frameMap.clear();  if (log.isDebugEnabled()) log.debug("buildFrameTree frameHelper="+frameHelper);
    public void buildFrameTree(FrameHelper frameHelper) {	    this.frameHelper = frameHelper;        root = new DefaultMutableTreeNode("frameset '"+frameHelper.getFrameSetName()+"'");        //frameMap.clear();        Collection relationshipFrames = process(frameHelper.getAllFrames());        processRelationships(relationshipFrames);        Collection rootNodes = findRootLevelNodes();        for (Iterator ii=rootNodes.iterator(); ii.hasNext();) {            root.add((DefaultMutableTreeNode) ii.next());        }	    tree.setModel(new DefaultTreeModel(root));    }