updated packages

vendor/symfony/contracts/Service/ServiceLocatorTrait.php

@@ -15,7 +15,7 @@ use Psr\Container\ContainerExceptionInterface;
 use Psr\Container\NotFoundExceptionInterface;
 
 /**
- * A trait to help implement PSR-11 service locators.
+ * A trait to help implement ServiceProviderInterface.
  *
  * @author Robin Chalas <robin.chalas@gmail.com>
  * @author Nicolas Grekas <p@tchwork.com>
@@ -23,7 +23,8 @@ use Psr\Container\NotFoundExceptionInterface;
 trait ServiceLocatorTrait
 {
     private $factories;
-    private $loading = array();
+    private $loading = [];
+    private $providedTypes;
 
     /**
      * @param callable[] $factories
@@ -66,6 +67,28 @@ trait ServiceLocatorTrait
         }
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function getProvidedServices(): array
+    {
+        if (null === $this->providedTypes) {
+            $this->providedTypes = [];
+
+            foreach ($this->factories as $name => $factory) {
+                if (!\is_callable($factory)) {
+                    $this->providedTypes[$name] = '?';
+                } else {
+                    $type = (new \ReflectionFunction($factory))->getReturnType();
+
+                    $this->providedTypes[$name] = $type ? ($type->allowsNull() ? '?' : '').$type->getName() : '?';
+                }
+            }
+        }
+
+        return $this->providedTypes;
+    }
+
     private function createNotFoundException(string $id): NotFoundExceptionInterface
     {
         if (!$alternatives = array_keys($this->factories)) {