how I invalidated keycdn

keycdn.php

<?php


    // Invalidate and update the item state.
    $hashes = KeycdnCacheTagHeaderGenerator::cacheTagsToHashes($tags);
    // Break the list of tags into multiple requests.
    $hash_sets = array_chunk($hashes, 1000);
    foreach ($hash_sets as $hash_set) {
      $invalidation_state = $this->invalidateItems('tags', $hash_set);
    }

// ...
  
  
  /**
   * Invalidate Key CDN cache.
   *
   * @param mixed $type
   *   Type to purge like tags/url. If null, will purge everything.
   * @param string[] $invalidates
   *   A list of items to invalidate.
   *
   * @return int
   *    Returns invalidate items.
   */
  protected function invalidateItems($type = NULL, array $invalidates = []) {
    // Get zone info.
    $zone = $this->settings->get('zone');
    $uri = $this->getPurgeUri($type) . "/{$zone}.json";

    // This will contain the info that need to be cleared. For the case of
    // 'everything', this will be empty and thus nothing.
    $params = [];

    // If url/tag.
    if ($type) {
      $params['json'] = [$type => $invalidates];
    }

    try {
      // Purge everything for the given zone.
      /** @var \Psr\Http\Message\ResponseInterface $response */
      $response = $this->httpClient->request('DELETE', $uri, [
        'auth' => [$this->settings->get('api_key'), ''],
        'headers' => ['Content-Type' => 'application/json'],
        'connect_timeout' => 2,
      ] + $params);

      // If successfully clears cache.
      if ($response->getStatusCode() == 200) {
        return InvalidationInterface::SUCCEEDED;
      }

      return InvalidationInterface::FAILED;
    }
    catch (\Exception $e) {
      // If something bad happens.
      return InvalidationInterface::FAILED;
    }
  }