From b149a0bdc586b6e4734663217e47056002f49199 Mon Sep 17 00:00:00 2001
From: CodeWithDennis <23448484+CodeWithDennis@users.noreply.github.com>
Date: Fri, 2 Feb 2024 15:32:54 +0100
Subject: [PATCH] Revert "Make `customKey()` nullable"

---
 src/SelectTree.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/SelectTree.php b/src/SelectTree.php
index a9828ce..5418f54 100644
--- a/src/SelectTree.php
+++ b/src/SelectTree.php
@@ -37,7 +37,7 @@ class SelectTree extends Field implements HasAffixActions
 
     protected bool $independent = true;
 
-    protected ?string $customKey = null;
+    protected string $customKey = null;
 
     protected string $titleAttribute;