App\Transformers\BeatmapPlaycountTransformer::includeBeatmapset PHP Method

    public function includeBeatmapset(BeatmapPlaycount $playcount)
    {
        if ($playcount->beatmap === null) {
            return;
        }
        return $this->item($playcount->beatmap->beatmapset, new BeatmapsetTransformer());
    }