final Iterator it = getCells().iterator();
final Cell cell = it.hasNext() ? (Cell) it.next() : null;
if (cell != null) {
((CellImpl)cell).reset();
final Sheet sheet = cell.getSheet();
final BookImpl book = (BookImpl) sheet.getBook();
book.fireSSDataEvent(this, SSDataEvent.CONTENTS_CHANGE, 0);
}
}