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diff --git a/web/modules/contrib/devel/kint/src/Twig/KintExtension.php b/web/modules/contrib/devel/kint/src/Twig/KintExtension.php
new file mode 100644
index 000000000..4f177f9bf
--- /dev/null
+++ b/web/modules/contrib/devel/kint/src/Twig/KintExtension.php
@@ -0,0 +1,154 @@
+<?php
+
+namespace Drupal\kint\Twig;
+
+/**
+ * Provides the Kint debugging function within Twig templates.
+ */
+class KintExtension extends \Twig_Extension {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getName() {
+    return 'kint';
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFunctions() {
+    return array(
+      new \Twig_SimpleFunction('kint', array($this, 'kint'), array(
+        'is_safe' => array('html'),
+        'needs_environment' => TRUE,
+        'needs_context' => TRUE,
+        'is_variadic' => TRUE,
+      )),
+    );
+  }
+
+  /**
+   * Provides Kint function to Twig templates.
+   *
+   * Handles 0, 1, or multiple arguments.
+   *
+   * Code derived from https://github.com/barelon/CgKintBundle.
+   *
+   * @param \Twig_Environment $env
+   *   The twig environment instance.
+   * @param array $context
+   *   An array of parameters passed to the template.
+   * @param array $args
+   *   An array of parameters passed the function.
+   *
+   * @return string
+   *   String representation of the input variables.
+   */
+  public function kint(\Twig_Environment $env, array $context, array $args = []) {
+    // Don't do anything unless twig_debug is enabled. This reads from the Twig
+    // environment, not Drupal Settings, so a container rebuild is necessary
+    // when toggling twig_debug on and off. We can consider injecting Settings.
+    if (!$env->isDebug()) {
+      return;
+    }
+    kint_require();
+    // Don't display where Kint was called from.
+    // @todo Can we add information about which template Kint was called from?
+    \Kint::$displayCalledFrom = FALSE;
+
+    // No arguments passed to kint(), display full Twig context.
+    if (empty($args)) {
+      $kint_variable = array();
+      foreach ($context as $key => $value) {
+        if (!$value instanceof \Twig_Template) {
+          $kint_variable[$key] = $value;
+        }
+      }
+
+      $result = @\Kint::dump($kint_variable);
+      $output = str_replace('$kint_variable', 'Twig context', $result);
+    }
+    else {
+      // Try to get the names of variables from the Twig template.
+      $parameters = $this->getTwigFunctionParameters();
+
+      // If there is only one argument, pass to Kint without too much hassle.
+      if (count($args) == 1) {
+        $kint_variable = reset($args);
+        $variable_name = reset($parameters);
+        $result = @\Kint::dump($kint_variable);
+        // Replace $kint_variable with the name of the variable in the Twig
+        // template.
+        $output = str_replace('$kint_variable', $variable_name, $result);
+      }
+      else {
+        $kint_args = [];
+        // Build an array of variable to pass to Kint.
+        // @todo Can we just call_user_func_array while still retaining the
+        //   variable names?
+        foreach ($args as $index => $arg) {
+          // Prepend a unique index to allow debugging the same variable more
+          // than once in the same Kint dump.
+          $name = !empty($parameters[$index]) ? $parameters[$index] : $index;
+          $kint_args['_index_' . $index . '_' . $name] = $arg;
+        }
+
+        $result = @\Kint::dump($kint_args);
+        // Display a comma separated list of the variables contained in this group.
+        $output = str_replace('$kint_args', implode(', ', $parameters), $result);
+        // Remove unique indexes from output.
+        $output = preg_replace('/_index_([0-9]+)_/', '', $output);
+      }
+    }
+
+    return $output;
+  }
+
+  /**
+   * Gets the twig function parameters for the current invocation.
+   *
+   * @return array
+   *   The detected twig function parameters.
+   */
+  protected function getTwigFunctionParameters() {
+    $callee = NULL;
+    $template = NULL;
+
+    $backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS | DEBUG_BACKTRACE_PROVIDE_OBJECT);
+
+    foreach ($backtrace as $index => $trace) {
+      if (isset($trace['object']) && $trace['object'] instanceof \Twig_Template && 'Twig_Template' !== get_class($trace['object'])) {
+        $template = $trace['object'];
+        $callee = $backtrace[$index - 1];
+        break;
+      }
+    }
+
+    $parameters = [];
+
+    /** @var \Twig_Template $template */
+    if (NULL !== $template && NULL !== $callee) {
+      $line_number = $callee['line'];
+      $debug_infos = $template->getDebugInfo();
+
+      if (isset($debug_infos[$line_number])) {
+        $source_line = $debug_infos[$line_number];
+        $source_file_name = $template->getTemplateName();
+
+        if (is_readable($source_file_name)) {
+          $source = file($source_file_name, FILE_IGNORE_NEW_LINES);
+          $line = $source[$source_line - 1];
+
+          preg_match('/kint\((.+)\)/', $line, $matches);
+          if (isset($matches[1])) {
+            $parameters = array_map('trim', explode(',', $matches[1]));
+          }
+        }
+      }
+    }
+
+    return $parameters;
+  }
+
+}