From 410d2b7dee90bdbeb4653fd188bda1d47e512938 Mon Sep 17 00:00:00 2001
From: Marcel Marnitz <marcelmarnitz@googlemail.com>
Date: Sat, 1 Dec 2018 21:40:55 +0100
Subject: [PATCH] Fixes Symfony 4.2 deprecation warning about
 TreeBuilder::_construct() calling without a parameter

---
 DependencyInjection/Configuration.php | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index a4dc9e67..9ea9e115 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -9,8 +9,14 @@ class Configuration implements ConfigurationInterface
 {
     public function getConfigTreeBuilder()
     {
-        $treeBuilder = new TreeBuilder();
-        $rootNode = $treeBuilder->root('scheb_two_factor');
+        $treeBuilder = new TreeBuilder('scheb_two_factor');
+
+        if (method_exists($treeBuilder, 'getRootNode')) {
+            $rootNode = $treeBuilder->getRootNode();
+        } else {
+            // BC layer for symfony/config 4.1 and older
+            $rootNode = $treeBuilder->root('scheb_two_factor');
+        }
 
         $rootNode
             ->children()