From 1b4835eb4d78c8aa1e46049a3d874ba76bf099ad Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Adam=20W=C3=B3js?= <adam@wojs.pl>
Date: Sun, 22 Sep 2019 13:10:16 +0200
Subject: [PATCH] Fixed deprecated TreeBuilder::root method call in SF 4

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

diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index 413033d..3683c20 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -14,8 +14,14 @@ class Configuration implements ConfigurationInterface
      */
     public function getConfigTreeBuilder()
     {
-        $treeBuilder = new TreeBuilder();
-        $rootNode = $treeBuilder->root('gregwar_captcha');
+        $treeBuilder = new TreeBuilder('gregwar_captcha');
+
+        if (method_exists($treeBuilder, 'getRootNode')) {
+            $rootNode = $treeBuilder->getRootNode();
+        } else {
+            // BC for symfony/config <= 4.1
+            $rootNode = $treeBuilder->root('gregwar_captcha');
+        }
 
         $rootNode
             ->addDefaultsIfNotSet()