From 714b1919d520ec3d207a9e1441cda4375a9713be Mon Sep 17 00:00:00 2001
From: Fran Moreno <franmomu@gmail.com>
Date: Mon, 17 Dec 2018 13:23:21 +0100
Subject: [PATCH] Fix deprecation for symfony/config 4.2+

---
 src/DependencyInjection/Configuration.php | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/DependencyInjection/Configuration.php b/src/DependencyInjection/Configuration.php
index 8098829..1882794 100644
--- a/src/DependencyInjection/Configuration.php
+++ b/src/DependencyInjection/Configuration.php
@@ -31,8 +31,12 @@ class Configuration implements ConfigurationInterface
      */
     public function getConfigTreeBuilder()
     {
-        $treeBuilder = new TreeBuilder();
-        $treeBuilder->root('sonata_datagrid', 'array');
+        $treeBuilder = new TreeBuilder('sonata_datagrid');
+
+        // Keep compatibility with symfony/config < 4.2
+        if (!\method_exists($treeBuilder, 'getRootNode')) {
+            $treeBuilder->root('sonata_datagrid');
+        }
 
         return $treeBuilder;
     }