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Avoid deprecation warning when using symfony/config >= 4.2 #98

merged 1 commit into from Jan 3, 2019
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Just for now

@@ -14,9 +14,11 @@ class Configuration implements ConfigurationInterface
public function getConfigTreeBuilder()
$treeBuilder = new TreeBuilder();
$treeBuilder = new TreeBuilder('knp_markdown');
// BC layer for symfony/config < 4.2
$rootNode = method_exists($treeBuilder, 'getRootNode') ? $treeBuilder->getRootNode() : $treeBuilder->root('knp_markdown');

$treeBuilder->root('knp_markdown', 'array')
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