*/
public function set(SectionStorageInterface $section_storage);
+ /**
+ * Checks for the existence of a tempstore version of a section storage.
+ *
+ * @param \Drupal\layout_builder\SectionStorageInterface $section_storage
+ * The section storage to check for in tempstore.
+ *
+ * @return bool
+ * TRUE if there is a tempstore version of this section storage.
+ */
+ public function has(SectionStorageInterface $section_storage);
+
/**
* Removes the tempstore version of a section storage.
*