From 941ff661c7f78cd0da0097482acf2f5dde4bcbb5 Mon Sep 17 00:00:00 2001
From: Trent Steel <tsteel@vivogroup.com.au>
Date: Tue, 29 Jun 2021 12:27:37 +1000
Subject: [PATCH] BC

---
 DependencyInjection/Configuration.php | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index 018b280a..1d13d645 100755
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -16,9 +16,11 @@ class Configuration implements ConfigurationInterface
      * {@inheritdoc}
      */
     public function getConfigTreeBuilder()
-    {
-        $treeBuilder = new TreeBuilder();
-        $rootNode = $treeBuilder->root('trsteel_ckeditor');
+    {        
+        $treeBuilder = new TreeBuilder('trsteel_ckeditor');
+        $rootNode = method_exists(TreeBuilder::class, 'getRootNode')
+            ? $treeBuilder->getRootNode()
+            : $treeBuilder->root('trsteel_ckeditor');
 
         $rootNode
             ->children()