This table could be rendered using the [WebProfilerBundle template](https://github.com/symfony/symfony/blob/master/src/Symfony/Bundle/WebProfilerBundle/Resources/views/Profiler/table.html.twig):

```jinja
{% include 'WebProfilerBundle:Profiler:table.html.twig' with { 'data': message.headers } only %}
```

But it would not be compatible with Symfony 2.0