title: Set background image without css
body: <p>I'm looking for a solution to set up background image without CSS knowledge and addition of css files. At this point, I rely on mighty powers of Vaadin. Obviously, the solution posted <a href="https://stackoverflow.com/questions/36352430/vaadin-valo-background-image">here</a> is not appropriate for me, since I use a built-in ValoTheme and I highly want to follow my principles (use only one styling).</p>
  
  <p>Is it possible to do that without CSS?</p>