Issue #3419356 by taraskorpach, acbramley: Use constructor property promotion...

   */

  protected $checksumProvider;

  /**

   * The serializer to use.

   *

   * @var \Drupal\Component\Serialization\ObjectAwareSerializationInterface

   */

  protected ObjectAwareSerializationInterface $serializer;

  /**

   * Constructs a DatabaseBackend object.

   *

    Connection $connection,

    CacheTagsChecksumInterface $checksum_provider,

    $bin,

    ObjectAwareSerializationInterface|int|string|null $serializer = NULL,

    protected ObjectAwareSerializationInterface|int|string|null $serializer = NULL,

    $max_rows = NULL,

  ) {

    // All cache tables should be prefixed with 'cache_'.

    $this->bin = $bin;

    $this->connection = $connection;

    $this->checksumProvider = $checksum_provider;

    if (is_int($serializer) || is_string($serializer)) {

    if (is_int($this->serializer) || is_string($this->serializer)) {

      @trigger_error('Calling ' . __METHOD__ . ' with the $max_rows as 3rd argument is deprecated in drupal:10.3.0 and it will be the 4th argument in drupal:11.0.0. See https://www.drupal.org/node/3014684', E_USER_DEPRECATED);

      $max_rows = $serializer;

      $serializer = \Drupal::service('serialization.phpserialize');

      $max_rows = $this->serializer;

      $this->serializer = \Drupal::service('serialization.phpserialize');

    }

    elseif ($serializer === NULL) {

    elseif ($this->serializer === NULL) {

      @trigger_error('Calling ' . __METHOD__ . ' without the $serializer argument is deprecated in drupal:10.3.0 and it will be required in drupal:11.0.0. See https://www.drupal.org/node/3014684', E_USER_DEPRECATED);

      $serializer = \Drupal::service('serialization.phpserialize');

      $this->serializer = \Drupal::service('serialization.phpserialize');

    }

    $this->serializer = $serializer;

    $this->maxRows = $max_rows === NULL ? static::DEFAULT_MAX_ROWS : $max_rows;

  }