Transaction.php

1. 9.x drupal/core/lib/Drupal/Core/Database/Transaction.php
2. 9.x drupal/core/lib/Drupal/Core/Database/Driver/mysql/Transaction.php
3. 9.x drupal/core/lib/Drupal/Core/Database/Driver/sqlite/Transaction.php
4. 9.x drupal/core/lib/Drupal/Core/Database/Driver/pgsql/Transaction.php

<?php

/**
 * @file
 * Definition of Drupal\Core\Database\Driver\pgsql\Transaction
 */
namespace Drupal\Core\Database\Driver\pgsql;

use Drupal\Core\Database\Transaction as DatabaseTransaction;
class Transaction extends DatabaseTransaction {

}