minor #35396 [DoctrineBridge] [DX] Improve condition for exception te…

…xt in ManagerRegistry to avoid confusion (guilliamxavier)

This PR was submitted for the 4.4 branch but it was merged into the 4.3 branch instead.

Discussion
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[DoctrineBridge] [DX] Improve condition for exception text in ManagerRegistry to avoid confusion

| Q             | A
| ------------- | ---
| Branch?       | 4.4
| Bug fix?      | yesish
| New feature?  | no
| Deprecations? | no
| Tickets       | Fix #31047 (comment)
| License       | MIT
| Doc PR        | -

(Targetting 4.4 because 4.3 is already almost EOM)

Commits
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0d47fdf [DoctrineBridge] [DX] Improve condition for exception text in ManagerRegistry to avoid confusion

src/Symfony/Bridge/Doctrine/ManagerRegistry.php

@@ -13,6 +13,7 @@
 
 use Doctrine\Persistence\AbstractManagerRegistry;
 use ProxyManager\Proxy\LazyLoadingInterface;
+use Symfony\Bridge\ProxyManager\LazyProxy\Instantiator\RuntimeInstantiator;
 use Symfony\Component\DependencyInjection\Container;
 
 /**
@@ -46,7 +47,7 @@ protected function resetService($name)
         $manager = $this->container->get($name);
 
         if (!$manager instanceof LazyLoadingInterface) {
-            throw new \LogicException('Resetting a non-lazy manager service is not supported. '.(interface_exists(LazyLoadingInterface::class) ? sprintf('Declare the "%s" service as lazy.', $name) : 'Try running "composer require symfony/proxy-manager-bridge".'));
+            throw new \LogicException('Resetting a non-lazy manager service is not supported. '.(interface_exists(LazyLoadingInterface::class) && class_exists(RuntimeInstantiator::class) ? sprintf('Declare the "%s" service as lazy.', $name) : 'Try running "composer require symfony/proxy-manager-bridge".'));
         }
         $manager->setProxyInitializer(\Closure::bind(
             function (&$wrappedInstance, LazyLoadingInterface $manager) use ($name) {