public function getComments($postId = false)
    {
        $cArgs = [
            'author__in' => $this->ID,
            'orderby' => 'comment_date_gmt'
        ];
        if ($postId) {
            $cArgs['post_id'] = $postId;
        }
        $comments = [];
        foreach (get_comments($cArgs) as $c) {
            $comments[] = Comment::find($c->comment_ID);
        }
        return $comments;
    }