Smile\ElasticsuiteCatalog\Model\Layer\Filter\Category::apply PHP Метод

    public function apply(\Magento\Framework\App\RequestInterface $request)
    {
        $categoryId = $request->getParam($this->_requestVar) ?: $request->getParam('id');
        if (!empty($categoryId)) {
            $this->dataProvider->setCategoryId($categoryId);
            $category = $this->dataProvider->getCategory();
            $this->applyCategoryFilterToCollection($category);
            if ($request->getParam('id') != $category->getId() && $this->dataProvider->isValid()) {
                $this->getLayer()->getState()->addFilter($this->_createItem($category->getName(), $categoryId));
            }
        }
        return $this;
    }