protected XValueContainerNode doCreateNewRootNode(@Nullable XStackFrame stackFrame) {
    XValueContainerNode root;
    if (stackFrame == null) {
      // do not set leaf=false here, otherwise info messages do not appear, see IDEA-200865
      root = new XValueContainerNode<XValueContainer>(getTree(), null, false, new XValueContainer() {}) {};
    }
    else {
      root = new XStackFrameNode(getTree(), stackFrame);
    }
    return root;
  }
protected XValueContainerNode doCreateNewRootNode(@Nullable XStackFrame stackFrame)