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diff --git a/vendor/symfony/yaml/Yaml.php b/vendor/symfony/yaml/Yaml.php
new file mode 100644
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+++ b/vendor/symfony/yaml/Yaml.php
@@ -0,0 +1,100 @@
+<?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\Yaml;
+
+use Symfony\Component\Yaml\Exception\ParseException;
+
+/**
+ * Yaml offers convenience methods to load and dump YAML.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Yaml
+{
+    /**
+     * Parses YAML into a PHP value.
+     *
+     *  Usage:
+     *  <code>
+     *   $array = Yaml::parse(file_get_contents('config.yml'));
+     *   print_r($array);
+     *  </code>
+     *
+     * As this method accepts both plain strings and file names as an input,
+     * you must validate the input before calling this method. Passing a file
+     * as an input is a deprecated feature and will be removed in 3.0.
+     *
+     * Note: the ability to pass file names to the Yaml::parse method is deprecated since version 2.2 and will be removed in 3.0. Pass the YAML contents of the file instead.
+     *
+     * @param string $input                  Path to a YAML file or a string containing YAML
+     * @param bool   $exceptionOnInvalidType True if an exception must be thrown on invalid types false otherwise
+     * @param bool   $objectSupport          True if object support is enabled, false otherwise
+     * @param bool   $objectForMap           True if maps should return a stdClass instead of array()
+     *
+     * @return mixed The YAML converted to a PHP value
+     *
+     * @throws ParseException If the YAML is not valid
+     */
+    public static function parse($input, $exceptionOnInvalidType = false, $objectSupport = false, $objectForMap = false)
+    {
+        // if input is a file, process it
+        $file = '';
+        if (strpos($input, "\n") === false && is_file($input)) {
+            @trigger_error('The ability to pass file names to the '.__METHOD__.' method is deprecated since version 2.2 and will be removed in 3.0. Pass the YAML contents of the file instead.', E_USER_DEPRECATED);
+
+            if (false === is_readable($input)) {
+                throw new ParseException(sprintf('Unable to parse "%s" as the file is not readable.', $input));
+            }
+
+            $file = $input;
+            $input = file_get_contents($file);
+        }
+
+        $yaml = new Parser();
+
+        try {
+            return $yaml->parse($input, $exceptionOnInvalidType, $objectSupport, $objectForMap);
+        } catch (ParseException $e) {
+            if ($file) {
+                $e->setParsedFile($file);
+            }
+
+            throw $e;
+        }
+    }
+
+    /**
+     * Dumps a PHP value to a YAML string.
+     *
+     * The dump method, when supplied with an array, will do its best
+     * to convert the array into friendly YAML.
+     *
+     * @param mixed $input                  The PHP value
+     * @param int   $inline                 The level where you switch to inline YAML
+     * @param int   $indent                 The amount of spaces to use for indentation of nested nodes
+     * @param bool  $exceptionOnInvalidType true if an exception must be thrown on invalid types (a PHP resource or object), false otherwise
+     * @param bool  $objectSupport          true if object support is enabled, false otherwise
+     *
+     * @return string A YAML string representing the original PHP value
+     */
+    public static function dump($input, $inline = 2, $indent = 4, $exceptionOnInvalidType = false, $objectSupport = false)
+    {
+        if ($indent < 1) {
+            throw new \InvalidArgumentException('The indentation must be greater than zero.');
+        }
+
+        $yaml = new Dumper();
+        $yaml->setIndentation($indent);
+
+        return $yaml->dump($input, $inline, 0, $exceptionOnInvalidType, $objectSupport);
+    }
+}