https://github.com/liip/LiipImagineBundle/pull/278/files#r8191764

@makasim There is no interface yet, you should introduce it with this patch: `Liip\ImagineBundle\Imagine\Cache\Resolver\RequestAwareInterface` with a `setRequest` method only, just like https://github.com/symfony/symfony/blob/master/src/Symfony/Component/DependencyInjection/ContainerAwareInterface.php.