public function arretsToHide($newsletter_id = null)
    {
        $campagnes = $this->campagne->getAll($newsletter_id)->where('status','brouillon');

        return $campagnes->flatMap(function ($campagne) {
                return $campagne->content;
            })->map(function ($content, $key) {

                if($content->arret_id)
                    return $content->arret_id ;

                if($content->groupe_id > 0)
                    return $content->groupe->arrets->pluck('id')->all();
            
            })->filter(function ($value, $key) {
                return !empty($value);
            })->flatten()->toArray();
    }