Sonata\PaymentBundle\DependencyInjection\Configuration::addModelSection PHP Method

    private function addModelSection(ArrayNodeDefinition $node)
    {
        $node->children()->arrayNode('class')->addDefaultsIfNotSet()->children()->scalarNode('order')->defaultValue('Application\\Sonata\\OrderBundle\\Entity\\Order')->end()->scalarNode('transaction')->defaultValue('Application\\Sonata\\PaymentBundle\\Entity\\Transaction')->end()->end()->end()->end();
    }