List<Cell> cellList = rack.getCellList();
DefaultMutableTreeTableNode aRoot = new DefaultMutableTreeTableNode(new Sample());
for (Iterator<Cell> iterator = cellList.iterator(); iterator.hasNext();) {
Cell cell = iterator.next();
cell.addObserver(this);
if (!cell.hasChildren()) {
aRoot.add(new DefaultMutableTreeTableNode(cell));
}
else {
DefaultMutableTreeTableNode currentNode = new DefaultMutableTreeTableNode(cell);