public function getConfigTreeBuilder()
{
$treeBuilder = new TreeBuilder();
$rootNode = $treeBuilder->root('sylius_locale');
$rootNode->children()->scalarNode('driver')->defaultValue(SyliusResourceBundle::DRIVER_DOCTRINE_ORM)->end()->scalarNode('locale')->defaultValue('en')->cannotBeEmpty()->end()->end();
$this->addResourcesSection($rootNode);
return $treeBuilder;
}