public String toFormulaString() {StringBuilder sb = new StringBuilder(64);if (externalWorkbookNumber >= 0) {sb.append('[');sb.append(externalWorkbookNumber);sb.append(']');}if (sheetName != null) {SheetNameFormatter.appendFormat(sb, sheetName);}sb.append('!');sb.append(FormulaError.REF.getString());return sb.toString();}

public override String ToFormulaString(){StringBuilder sb = new StringBuilder();if (externalWorkbookNumber >= 0){sb.Append('[');sb.Append(externalWorkbookNumber);sb.Append(']');}if (sheetName != null){sb.Append(sheetName);}sb.Append('!');sb.Append(ErrorConstants.GetText(ErrorConstants.ERROR_REF));return sb.ToString();}
