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diff --git a/web/modules/contrib/libraries/src/ExternalLibrary/LibraryManager.php b/web/modules/contrib/libraries/src/ExternalLibrary/LibraryManager.php
new file mode 100644
index 000000000..17a62236e
--- /dev/null
+++ b/web/modules/contrib/libraries/src/ExternalLibrary/LibraryManager.php
@@ -0,0 +1,120 @@
+<?php
+
+namespace Drupal\libraries\ExternalLibrary;
+
+use Drupal\Component\Plugin\Factory\FactoryInterface;
+use Drupal\libraries\ExternalLibrary\Exception\LibraryTypeNotFoundException;
+use Drupal\libraries\ExternalLibrary\Type\LibraryCreationListenerInterface;
+use Drupal\libraries\ExternalLibrary\Type\LibraryLoadingListenerInterface;
+use Drupal\libraries\ExternalLibrary\Definition\DefinitionDiscoveryInterface;
+
+/**
+ * Provides a manager for external libraries.
+ *
+ * @todo Dispatch events at various points in the library lifecycle.
+ * @todo Automatically load PHP file libraries that are required by modules or
+ *   themes.
+ */
+class LibraryManager implements LibraryManagerInterface {
+
+  /**
+   * The library definition discovery.
+   *
+   * @var \Drupal\libraries\ExternalLibrary\Definition\DefinitionDiscoveryInterface
+   */
+  protected $definitionDiscovery;
+
+  /**
+   * The library type factory.
+   *
+   * @var \Drupal\Component\Plugin\Factory\FactoryInterface
+   */
+  protected $libraryTypeFactory;
+
+  /**
+   * Constructs an external library manager.
+   *
+   * @param \Drupal\libraries\ExternalLibrary\Definition\DefinitionDiscoveryInterface $definition_disovery
+   *   The library registry.
+   * @param \Drupal\Component\Plugin\Factory\FactoryInterface $library_type_factory
+   *   The library type factory.
+   */
+  public function __construct(
+    DefinitionDiscoveryInterface $definition_disovery,
+    FactoryInterface $library_type_factory
+  ) {
+    $this->definitionDiscovery = $definition_disovery;
+    $this->libraryTypeFactory = $library_type_factory;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getLibrary($id) {
+    $definition = $this->definitionDiscovery->getDefinition($id);
+    return $this->getLibraryFromDefinition($id, $definition);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getRequiredLibraryIds() {
+    $library_ids = [];
+    foreach (['module', 'theme'] as $type) {
+      foreach (system_get_info($type) as $info) {
+        if (isset($info['library_dependencies'])) {
+          $library_ids = array_merge($library_ids, $info['library_dependencies']);
+        }
+      }
+    }
+    return array_unique($library_ids);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function load($id) {
+    $definition = $this->definitionDiscovery->getDefinition($id);
+    $library_type = $this->getLibraryType($id, $definition);
+    // @todo Throw an exception instead of silently failing.
+    if ($library_type instanceof LibraryLoadingListenerInterface) {
+      $library_type->onLibraryLoad($this->getLibraryFromDefinition($id, $definition));
+    }
+  }
+
+  /**
+   * @param $id
+   * @param $definition
+   * @return mixed
+   */
+  protected function getLibraryFromDefinition($id, $definition) {
+    $library_type = $this->getLibraryType($id, $definition);
+
+    // @todo Make this alter-able.
+    $class = $library_type->getLibraryClass();
+
+    // @todo Make sure that the library class implements the correct interface.
+    $library = $class::create($id, $definition, $library_type);
+
+    if ($library_type instanceof LibraryCreationListenerInterface) {
+      $library_type->onLibraryCreate($library);
+      return $library;
+    }
+    return $library;
+  }
+
+  /**
+   * @param string $id
+   * @param array $definition
+   *
+   * @return \Drupal\libraries\ExternalLibrary\Type\LibraryTypeInterface
+   */
+  protected function getLibraryType($id, $definition) {
+    // @todo Validate that the type is a string.
+    if (!isset($definition['type'])) {
+      throw new LibraryTypeNotFoundException($id);
+    }
+    return $this->libraryTypeFactory->createInstance($definition['type']);
+  }
+
+}