// expand state
String expandState = (String) requestParameterMap.get(treeId);
String searchString = ";" + nodeId + ";";
if (StringUtils.contains(expandState, searchString)) {
state.addExpandState((DefaultMutableTreeNode) node.getValue());
}
if (TreeOldRenderer.isSelectable(tree)) { // selection
String selected = (String) requestParameterMap.get(treeId + UITreeOld.SELECT_STATE);