Issue #3309814 by LOBsTerr: Call to undefined method...

Issue #3309814 by LOBsTerr: Call to undefined method Drupal\ggroup\Graph\SqlGroupGraphStorage::loadMultiple()

src/GroupHierarchyManager.php

@@ -34,6 +34,13 @@ class GroupHierarchyManager implements GroupHierarchyManagerInterface {
    */
   protected $membershipLoader;
 
+  /**
+   * The group storage.
+   *
+   * @var \Drupal\group\Entity\Storage\GroupStorage;
+   */
+  protected $groupStorage;
+
   /**
    * Constructs a new GroupHierarchyManager.
    *
@@ -48,6 +55,7 @@ class GroupHierarchyManager implements GroupHierarchyManagerInterface {
     $this->groupGraphStorage = $group_graph_storage;
     $this->entityTypeManager = $entity_type_manager;
     $this->membershipLoader = $membership_loader;
+    $this->groupStorage = $entity_type_manager->getStorage('group');
   }
 
   /**
@@ -111,7 +119,7 @@ class GroupHierarchyManager implements GroupHierarchyManagerInterface {
    */
   public function getGroupSubgroups($group_id) {
     $subgroup_ids = $this->getGroupSubgroupIds($group_id);
-    return $this->groupGraphStorage->loadMultiple($subgroup_ids);
+    return $this->groupStorage->loadMultiple($subgroup_ids);
   }
 
   /**
@@ -126,7 +134,7 @@ class GroupHierarchyManager implements GroupHierarchyManagerInterface {
    */
   public function getGroupSupergroups($group_id) {
     $subgroup_ids = $this->getGroupSupergroupIds($group_id);
-    return $this->groupGraphStorage->loadMultiple($subgroup_ids);
+    return $this->groupStorage->loadMultiple($subgroup_ids);
   }
 
   /**