text: public String toFormulaString() {StringBuilder sb = new StringBuilder(64);boolean needsExclamation = false;if (externalWorkbookNumber >= 0) {sb.append('[');sb.append(externalWorkbookNumber);sb.append(']');needsExclamation = true;}if (sheetName != null) {SheetNameFormatter.appendFormat(sb, sheetName);needsExclamation = true;}if (needsExclamation) {sb.append('!');}sb.append(nameName);return sb.toString();}