src/org/tiefaces/components/websheet/utility/CellUtility.java
public static TieCell getOrAddTieCellInMap(final Cell poiCell, HashMap<String, TieCell> tieCells) {
		String skey = CellUtility.getSkeyFromPoiCell(poiCell);
		TieCell tieCell = tieCells.get(skey);
		if (tieCell == null) {
			tieCell = new TieCell();
			tieCell.setSkey(skey);
			tieCells.put(skey, tieCell);
		}
		return tieCell;
	}
public static TieCell getOrAddTieCellInMap(final Cell poiCell, HashMap<String, TieCell> tieCells) {
		String skey = CellUtility.getSkeyFromPoiCell(poiCell);
		TieCell tieCell = tieCells.get(skey);
		if (tieCell == null) {
			tieCell = new TieCell();
			tieCell.setSkey(skey);
			tieCells.put(skey, tieCell);
		}
		return tieCell;
	}
Gets the or add tie cell in map.

@param poiCell the poi cell
@param tieCells the tie cells
@return the or add tie cell in map