public Boolean adviseNodeOpened(UITree tree) {
                
                   if (!PostbackPhaseListener.isPostback()) {
                        Object key = tree.getRowKey();
                        TreeRowKey treeRowKey = (TreeRowKey) key;
                       
                       
                        if (treeRowKey == null) {
                           
                           
                            tree.queueCollapseAll();
                           
                            return Boolean.FALSE;
                       
                       
                    }
                    }   
                      
                    return null;
               
        }

with this function i collapse the tree.

Problem: when it collapses and i click back on the root node, it expands everythign expanded pre-collapse phase.I want to collapse every node, and not just the first level nodes. How can this be done? thank you.