/**
  * View display method
  * @return void
  */
 function display($tpl = null)
 {
     // Check for errors.
     if (count($errors = $this->get('Errors'))) {
         JError::raiseError(500, implode('<br />', $errors));
         return false;
     }
     // Assign data to the view
     $this->icons = $this->get('Icons');
     $this->contributors = DemoHelper::getContributors();
     // Set the toolbar
     $this->addToolBar();
     // Display the template
     parent::display($tpl);
     // Set the document
     $this->setDocument();
 }