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vendor/symfony/dependency-injection/Argument/ServiceLocator.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\DependencyInjection\Argument;
+
+use Symfony\Component\DependencyInjection\ServiceLocator as BaseServiceLocator;
+
+/**
+ * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @internal
+ */
+class ServiceLocator extends BaseServiceLocator
+{
+    public function __construct(
+        private \Closure $factory,
+        private array $serviceMap,
+        private ?array $serviceTypes = null,
+    ) {
+        parent::__construct($serviceMap);
+    }
+
+    public function get(string $id): mixed
+    {
+        return match (\count($this->serviceMap[$id] ?? [])) {
+            0 => parent::get($id),
+            1 => $this->serviceMap[$id][0],
+            default => ($this->factory)(...$this->serviceMap[$id]),
+        };
+    }
+
+    public function getProvidedServices(): array
+    {
+        return $this->serviceTypes ??= array_map(fn () => '?', $this->serviceMap);
+    }
+}