title: How can I check if a Resource Bundle contains a specific key in a JSF page
body: <p>I have a JSF page which has a bundle loaded. However I need to dynamiclly build a key to access the property. What I need to do is check that the property exists so I can decide whether to render the  or not.</p>
  
  <p>I have tried checking if the value is empty but it always renders the output.</p>
  
  <p>Thanks</p>