public function getHighestGroupPage()
    {
        $max = 1;
        $path = $this->prefixWithNamespace('groupPage');
        $groupPages = $this->argumentsAccessor->get($path, []);
        foreach ($groupPages as $groups) {
            if (!is_array($groups)) continue;
            foreach ($groups as $groupItemPage) {
                if ($groupItemPage > $max) {
                    $max = $groupItemPage;
                }
            }
        }

        return $max;
    }