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diff --git a/vendor/symfony/expression-language/Node/Node.php b/vendor/symfony/expression-language/Node/Node.php
new file mode 100644
index 000000000..da49d6b4b
--- /dev/null
+++ b/vendor/symfony/expression-language/Node/Node.php
@@ -0,0 +1,78 @@
+<?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\ExpressionLanguage\Node;
+
+use Symfony\Component\ExpressionLanguage\Compiler;
+
+/**
+ * Represents a node in the AST.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Node
+{
+    public $nodes = array();
+    public $attributes = array();
+
+    /**
+     * Constructor.
+     *
+     * @param array $nodes      An array of nodes
+     * @param array $attributes An array of attributes
+     */
+    public function __construct(array $nodes = array(), array $attributes = array())
+    {
+        $this->nodes = $nodes;
+        $this->attributes = $attributes;
+    }
+
+    public function __toString()
+    {
+        $attributes = array();
+        foreach ($this->attributes as $name => $value) {
+            $attributes[] = sprintf('%s: %s', $name, str_replace("\n", '', var_export($value, true)));
+        }
+
+        $repr = array(str_replace('Symfony\Component\ExpressionLanguage\Node\\', '', get_class($this)).'('.implode(', ', $attributes));
+
+        if (count($this->nodes)) {
+            foreach ($this->nodes as $node) {
+                foreach (explode("\n", (string) $node) as $line) {
+                    $repr[] = '    '.$line;
+                }
+            }
+
+            $repr[] = ')';
+        } else {
+            $repr[0] .= ')';
+        }
+
+        return implode("\n", $repr);
+    }
+
+    public function compile(Compiler $compiler)
+    {
+        foreach ($this->nodes as $node) {
+            $node->compile($compiler);
+        }
+    }
+
+    public function evaluate($functions, $values)
+    {
+        $results = array();
+        foreach ($this->nodes as $node) {
+            $results[] = $node->evaluate($functions, $values);
+        }
+
+        return $results;
+    }
+}