View difference between Paste ID: 64vfqQYN and DUEVnukx

 <?
 
 namespace Bundle\PaymentGatewayBundle\DependencyInjection;
 
 use Symfony\Component\Config\Definition\Builder\TreeBuilder;
 use Symfony\Component\Config\Definition\ConfigurationInterface;
 
 class Configuration implements ConfigurationInterface
 {
 
     public function getConfigTreeBuilder()
     {
         $treeBuilder = new TreeBuilder();
         $rootNode = $treeBuilder->root('payment_gateway');
 
         $rootNode
             ->children()
                 ->arrayNode('config')
                     ->children()
                         ->arrayNode('default')
                             ->children()
                                 ->scalarNode('apiLoginId')->isRequired()->cannotBeEmpty()->end()
                                 ->scalarNode('transactionKey')->isRequired()->cannotBeEmpty()->end()
                                 ->scalarNode('postUrl')->isRequired()->cannotBeEmpty()->end()
                             ->end()
                         ->end()
                     ->end()
                 ->end()
              ->end();
 
 
         return $treeBuilder;
     }
 
 }