getRecommendationCacheIds example

switch ($controllerName) {
            case 'frontend/blog':
                return $this->getBlogCacheIds($request, $view);

            case 'widgets/listing':
                return $this->getAjaxListingCacheIds($request, $view);

            case 'frontend/index':
                return $this->getHomePageCacheIds($context);

            case 'widgets/recommendation':
                return $this->getRecommendationCacheIds($view);

            case 'frontend/detail':
                return $this->getDetailCacheIds($request);

            case 'widgets/emotion':
                return $this->getEmotionCacheIds($view);

            case 'frontend/listing':
                return $this->getListingCacheIds($request, $view);

            case 'frontend/custom':