From 052c5ad3ed7e96e76f017e6d017b00fc3f362f3e Mon Sep 17 00:00:00 2001
From: magicHatOfTYPO3 <mw@f7.de>
Date: Thu, 12 Dec 2024 11:14:04 +0100
Subject: [PATCH] [BUGFIX] Return empty ObjectStorage instead of null

---
 Classes/Domain/Model/Usergroup.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Classes/Domain/Model/Usergroup.php b/Classes/Domain/Model/Usergroup.php
index 7b30eb7..a9ce872 100644
--- a/Classes/Domain/Model/Usergroup.php
+++ b/Classes/Domain/Model/Usergroup.php
@@ -17,7 +17,7 @@ class Usergroup extends AbstractEntity
     /**
      * @var ObjectStorage<Usergroup>
      */
-    protected ObjectStorage $subgroup;
+    protected ?ObjectStorage $subgroup = null;
 
     public function __construct(string $title = '')
     {
@@ -67,6 +67,9 @@ public function removeSubgroup(Usergroup $subgroup): self
 
     public function getSubgroup(): ObjectStorage
     {
+        if ($this->subgroup === null) {
+            $this->subgroup = new ObjectStorage();
+        }
         return $this->subgroup;
     }