addLocation example

      if (!isset($this->translations[$name][$langcode][$context][$source])) {
        // There is no translation of the source string in this config location         // to this language for this context.         if ($translation = $this->localeStorage->findTranslation(['source' => $source, 'context' => $context, 'language' => $langcode])) {
          // Look for a translation of the string. It might have one, but not           // be saved in this configuration location yet.           // If the string has a translation for this context to this language,           // save it in the configuration location so it can be looked up faster           // next time.           $this->localeStorage->createString((array) $translation)
            ->addLocation('configuration', $name)
            ->save();
        }
        else {
          // No translation was found. Add the source to the configuration           // location so it can be translated, and the string is faster to look           // for next time.           $translation = $this->localeStorage
            ->createString(['source' => $source, 'context' => $context])
            ->addLocation('configuration', $name)
            ->save();
        }

        

$this->assertCount(3, $search);

    $source->delete();
    $string = $this->storage->findString(['lid' => $lid]);
    $this->assertNull($string);
    $deleted = $search = $this->storage->getTranslations(['lid' => $lid]);
    $this->assertEmpty($deleted);

    // Tests that locations of different types and arbitrary lengths can be     // added to a source string. Too long locations will be cut off.     $source_string = $this->buildSourceString();
    $source_string->addLocation('javascript', $this->randomString(8));
    $source_string->addLocation('configuration', $this->randomString(50));
    $source_string->addLocation('code', $this->randomString(100));
    $source_string->addLocation('path', $location = $this->randomString(300));
    $source_string->save();

    $rows = $this->container->get('database')->select('locales_location')
      ->fields('locales_location')
      ->condition('sid', $source_string->lid)
      ->execute()
      ->fetchAllAssoc('type');
    $this->assertCount(4, $rows);
    

if ($translation) {
      $value = !empty($translation->translation) ? $translation->translation : TRUE;
    }
    else {
      // We don't have the source string, update the {locales_source} table to       // indicate the string is not translated.       $this->stringStorage->createString([
        'source' => $offset,
        'context' => $this->context,
        'version' => \Drupal::VERSION,
      ])->addLocation('path', $this->requestStack->getCurrentRequest()->getRequestUri())->save();
      $value = TRUE;
    }

    // If there is no translation available for the current language then use     // language fallback to try other translations.     if ($value === TRUE) {
      $fallbacks = $this->languageManager->getFallbackCandidates(['langcode' => $this->langcode, 'operation' => 'locale_lookup', 'data' => $offset]);
      if (!empty($fallbacks)) {
        foreach ($fallbacks as $langcode) {
          $translation = $this->stringStorage->findTranslation([
            'language' => $langcode,