feature #50842 Add missing return types to magic methods (wouterj)

This PR was merged into the 6.4 branch.

Discussion
----------

Add missing return types to magic methods

| Q             | A
| ------------- | ---
| Branch?       | 6.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | yes
| Tickets       | -
| License       | MIT
| Doc PR        | -

I promise, these 72 methods really are the last methods that did not have a return type already 🙃

Commits
-------

6b270010c4 Add missing return types to magic methods

Author: nicolas-grekas

Loader/Configurator/AbstractConfigurator.php

@@ -34,6 +34,9 @@ abstract class AbstractConfigurator
     /** @internal */
     protected Definition|Alias|null $definition = null;
 
+    /**
+     * @return mixed
+     */
     public function __call(string $method, array $args)
     {
         if (method_exists($this, 'set'.$method)) {
@@ -48,6 +51,9 @@ public function __sleep(): array
         throw new \BadMethodCallException('Cannot serialize '.__CLASS__);
     }
 
+    /**
+     * @return void
+     */
     public function __wakeup()
     {
         throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);

ServiceLocator.php

@@ -60,6 +60,9 @@ public function get(string $id): mixed
         }
     }
 
+    /**
+     * @return mixed
+     */
     public function __invoke(string $id)
     {
         return isset($this->factories[$id]) ? $this->get($id) : null;