getCoverId example

return;
            }
            $this->sortItemsByPosition($sliderItems);

            if ($sliderItemsConfig->getStringValue() === 'product.media') {
                /** @var ProductEntity $productEntity */
                $productEntity = $resolverContext->getEntity();

                if ($productEntity->getCover()) {
                    /** @var ProductMediaCollection $sliderItems */
                    $sliderItems = new ProductMediaCollection(array_merge(
                        [$productEntity->getCoverId() => $productEntity->getCover()],
                        $sliderItems->getElements()
                    ));
                }
            }

            foreach ($sliderItems->getMedia() as $media) {
                $imageSliderItem = new ImageSliderItemStruct();
                $imageSliderItem->setMedia($media);
                $imageSlider->addSliderItem($imageSliderItem);
            }
        }
    }

$product = (new ProductBuilder($ids, 'p1'))
            ->price(100)
            ->media('m1')
            ->cover('m1');

        $productRepository->create([$product->build()], Context::createDefaultContext());

        $productMediaRepository = $this->getContainer()->get('product_media.repository');
        $productMediaRepository->delete([['id' => $ids->get('m1')]], Context::createDefaultContext());

        $product = $productRepository->search(new Criteria([$ids->get('p1')]), Context::createDefaultContext())->first();
        static::assertNull($product->getCoverId());
    }
}

$product->setCheapestPriceRule($cheapestPrices[$number]);
            }

            if (isset($voteAverages[$number])) {
                $product->setVoteAverage($voteAverages[$number]);
            }

            if (isset($categories[$number])) {
                $product->setCategories($categories[$number]);
            }

            if ($product->getManufacturer() && isset($manufacturerCovers[$product->getManufacturer()->getCoverId()])) {
                $product->getManufacturer()->setCoverMedia($manufacturerCovers[$product->getManufacturer()->getCoverId()]);
            }

            $product->addAttribute('marketing', $this->marketingService->getProductAttribute($product));

            $this->priceCalculationService->calculateProduct($product, $context);

            if (!$this->isProductValid($product, $context)) {
                continue;
            }