src/Transport/Adapter/AdapterOptions.php

<?php
/**
 * Elasticsearch PHP Client
 *
 * @link      https://github.com/elastic/elasticsearch-php
 * @copyright Copyright (c) Elasticsearch B.V (https://www.elastic.co)
 * @license   https://opensource.org/licenses/MIT MIT License
 *
 * Licensed to Elasticsearch B.V under one or more agreements.
 * Elasticsearch B.V licenses this file to you under the MIT License.
 * See the LICENSE file in the project root for more information.
 */
declare(strict_types = 1);

namespace Elastic\Elasticsearch\Transport\Adapter;

/**
 * The HTTP client adapters supported
 */
final class AdapterOptions
{
    const HTTP_ADAPTERS = [
        "GuzzleHttp\\Client" => "Elastic\\Elasticsearch\\Transport\\Adapter\\Guzzle",
        "Symfony\\Component\\HttpClient\\HttplugClient" => "Elastic\\Elasticsearch\\Transport\\Adapter\\Symfony",
        "Symfony\\Component\\HttpClient\\Psr18Client" => "Elastic\\Elasticsearch\\Transport\\Adapter\\Symfony",
        "Elastic\\Transport\\Client\\Curl" => "Elastic\\Elasticsearch\\Transport\\Adapter\\ElasticCurl"
    ];
}