title: Modify image of primefaces rowToggler
body: <p>I need to modify the image of primefaces rowToggler. This is what I'm trying in the css file: </p>
  
  <pre><code>.ui-datatable .ui-row-toggler {
     cursor: pointer;
     background-image: url("/resources/images/expand.jpg") ; 
  }
  </code></pre>
  
  <p>I have also tried changing the url to /images/expand.jpg, images/expand.jpg and simply expand.jpg. But none of them find the image. </p>
  
  <p>What am I missing? </p>