public function importConfigSimple($config) {
    // Stream wrappers are not available during installation.
    $tmp_dir = (defined('MAINTENANCE_MODE') ? '/tmp' : 'temporary:/') . '/confi_simple' . $this->uuid->generate();
    // Notify ConfigEventSubscriber that this is update from OpenY.
    global $_openy_config_import_event;
    $_openy_config_import_event = TRUE;
    if (!$this->fileSystem->mkdir($tmp_dir)) {
      throw new ConfigImporterException('Failed to create temporary directory: ' . $tmp_dir);
    }
    $tmp_storage = new FileStorage($tmp_dir);
    $file = "$this->directory/$config.yml";
    if ($this->upgradeLogManager->isManuallyChanged($config)) {
      // Skip config update and log this to logger entity.
      $this->logConfigImportError($file, $config);
      $_openy_config_import_event = FALSE;
      return;
    }
    if (file_exists($file)) {
      file_unmanaged_copy($file, $tmp_dir, FILE_EXISTS_REPLACE);
      // Check if exist logger entity and enabled force mode.
      if ($this->upgradeLogManager->isForceMode() && $this->upgradeLogManager->isManuallyChanged($config, FALSE)) {
        // ConfigStorage->write not trigger config save event, so create
        // backup here.
        $this->upgradeLogManager->createBackup($config);
      }
      $this->configStorage->write($config, $tmp_storage->read($config));
    }
    $_openy_config_import_event = FALSE;
  }