private function appendListColumnsFromEvents(string $postType)
    {
        Event::listen(
            'post:table_list_rows', function ($results) use ($postType) {
                $rows = [];

                $inTableColumns = $this->getInTableColumns($postType);

                foreach($results as $key => $item){
                    // title
                    if(array_key_exists('title', $inTableColumns)) {
                        $rows[$key]['title'] = $item->title;
                    }

                    // created at
                    if(array_key_exists('created_at', $inTableColumns)) {
                        $rows[$key]['created_at'] = $item->created_at;
                    }

                }

                return $rows;
            }
        );

        return $this;
    }