Layouts with constraint classes

[Richard Bair]

> This whole thread is a great example where a clean underlying Java API with
> good separation of concerns between domains (in this case FXML and Java
> API) with appropriate glue in between can allow for the most flexibility
> and future variations and extensions.
> 
> If only this same philosophy had been taken with CSS...

You mean not being able to style the UI controls except from CSS?