public function missingKey($namespace, $group, $key)
 {
     if (!in_array($group, $this->config['exclude_groups'])) {
         $locales = Locale::all();
         foreach ($locales as $locale) {
             Translation::firstOrCreate(array('locale_id' => $locale->id, 'group_id' => $group, 'key' => $key));
         }
     }
 }