public void mergeSubState(TreeRowKey rowKey, TreeState subState) {
Iterator<TreeRowKey> iter = subState.expandedNodes.iterator();
while (iter != null && iter.hasNext()) {
TreeRowKey key = iter.next().getSubKey(1);
if (key.depth() > 0) {
expandedNodes.add(new ListRowKey((ListRowKey)rowKey, (ListRowKey)key));
} else if (!expandedNodes.contains(rowKey)) {
expandedNodes.add(rowKey);
}
}