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diff --git a/web/core/modules/field/src/FieldStorageConfigStorage.php b/web/core/modules/field/src/FieldStorageConfigStorage.php
new file mode 100644
index 000000000..7a793f682
--- /dev/null
+++ b/web/core/modules/field/src/FieldStorageConfigStorage.php
@@ -0,0 +1,174 @@
+<?php
+
+namespace Drupal\field;
+
+use Drupal\Component\Uuid\UuidInterface;
+use Drupal\Core\Config\Entity\ConfigEntityStorage;
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Entity\EntityManagerInterface;
+use Drupal\Core\Entity\EntityTypeInterface;
+use Drupal\Core\Field\FieldTypePluginManagerInterface;
+use Drupal\Core\Language\LanguageManagerInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Drupal\Core\Config\ConfigFactoryInterface;
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\State\StateInterface;
+
+/**
+ * Controller class for "field storage" configuration entities.
+ */
+class FieldStorageConfigStorage extends ConfigEntityStorage {
+
+  /**
+   * The module handler.
+   *
+   * @var \Drupal\Core\Extension\ModuleHandlerInterface
+   */
+  protected $moduleHandler;
+
+  /**
+   * The entity manager.
+   *
+   * @var \Drupal\Core\Entity\EntityManagerInterface
+   */
+  protected $entityManager;
+
+  /**
+   * The state keyvalue collection.
+   *
+   * @var \Drupal\Core\State\StateInterface
+   */
+  protected $state;
+
+  /**
+   * The field type plugin manager.
+   *
+   * @var \Drupal\Core\Field\FieldTypePluginManagerInterface
+   */
+  protected $fieldTypeManager;
+
+  /**
+   * Constructs a FieldStorageConfigStorage object.
+   *
+   * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
+   *   The entity type definition.
+   * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
+   *   The config factory service.
+   * @param \Drupal\Component\Uuid\UuidInterface $uuid_service
+   *   The UUID service.
+   * @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
+   *   The language manager.
+   * @param \Drupal\Core\Entity\EntityManagerInterface $entity_manager
+   *   The entity manager.
+   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
+   *   The module handler.
+   * @param \Drupal\Core\State\StateInterface $state
+   *   The state key value store.
+   * @param \Drupal\Component\Plugin\PluginManagerInterface\FieldTypePluginManagerInterface $field_type_manager
+   *   The field type plugin manager.
+   */
+  public function __construct(EntityTypeInterface $entity_type, ConfigFactoryInterface $config_factory, UuidInterface $uuid_service, LanguageManagerInterface $language_manager, EntityManagerInterface $entity_manager, ModuleHandlerInterface $module_handler, StateInterface $state, FieldTypePluginManagerInterface $field_type_manager) {
+    parent::__construct($entity_type, $config_factory, $uuid_service, $language_manager);
+    $this->entityManager = $entity_manager;
+    $this->moduleHandler = $module_handler;
+    $this->state = $state;
+    $this->fieldTypeManager = $field_type_manager;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function createInstance(ContainerInterface $container, EntityTypeInterface $entity_type) {
+    return new static(
+      $entity_type,
+      $container->get('config.factory'),
+      $container->get('uuid'),
+      $container->get('language_manager'),
+      $container->get('entity.manager'),
+      $container->get('module_handler'),
+      $container->get('state'),
+      $container->get('plugin.manager.field.field_type')
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function loadByProperties(array $conditions = []) {
+    // Include deleted fields if specified in the $conditions parameters.
+    $include_deleted = isset($conditions['include_deleted']) ? $conditions['include_deleted'] : FALSE;
+    unset($conditions['include_deleted']);
+
+    /** @var \Drupal\field\FieldStorageConfigInterface[] $storages */
+    $storages = [];
+
+    // Get field storages living in configuration. If we are explicitly looking
+    // for deleted storages only, this can be skipped, because they will be
+    // retrieved from state below.
+    if (empty($conditions['deleted'])) {
+      if (isset($conditions['entity_type']) && isset($conditions['field_name'])) {
+        // Optimize for the most frequent case where we do have a specific ID.
+        $id = $conditions['entity_type'] . $conditions['field_name'];
+        $storages = $this->loadMultiple([$id]);
+      }
+      else {
+        // No specific ID, we need to examine all existing storages.
+        $storages = $this->loadMultiple();
+      }
+    }
+
+    // Merge deleted field storages (living in state) if needed.
+    if ($include_deleted || !empty($conditions['deleted'])) {
+      $deleted_storages = $this->state->get('field.storage.deleted') ?: [];
+      foreach ($deleted_storages as $id => $config) {
+        $storages[$id] = $this->create($config);
+      }
+    }
+
+    // Collect matching fields.
+    $matches = [];
+    foreach ($storages as $field) {
+      foreach ($conditions as $key => $value) {
+        // Extract the actual value against which the condition is checked.
+        $checked_value = $field->get($key);
+        // Skip to the next field as soon as one condition does not match.
+        if ($checked_value != $value) {
+          continue 2;
+        }
+      }
+
+      // When returning deleted fields, key the results by UUID since they can
+      // include several fields with the same ID.
+      $key = $include_deleted ? $field->uuid() : $field->id();
+      $matches[$key] = $field;
+    }
+
+    return $matches;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function mapFromStorageRecords(array $records) {
+    foreach ($records as $id => &$record) {
+      $class = $this->fieldTypeManager->getPluginClass($record['type']);
+      if (empty($class)) {
+        $config_id = $this->getPrefix() . $id;
+        throw new \RuntimeException("Unable to determine class for field type '{$record['type']}' found in the '$config_id' configuration");
+      }
+      $record['settings'] = $class::storageSettingsFromConfigData($record['settings']);
+    }
+    return parent::mapFromStorageRecords($records);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function mapToStorageRecord(EntityInterface $entity) {
+    $record = parent::mapToStorageRecord($entity);
+    $class = $this->fieldTypeManager->getPluginClass($record['type']);
+    $record['settings'] = $class::storageSettingsToConfigData($record['settings']);
+    return $record;
+  }
+
+}