* @param changed hold the changed range because of this offset row
* @return the result row index after the offset.
*/
/*package*/ int offsetRow(int offset, Map changed) {
if (_matrix.isUiRelated()) {
final Sheet sheet = _matrix.getSheet();
for (final Iterator it = _cells.iterator(); it.hasNext(); ) {
final CellIndex ci = (CellIndex) it.next();
ci.collectChangedRanges(sheet, offset, 0, changed);
}
}