src/org/tiefaces/components/websheet/configuration/FormCommand.java
private List<Integer> buildFormWatchList(
			final XSSFEvaluationWorkbook wbWrapper, final Sheet sheet) {

		List<Integer> watchList = new ArrayList<>();

		ConfigRange cRange = this.getConfigRange();
		List<ConfigCommand> commandList = cRange.getCommandList();
		if (commandList.isEmpty()) {
			// if no command then no dynamic changes. then no need formula
			// shifts.
			return watchList;
		}
		int lastStaticRow = commandList.get(0).getTopRow() - 1;
		if (lastStaticRow < 0) {
			lastStaticRow = this.getTopRow();
		}

		int sheetIndex = sheet.getWorkbook().getSheetIndex(sheet);

		for (int i = this.getTopRow(); i <= this.getLastRow(); i++) {
			Row row = sheet.getRow(i);
			for (Cell cell : row) {
				if (cell.getCellTypeEnum() == CellType.FORMULA) {

					buildWatchListForCell(wbWrapper, sheetIndex, cell,
							watchList, lastStaticRow);

				}
			}
		}

		return watchList;

	}
private List<Integer> buildFormWatchList(
			final XSSFEvaluationWorkbook wbWrapper, final Sheet sheet) {

		List<Integer> watchList = new ArrayList<>();

		ConfigRange cRange = this.getConfigRange();
		List<ConfigCommand> commandList = cRange.getCommandList();
		if (commandList.isEmpty()) {
			// if no command then no dynamic changes. then no need formula
			// shifts.
			return watchList;
		}
		int lastStaticRow = commandList.get(0).getTopRow() - 1;
		if (lastStaticRow < 0) {
			lastStaticRow = this.getTopRow();
		}

		int sheetIndex = sheet.getWorkbook().getSheetIndex(sheet);

		for (int i = this.getTopRow(); i <= this.getLastRow(); i++) {
			Row row = sheet.getRow(i);
			for (Cell cell : row) {
				if (cell.getCellTypeEnum() == CellType.FORMULA) {

					buildWatchListForCell(wbWrapper, sheetIndex, cell,
							watchList, lastStaticRow);

				}
			}
		}

		return watchList;

	}
Watch list serve for formula changes. Basically all the rows appeared in
the formula in the current sheet will be watched. Note if the cell
reference is from other sheet or workbooks, it will be ignored.

@param wbWrapper
XSSFEvaluationWorkbook used for formula parse.
@param sheet
current sheet.
@return List row number for monitoring.