text: public String getFormatString(int formatIndex) {String format = null;if (formatIndex >= HSSFDataFormat.getNumberOfBuiltinBuiltinFormats()) {FormatRecord tfr = _customFormatRecords.get(Integer.valueOf(formatIndex));if (tfr == null) {logger.log( POILogger.ERROR, "Requested format at index " + formatIndex+ ", but it wasn't found");} else {format = tfr.getFormatString();}} else {format = HSSFDataFormat.getBuiltinFormat((short) formatIndex);}return format;}