Flarum\Api\Serializer\DiscussionBasicSerializer::startUser PHP Method

protected startUser ( $discussion ) : Relationship
return	Tobscure\JsonApi\Relationship

    protected function startUser($discussion)
    {
        return $this->hasOne($discussion, 'Flarum\\Api\\Serializer\\UserBasicSerializer');
    }

DiscussionBasicSerializer