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diff --git a/web/modules/contrib/token/src/Controller/TokenTreeController.php b/web/modules/contrib/token/src/Controller/TokenTreeController.php
new file mode 100644
index 000000000..f233ab234
--- /dev/null
+++ b/web/modules/contrib/token/src/Controller/TokenTreeController.php
@@ -0,0 +1,56 @@
+<?php
+
+namespace Drupal\token\Controller;
+
+use Drupal\Component\Serialization\Json;
+use Drupal\Core\Controller\ControllerBase;
+use Drupal\token\TreeBuilderInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\HttpFoundation\Request;
+
+/**
+ * Returns tree responses for tokens.
+ */
+class TokenTreeController extends ControllerBase {
+
+  /**
+   * @var \Drupal\token\TreeBuilderInterface
+   */
+  protected $treeBuilder;
+
+  public function __construct(TreeBuilderInterface $tree_builder) {
+    $this->treeBuilder = $tree_builder;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('token.tree_builder')
+    );
+  }
+
+  /**
+   * Page callback to output a token tree as an empty page.
+   */
+  function outputTree(Request $request) {
+    $options = $request->query->has('options') ? Json::decode($request->query->get('options')) : [];
+
+    // The option token_types may only be an array OR 'all'. If it is not set,
+    // we assume that only global token types are requested.
+    $token_types = !empty($options['token_types']) ? $options['token_types'] : [];
+    if ($token_types == 'all') {
+      $build = $this->treeBuilder->buildAllRenderable($options);
+    }
+    else {
+      $build = $this->treeBuilder->buildRenderable($token_types, $options);
+    }
+
+    $build['#cache']['contexts'][] = 'url.query_args:options';
+    $build['#title'] = $this->t('Available tokens');
+
+    return $build;
+  }
+
+}