See: symfony/symfony#26655

I'm not sure where or how the above new functionality should be documented. https://symfony.com/doc/current/reference/configuration/web_profiler.html seems like the closest thing I could found but it doesn't quite fit. Suggestions?

The basic functionality is that a developer can add a Symfony-Debug-Toolbar-Replace with a value of "1" to an ajax response and the debug toolbar will automatically reload showing the info from the ajax request.