function __construct()
 {
     parent::__construct();
     require_once 'polyfills/Button.php';
     require_once 'polyfills/LinkButton.php';
     PageLayout::addStylesheet($this->getPluginURL() . '/polyfills/buttons.css');
     $navigation = new AutoNavigation(_('Plugin-Generator'));
     $navigation->setURL(PluginEngine::GetLink($this, array(), ''));
     $navigation->setImage(Assets::image_path('icons/16/black/plugin.png'));
     Navigation::addItem('/tools/plugingenerator', $navigation);
     /*/
             $navigation = new AutoNavigation(_('Plugin-Generator'));
             $navigation->setURL(PluginEngine::GetLink($this, array(), ''));
             Navigation::addItem('/plugingenerator/index', $navigation);
     
             $navigation = new AutoNavigation(_('Tools'));
             $navigation->setURL(PluginEngine::GetLink($this, array(), 'tools'));
             Navigation::addItem('/plugingenerator/tools', $navigation);
     //*/
 }