getArticleSimilar example

if ($product === null) {
            throw new NotFoundException(sprintf('Product by id "%d" not found', $id));
        }

        if ($this->getResultMode() === self::HYDRATE_ARRAY) {
            $product['images'] = $this->getArticleImages($id);
            $product['configuratorSet'] = $this->getArticleConfiguratorSet($id);
            $product['links'] = $this->getArticleLinks($id);
            $product['downloads'] = $this->getArticleDownloads($id);
            $product['categories'] = $this->getArticleCategories($id);
            $product['similar'] = $this->getArticleSimilar($id);
            $product['related'] = $this->getArticleRelated($id);
            $product['details'] = $this->getArticleVariants($id);
            $product['seoCategories'] = $this->getArticleSeoCategories($id);

            if (isset($options['considerTaxInput']) && $options['considerTaxInput']) {
                $product['mainDetail']['prices'] = $this->getTaxPrices(
                    $product['mainDetail']['prices'],
                    $product['tax']['tax']
                );

                foreach ($product['details'] as &$detail) {