private KongaTree createTree() {
KongaTree tree = new KongaTree(model);
tree.setRootVisible(false);
tree.setShowsRootHandles(true);
tree.setCellRenderer(renderer);
KongaTreeNode current = model.getRoot().getChildAt(0);
tree.makeNodeExpanded(current);
tree.asSelectionSource().setNodeObjectConverter(new UserObjectNodeObjectConverter(File.class));
return tree;
}