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diff --git a/vendor/symfony/validator/Mapping/Loader/StaticMethodLoader.php b/vendor/symfony/validator/Mapping/Loader/StaticMethodLoader.php
new file mode 100644
index 000000000..4ff22573a
--- /dev/null
+++ b/vendor/symfony/validator/Mapping/Loader/StaticMethodLoader.php
@@ -0,0 +1,71 @@
+<?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\Validator\Mapping\Loader;
+
+use Symfony\Component\Validator\Exception\MappingException;
+use Symfony\Component\Validator\Mapping\ClassMetadata;
+
+/**
+ * Loads validation metadata by calling a static method on the loaded class.
+ *
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ */
+class StaticMethodLoader implements LoaderInterface
+{
+    /**
+     * The name of the method to call.
+     *
+     * @var string
+     */
+    protected $methodName;
+
+    /**
+     * Creates a new loader.
+     *
+     * @param string $methodName The name of the static method to call
+     */
+    public function __construct($methodName = 'loadValidatorMetadata')
+    {
+        $this->methodName = $methodName;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function loadClassMetadata(ClassMetadata $metadata)
+    {
+        /** @var \ReflectionClass $reflClass */
+        $reflClass = $metadata->getReflectionClass();
+
+        if (!$reflClass->isInterface() && $reflClass->hasMethod($this->methodName)) {
+            $reflMethod = $reflClass->getMethod($this->methodName);
+
+            if ($reflMethod->isAbstract()) {
+                return false;
+            }
+
+            if (!$reflMethod->isStatic()) {
+                throw new MappingException(sprintf('The method %s::%s should be static', $reflClass->name, $this->methodName));
+            }
+
+            if ($reflMethod->getDeclaringClass()->name != $reflClass->name) {
+                return false;
+            }
+
+            $reflMethod->invoke(null, $metadata);
+
+            return true;
+        }
+
+        return false;
+    }
+}