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    <h3>Editing: TraceableValueResolver.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php

/*
 * 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\HttpKernel\Controller\ArgumentResolver;

use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpKernel\Controller\ArgumentValueResolverInterface;
use Symfony\Component\HttpKernel\ControllerMetadata\ArgumentMetadata;
use Symfony\Component\Stopwatch\Stopwatch;

/**
 * Provides timing information via the stopwatch.
 *
 * @author Iltar van der Berg &lt;kjarli@gmail.com&gt;
 */
final class TraceableValueResolver implements ArgumentValueResolverInterface
{
    private $inner;
    private $stopwatch;

    public function __construct(ArgumentValueResolverInterface $inner, Stopwatch $stopwatch)
    {
        $this-&gt;inner = $inner;
        $this-&gt;stopwatch = $stopwatch;
    }

    /**
     * {@inheritdoc}
     */
    public function supports(Request $request, ArgumentMetadata $argument): bool
    {
        $method = \get_class($this-&gt;inner).'::'.__FUNCTION__;
        $this-&gt;stopwatch-&gt;start($method, 'controller.argument_value_resolver');

        $return = $this-&gt;inner-&gt;supports($request, $argument);

        $this-&gt;stopwatch-&gt;stop($method);

        return $return;
    }

    /**
     * {@inheritdoc}
     */
    public function resolve(Request $request, ArgumentMetadata $argument): iterable
    {
        $method = \get_class($this-&gt;inner).'::'.__FUNCTION__;
        $this-&gt;stopwatch-&gt;start($method, 'controller.argument_value_resolver');

        yield from $this-&gt;inner-&gt;resolve($request, $argument);

        $this-&gt;stopwatch-&gt;stop($method);
    }
}
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