XValueContainerNode (@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; }