public function whenPostWritten(PostWritten $event)
{
$post = new PostList($event->postId(), new MemberId('6703202d-6556-404d-988c-b76c5a34b97c'), $event->title(), $event->content(), $event->type(), new DateTimeImmutable('2016-09-02T10:14:05'));
$this->posts->save($post);
}
