RainLab\Pages\Classes\Page::clearMenuCache PHP Method

    public static function clearMenuCache($theme)
    {
        Cache::forget(self::getMenuCacheKey($theme));
    }

 public static function clearCache()
 {
     $theme = Theme::getEditTheme();
     $router = new Router($theme);
     $router->clearCache();
     StaticPage::clearMenuCache($theme);
     SnippetManager::clearCache($theme);
 }