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diff --git a/vendor/symfony/dependency-injection/Argument/IteratorArgument.php b/vendor/symfony/dependency-injection/Argument/IteratorArgument.php
new file mode 100644
index 000000000..ab3a87900
--- /dev/null
+++ b/vendor/symfony/dependency-injection/Argument/IteratorArgument.php
@@ -0,0 +1,55 @@
+<?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\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * Represents a collection of values to lazily iterate over.
+ *
+ * @author Titouan Galopin <galopintitouan@gmail.com>
+ */
+class IteratorArgument implements ArgumentInterface
+{
+    private $values;
+
+    /**
+     * @param Reference[] $values
+     */
+    public function __construct(array $values)
+    {
+        $this->setValues($values);
+    }
+
+    /**
+     * @return array The values to lazily iterate over
+     */
+    public function getValues()
+    {
+        return $this->values;
+    }
+
+    /**
+     * @param Reference[] $values The service references to lazily iterate over
+     */
+    public function setValues(array $values)
+    {
+        foreach ($values as $k => $v) {
+            if (null !== $v && !$v instanceof Reference) {
+                throw new InvalidArgumentException(sprintf('An IteratorArgument must hold only Reference instances, "%s" given.', is_object($v) ? get_class($v) : gettype($v)));
+            }
+        }
+
+        $this->values = $values;
+    }
+}