Should the bundle include a template for flash messages?

[Ingannatore]

In every CRUD backend I've made, there is the need to show flash messages to the user; I also find myself to regularly use (Twitter Bootstrap)[http://getbootstrap.com/] as a quick way to give those backends some sort of graphic appeal.

So the question is pretty simple: should our bundle include a template (or even a custom Twig function) to render those flash messages in a Bootstrap-like look?