) {arg = ((AreaEval) arg).getRelativeValue(0, 0);}if (arg instanceof StringEval) {return arg;}if (arg instanceof ErrorEval) {return arg;}return StringEval.EMPTY_INSTANCE;}