treeState = createLayoutCache();
configureLayoutCache(); treeState.setRootVisible(tree.isRootVisible());
  protected void completeUIInstall()  {    setShowsRootHandles(tree.getShowsRootHandles());    updateRenderer();    updateDepthOffset();    setSelectionModel(tree.getSelectionModel());    treeState = createLayoutCache();    treeSelectionModel.setRowMapper(treeState);    configureLayoutCache();    updateSize();  }