From 162c8dd1cc75691fbd9a78a6d2fcb2e3fa5689d1 Mon Sep 17 00:00:00 2001
From: Martin Hujer <mhujer@gmail.com>
Date: Fri, 30 Nov 2018 16:48:49 +0100
Subject: [PATCH] Fix deprecation for symfony/config 4.2

Fixed the same way as in https://github.com/doctrine/DoctrineBundle/pull/853
---
 DependencyInjection/Configuration.php | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index 5338402b..ee6fc2f6 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -29,8 +29,14 @@ class Configuration implements ConfigurationInterface
      */
     public function getConfigTreeBuilder()
     {
-        $treeBuilder = new TreeBuilder();
-        $rootNode = $treeBuilder->root('sensio_framework_extra', 'array');
+        $treeBuilder = new TreeBuilder('sensio_framework_extra');
+
+	    if (method_exists($treeBuilder, 'getRootNode')) {
+		    $rootNode = $treeBuilder->getRootNode();
+	    } else {
+		    // BC layer for symfony/config 4.1 and older
+		    $rootNode = $treeBuilder->root('sensio_framework_extra');
+	    }
 
         $rootNode
             ->children()