/PHP/TreeBuilder::getRootNode()" before creating the root node is not supported, migrate to the new constructor signature instead.

TreeBuilder::getRootNode()" before creating the root node is not supported, migrate to the new constructor signature instead.

$treeBuilder = new TreeBuilder('bundle_id');
$rootNode = method_exists(TreeBuilder::class, 'getRootNode') ? $treeBuilder->getRootNode() : $treeBuilder->root('bundle_id');

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