code: public ResourceBundle getResourceBundle(FacesContext ctx, String name) {
  
          if (defaultApplication != null) {
              return defaultApplication.getResourceBundle(ctx, name);
          }
          
          throw new UnsupportedOperationException();
  
      }
docs: <p>Find a <code>ResourceBundle</code> as defined in the
  application configuration resources under the specified name.  If
  a <code>ResourceBundle</code> was defined for the name, return an
  instance that uses the locale of the current {@link
  javax.faces.component.UIViewRoot}.</p>
  
  <p>The default implementation throws
  <code>UnsupportedOperationException</code> and is provided
  for the sole purpose of not breaking existing applications that extend
  this class.</p>
  
  @throws FacesException if a bundle was defined, but not resolvable
  
  @throws NullPointerException if ctx == null || name == null
  
  @since 1.2