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diff --git a/web/modules/contrib/bootstrap_layouts/src/BootstrapLayoutsPluginManager.php b/web/modules/contrib/bootstrap_layouts/src/BootstrapLayoutsPluginManager.php
new file mode 100644
index 000000000..c6041e54b
--- /dev/null
+++ b/web/modules/contrib/bootstrap_layouts/src/BootstrapLayoutsPluginManager.php
@@ -0,0 +1,117 @@
+<?php
+
+namespace Drupal\bootstrap_layouts;
+
+use Drupal\Core\Cache\CacheBackendInterface;
+use Drupal\Core\DependencyInjection\ContainerInjectionInterface;
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\Extension\ThemeHandlerInterface;
+use Drupal\Core\Plugin\DefaultPluginManager;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
+use Drupal\Core\Theme\ThemeManagerInterface;
+use Symfony\Component\DependencyInjection\ContainerAwareInterface;
+use Symfony\Component\DependencyInjection\ContainerAwareTrait;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+class BootstrapLayoutsPluginManager extends DefaultPluginManager implements ContainerInjectionInterface, ContainerAwareInterface {
+
+  use ContainerAwareTrait;
+  use StringTranslationTrait;
+
+  /**
+   * @var \Drupal\Core\Extension\ThemeHandlerInterface
+   */
+  protected $themeHandler;
+
+  /**
+   * @var \Drupal\Core\Theme\ThemeManagerInterface
+   */
+  protected $themeManager;
+
+  /**
+   * Base plugin manager for Bootstrap Layouts plugin managers.
+   *
+   * The "container.namespaces" service does not contain theme namespaces
+   * since themes are not registered in the container. To allow themes to be
+   * able to participate in these plugins, the normal "namespaces" provided
+   * must be appending with the missing autoloader prefixes of the themes.
+   *
+   * @param \Traversable $namespaces
+   *   An object that implements \Traversable which contains the root paths
+   *   keyed by the corresponding namespace to look for plugin implementations.
+   * @param \Drupal\Core\Cache\CacheBackendInterface $cache_backend
+   *   Cache backend instance to use.
+   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
+   *   The module handler to invoke the alter hook with.
+   * @param \Drupal\Core\Extension\ThemeHandlerInterface $theme_handler
+   *   The theme manager used to invoke the alter hook with.
+   * @param \Drupal\Core\Theme\ThemeManagerInterface $theme_manager
+   *   The theme manager used to invoke the alter hook with.
+   * @param string|null $plugin_interface
+   *   (optional) The interface each plugin should implement.
+   * @param string $plugin_definition_annotation_name
+   *   (optional) The name of the annotation that contains the plugin definition.
+   *   Defaults to 'Drupal\Component\Annotation\Plugin'.
+   */
+  public function __construct(\Traversable $namespaces, CacheBackendInterface $cache_backend, ModuleHandlerInterface $module_handler, ThemeHandlerInterface $theme_handler, ThemeManagerInterface $theme_manager, $plugin_interface = NULL, $plugin_definition_annotation_name = 'Drupal\Component\Annotation\Plugin') {
+    /** @var \Composer\Autoload\ClassLoader $class_loader */
+    $class_loader = \Drupal::service('class_loader');
+
+    /** @var \ArrayObject $namespaces */
+    $ns = $namespaces->getArrayCopy();
+
+    foreach ($class_loader->getPrefixesPsr4() as $prefix => $paths) {
+      // Remove trailing path separators.
+      $prefix = trim($prefix, '\\');
+
+      // Remove the DRUPAL_ROOT prefix.
+      $path = str_replace(\Drupal::root() . '/', '', reset($paths));
+
+      // Only add missing contrib theme namespaces.
+      if (preg_match('/^(core|vendor)/', $path) === 0 && !isset($namespaces[$prefix])) {
+        $ns[$prefix] = $path;
+      }
+    }
+
+    // Replace the namespaces data.
+    $namespaces->exchangeArray($ns);
+
+    // Construct the plugin manager now.
+    parent::__construct('Plugin/BootstrapLayouts', $namespaces, $module_handler, $plugin_interface, $plugin_definition_annotation_name);
+
+    // Set the theme handler and manager.
+    $this->themeHandler = $theme_handler;
+    $this->themeManager = $theme_manager;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('container.namespaces'),
+      $container->get('cache.discovery'),
+      $container->get('module_handler'),
+      $container->get('theme_handler'),
+      $container->get('theme.manager')
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function alterDefinitions(&$definitions) {
+    if ($this->alterHook) {
+      $this->moduleHandler->alter($this->alterHook, $definitions);
+      $this->themeManager->alter($this->alterHook, $definitions);
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function providerExists($provider) {
+    return $this->moduleHandler->moduleExists($provider) || $this->themeHandler->themeExists($provider);
+  }
+
+}