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diff --git a/web/modules/contrib/devel/src/Twig/Extension/Debug.php b/web/modules/contrib/devel/src/Twig/Extension/Debug.php
new file mode 100644
index 000000000..9922e6106
--- /dev/null
+++ b/web/modules/contrib/devel/src/Twig/Extension/Debug.php
@@ -0,0 +1,201 @@
+<?php
+
+namespace Drupal\devel\Twig\Extension;
+
+use Drupal\devel\DevelDumperManagerInterface;
+
+/**
+ * Provides the Devel debugging function within Twig templates.
+ *
+ * NOTE: This extension doesn't do anything unless twig_debug is enabled.
+ * The twig_debug setting is read from the Twig environment, not Drupal
+ * Settings, so a container rebuild is necessary when toggling twig_debug on
+ * and off.
+ */
+class Debug extends \Twig_Extension {
+
+  /**
+   * The devel dumper service.
+   *
+   * @var \Drupal\devel\DevelDumperManagerInterface
+   */
+  protected $dumper;
+
+  /**
+   * Constructs a Debug object.
+   *
+   * @param \Drupal\devel\DevelDumperManagerInterface $dumper
+   *   The devel dumper service.
+   */
+  public function __construct(DevelDumperManagerInterface $dumper) {
+    $this->dumper = $dumper;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getName() {
+    return 'devel_debug';
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFunctions() {
+    $functions = [];
+
+    foreach (['devel_dump', 'kpr'] as $function) {
+      $functions[] = new \Twig_SimpleFunction($function, [$this, 'dump'], [
+        'is_safe' => ['html'],
+        'needs_environment' => TRUE,
+        'needs_context' => TRUE,
+        'is_variadic' => TRUE,
+      ]);
+    }
+
+    foreach (['devel_message', 'dpm', 'dsm'] as $function) {
+      $functions[] = new \Twig_SimpleFunction($function, [$this, 'message'], [
+        'is_safe' => ['html'],
+        'needs_environment' => TRUE,
+        'needs_context' => TRUE,
+        'is_variadic' => TRUE,
+      ]);
+    }
+
+    foreach (['devel_breakpoint'] as $function) {
+      $functions[] = new \Twig_SimpleFunction($function, [$this, 'breakpoint'], [
+        'needs_environment' => TRUE,
+        'needs_context' => TRUE,
+        'is_variadic' => TRUE,
+      ]);
+    }
+
+    return $functions;
+  }
+
+  /**
+   * Provides debug function to Twig templates.
+   *
+   * Handles 0, 1, or multiple arguments.
+   *
+   * @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.
+   *
+   * @see \Drupal\devel\DevelDumperManager::dump()
+   */
+  public function dump(\Twig_Environment $env, array $context, array $args = []) {
+    if (!$env->isDebug()) {
+      return;
+    }
+
+    ob_start();
+
+    // No arguments passed, display full Twig context.
+    if (empty($args)) {
+      $context_variables = $this->getContextVariables($context);
+      $this->dumper->dump($context_variables, 'Twig context');
+    }
+    else {
+      foreach ($args as $variable) {
+        $this->dumper->dump($variable);
+      }
+    }
+
+    return ob_get_clean();
+  }
+
+  /**
+   * Provides debug function to Twig templates.
+   *
+   * Handles 0, 1, or multiple arguments.
+   *
+   * @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 void
+   *
+   * @see \Drupal\devel\DevelDumperManager::message()
+   */
+  public function message(\Twig_Environment $env, array $context, array $args = []) {
+    if (!$env->isDebug()) {
+      return;
+    }
+
+    // No arguments passed, display full Twig context.
+    if (empty($args)) {
+      $context_variables = $this->getContextVariables($context);
+      $this->dumper->message($context_variables, 'Twig context');
+    }
+    else {
+      foreach ($args as $variable) {
+        $this->dumper->message($variable);
+      }
+    }
+
+  }
+
+  /**
+   * Provides XDebug integration for Twig templates.
+   *
+   * To use this features simply put the following statement in the template
+   * of interest:
+   *
+   * @code
+   * {{ devel_breakpoint() }}
+   * @endcode
+   *
+   * When the template is evaluated is made a call to a dedicated method in
+   * devel twig debug extension in which is used xdebug_break(), that emits a
+   * breakpoint to the debug client (the debugger break on the specific line as
+   * if a normal file/line breakpoint was set on this line).
+   * In this way you'll be able to inspect any variables available in the
+   * template (environment, context, specific variables etc..) in your IDE.
+   *
+   * @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.
+   */
+  public function breakpoint(\Twig_Environment $env, array $context, array $args = []) {
+    if (!$env->isDebug()) {
+      return;
+    }
+
+    if (function_exists('xdebug_break')) {
+      xdebug_break();
+    }
+  }
+
+  /**
+   * Filters the Twig context variable.
+   *
+   * @param array $context
+   *  The Twig context.
+   *
+   * @return array
+   *   An array Twig context variables.
+   */
+  protected function getContextVariables(array $context) {
+    $context_variables = [];
+    foreach ($context as $key => $value) {
+      if (!$value instanceof \Twig_Template) {
+        $context_variables[$key] = $value;
+      }
+    }
+    return $context_variables;
+  }
+
+}