Implementing decorators in middlewares to work with immutable Requests

MyMiddleware.php

<?php 
namespace Acme;

use Symfony\Component\HttpKernel\HTTPKernelInterface;
use Psr\Http\Message\Request;

class MyMiddleware implements HTTPKernelInterface {
  
  private $kernel;
  public function __construct(HTTPKernelInterface $kernel)
  {
    $this->kernel = $kernel;
  }
  
  public function handle(Request $request, $type = self::MASTER_REQUEST, $catch = true)
  {
    return $this->kernel->handle(
      new MyRequestDecorator($request),
      $type,
      $catch
    )
  }
}

MyRequestDecorator.php

<?php
namespace Acme;

use Psr\Http\Message\Request;

class MyRequestDecorator implements Request {
  private $request;
  
  public function __construct(Request $request)
  {
    $this->request = $request;
  }
  
  public function getQueryParams()
  {
    return ['foo' => 'bar'];
  }
  
  // Act as a proxy for all other methods...
}