public void setRoots(List<? extends FrameworkSupportNodeBase> roots) {
    CheckedTreeNode root = new CheckedTreeNode(null);
    for (FrameworkSupportNodeBase<?> base : roots) {
      root.add(base);
    }
    setModel(new DefaultTreeModel(root));
    TreeUtil.expandAll(this);
  }
public void setRoots(List<? extends FrameworkSupportNodeBase> roots)