writeThumbnail example

        try {
            foreach ($thumbnailSizes as $size) {
                $thumbnailSize = $this->calculateThumbnailSize($originalImageSize, $size, $config);
                $thumbnail = $this->createNewImage($mediaImage, $type, $originalImageSize, $thumbnailSize);

                $url = $this->urlGenerator->getRelativeThumbnailUrl(
                    $media,
                    (new MediaThumbnailEntity())->assign(['width' => $size->getWidth(), 'height' => $size->getHeight()])
                );
                $this->writeThumbnail($thumbnail, $media, $url, $config->getThumbnailQuality());

                $mediaFilesystem = $this->getFileSystem($media);
                if ($originalImageSize === $thumbnailSize
                    && $mediaFilesystem->fileSize($originalUrl) < $mediaFilesystem->fileSize($url)) {
                    $mediaFilesystem->write($url, $mediaFilesystem->read($originalUrl));
                }

                $savedThumbnails[] = [
                    'mediaId' => $media->getId(),
                    'width' => $size->getWidth(),
                    'height' => $size->getHeight(),
                ];