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    <h3>Editing: ImmutableEventDispatcher.php</h3>
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/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier &lt;fabien@symfony.com&gt;
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\EventDispatcher;

/**
 * A read-only proxy for an event dispatcher.
 *
 * @author Bernhard Schussek &lt;bschussek@gmail.com&gt;
 */
class ImmutableEventDispatcher implements EventDispatcherInterface
{
    private EventDispatcherInterface $dispatcher;

    public function __construct(EventDispatcherInterface $dispatcher)
    {
        $this-&gt;dispatcher = $dispatcher;
    }

    public function dispatch(object $event, string $eventName = null): object
    {
        return $this-&gt;dispatcher-&gt;dispatch($event, $eventName);
    }

    public function addListener(string $eventName, callable|array $listener, int $priority = 0)
    {
        throw new \BadMethodCallException('Unmodifiable event dispatchers must not be modified.');
    }

    public function addSubscriber(EventSubscriberInterface $subscriber)
    {
        throw new \BadMethodCallException('Unmodifiable event dispatchers must not be modified.');
    }

    public function removeListener(string $eventName, callable|array $listener)
    {
        throw new \BadMethodCallException('Unmodifiable event dispatchers must not be modified.');
    }

    public function removeSubscriber(EventSubscriberInterface $subscriber)
    {
        throw new \BadMethodCallException('Unmodifiable event dispatchers must not be modified.');
    }

    public function getListeners(string $eventName = null): array
    {
        return $this-&gt;dispatcher-&gt;getListeners($eventName);
    }

    public function getListenerPriority(string $eventName, callable|array $listener): ?int
    {
        return $this-&gt;dispatcher-&gt;getListenerPriority($eventName, $listener);
    }

    public function hasListeners(string $eventName = null): bool
    {
        return $this-&gt;dispatcher-&gt;hasListeners($eventName);
    }
}
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