[POI] 병합된 셀 범위 가져오기

public CellRangeAddress returnMergedRange(List<CellRangeAddress> addresses, int rowIdx, int colIdx) {
    for(int i = 0; i < addresses.size(); i++) {
        CellRangeAddress range = addresses.get(i);
        if( rowIdx >= range.getFirstRow() && rowIdx <= range.getLastRow() && colIdx >= range.getFirstColumn() && colIdx <= range.getLastColumn() ) {
            return range;
        }
    }
    return null;
}