public function createContentLangSoftDelete($n)
 {
     $callback = function ($item) use($n) {
         for ($i = 0; $i < $n; $i++) {
             $item->ContentLangs()->create(['__lang_id__' => $i, 'title' => str_random(5), 'content' => str_random(10)])->save();
         }
     };
     ContentSoftDelete::all()->each($callback);
     return ContentSoftDelete::find(1)->ContentLangs()->getResults()->count() === $n;
 }