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diff --git a/web/core/modules/layout_builder/src/LayoutTempstoreRepository.php b/web/core/modules/layout_builder/src/LayoutTempstoreRepository.php
new file mode 100644
index 000000000..39725afc7
--- /dev/null
+++ b/web/core/modules/layout_builder/src/LayoutTempstoreRepository.php
@@ -0,0 +1,78 @@
+<?php
+
+namespace Drupal\layout_builder;
+
+use Drupal\Core\TempStore\SharedTempStoreFactory;
+
+/**
+ * Provides a mechanism for loading layouts from tempstore.
+ *
+ * @internal
+ */
+class LayoutTempstoreRepository implements LayoutTempstoreRepositoryInterface {
+
+  /**
+   * The shared tempstore factory.
+   *
+   * @var \Drupal\Core\TempStore\SharedTempStoreFactory
+   */
+  protected $tempStoreFactory;
+
+  /**
+   * LayoutTempstoreRepository constructor.
+   *
+   * @param \Drupal\Core\TempStore\SharedTempStoreFactory $temp_store_factory
+   *   The shared tempstore factory.
+   */
+  public function __construct(SharedTempStoreFactory $temp_store_factory) {
+    $this->tempStoreFactory = $temp_store_factory;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function get(SectionStorageInterface $section_storage) {
+    $id = $section_storage->getStorageId();
+    $tempstore = $this->getTempstore($section_storage)->get($id);
+    if (!empty($tempstore['section_storage'])) {
+      $storage_type = $section_storage->getStorageType();
+      $section_storage = $tempstore['section_storage'];
+
+      if (!($section_storage instanceof SectionStorageInterface)) {
+        throw new \UnexpectedValueException(sprintf('The entry with storage type "%s" and ID "%s" is invalid', $storage_type, $id));
+      }
+    }
+    return $section_storage;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function set(SectionStorageInterface $section_storage) {
+    $id = $section_storage->getStorageId();
+    $this->getTempstore($section_storage)->set($id, ['section_storage' => $section_storage]);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function delete(SectionStorageInterface $section_storage) {
+    $id = $section_storage->getStorageId();
+    $this->getTempstore($section_storage)->delete($id);
+  }
+
+  /**
+   * Gets the shared tempstore.
+   *
+   * @param \Drupal\layout_builder\SectionStorageInterface $section_storage
+   *   The section storage.
+   *
+   * @return \Drupal\Core\TempStore\SharedTempStore
+   *   The tempstore.
+   */
+  protected function getTempstore(SectionStorageInterface $section_storage) {
+    $collection = 'layout_builder.section_storage.' . $section_storage->getStorageType();
+    return $this->tempStoreFactory->get($collection);
+  }
+
+}