events::call PHP Method

    public static function call($name = '')
    {
        $page = Registry::get('page');
        if (empty($name)) {
            $name = 'main';
        }
        if ($func = isset(static::$stack[$page->slug][$name]) ? static::$stack[$page->slug][$name] : false) {
            return is_callable($func) ? $func() : '';
        }
        return '';
    }