RequestStack.php

<?php

namespace Drupal\Core\Http;

use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\RequestStack as SymfonyRequestStack;

/**
 * Forward-compatibility shim for Symfony's RequestStack.
 *
 * @todo https://www.drupal.org/node/3265121 Remove in Drupal 10.0.x.
 */
class RequestStack extends SymfonyRequestStack {
    
    /**
     * Gets the main request.
     *
     * @return \Symfony\Component\HttpFoundation\Request|null
     *   The main request.
     */
    public function getMainRequest() : ?Request {
        if (method_exists(SymfonyRequestStack::class, 'getMainRequest')) {
            return parent::getMainRequest();
        }
        else {
            return parent::getMasterRequest();
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function getMasterRequest() {
        @trigger_error(__METHOD__ . '() is deprecated in drupal:9.3.0 and is removed from drupal:10.0.0. Use getMainRequest() instead. See https://www.drupal.org/node/3253744', E_USER_DEPRECATED);
        return $this->getMainRequest();
    }

}