collectFromFiles() public method

e.g. ['users' => ['city', 'name', 'phone']]
public collectFromFiles ( ) : array
return array
 /**
  * Synchronize keys found in project files but missing in languages.
  *
  * @param $translationFiles
  * @throws \Illuminate\Contracts\Filesystem\FileNotFoundException
  * @return void
  */
 private function syncKeysFromFiles($translationFiles)
 {
     $this->info('Reading translation keys from files...');
     // An array of all translation keys as found in project files.
     $allKeysInFiles = $this->manager->collectFromFiles();
     foreach ($translationFiles as $fileName => $languages) {
         foreach ($languages as $languageKey => $path) {
             $fileContent = $this->manager->getFileContent($path);
             if (isset($allKeysInFiles[$fileName])) {
                 $missingKeys = array_diff($allKeysInFiles[$fileName], array_keys(array_dot($fileContent)));
                 foreach ($missingKeys as $i => $missingKey) {
                     if (Arr::has($fileContent, $missingKey)) {
                         unset($missingKeys[$i]);
                     }
                 }
                 $this->fillMissingKeys($fileName, $missingKeys, $languageKey);
             }
         }
     }
 }