I want to package up a widget to be easily included in an arbitrary project. I don't want to require that the user link to my personally-created style sheet in their host page - I just want the css to be magically injected when they use my code.

I understand that CssResource can go some ways towards this dream, but after scouring documentation I haven't found any reference to natural type selectors. For instance, I want to style the `<tr>`s in my widget without having to add a class name to each one.

Is this achievable with GWT? GWT's own widgets all come pretty thoroughly styled, but it seems they've added a style class to every single element in the DOM!