function GantryMenu($params)
 {
     if (empty($params)) {
         $params = new GantryRegistry();
     }
     $params->def('menutype', 'mainmenu');
     $params->def('class_sfx', '');
     $params->def('menu_images', 0);
     // Added in 1.5
     $params->def('startLevel', 0);
     $params->def('endLevel', 0);
     $params->def('showAllChildren', 0);
     $this->_menudata = GantryMenu::_getMenuData($params);
 }