public void addResultNode(@Nullable XStackFrame stackFrame, @NotNull XExpression expression) {
    WatchNodeImpl message = new ResultNode(myTree, this, expression, stackFrame);
    if (ContainerUtil.getFirstItem(myChildren) instanceof ResultNode) {
      myChildren.set(0, message);
      message.fireNodeStructureChanged();
    }
    else {
      myChildren.add(0, message);
      fireNodeInserted(0);
    }
    TreeUtil.selectNode(myTree, message);
  }
public void addResultNode(@Nullable XStackFrame stackFrame, @NotNull XExpression expression)