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vendor/symfony/config/Definition/Builder/NormalizationBuilder.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\Config\Definition\Builder;
+
+/**
+ * This class builds normalization conditions.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class NormalizationBuilder
+{
+    protected $node;
+    public $before = [];
+    public $remappings = [];
+
+    public function __construct(NodeDefinition $node)
+    {
+        $this->node = $node;
+    }
+
+    /**
+     * Registers a key to remap to its plural form.
+     *
+     * @param string      $key    The key to remap
+     * @param string|null $plural The plural of the key in case of irregular plural
+     *
+     * @return $this
+     */
+    public function remap(string $key, string $plural = null)
+    {
+        $this->remappings[] = [$key, null === $plural ? $key.'s' : $plural];
+
+        return $this;
+    }
+
+    /**
+     * Registers a closure to run before the normalization or an expression builder to build it if null is provided.
+     *
+     * @return ExprBuilder|$this
+     */
+    public function before(\Closure $closure = null)
+    {
+        if (null !== $closure) {
+            $this->before[] = $closure;
+
+            return $this;
+        }
+
+        return $this->before[] = new ExprBuilder($this->node);
+    }
+}