protected function getAttributeKeysAndControllers()
    {
        if ($this->attributeKeysAndControllers === null) {
            $list = [];
            foreach ($this->category->getList() as $attributeKey) {
                $list[] = [$attributeKey, $attributeKey->getController()];
            }
            $this->attributeKeysAndControllers = $list;
        }

        return $this->attributeKeysAndControllers;
    }