protected function setupTree(ArrayNodeDefinition $rootNode)
{
$rootNode->children()->arrayNode('mapping')->addDefaultsIfNotSet()->children()->append($this->addMappingNode('shipping_range', 'Elcodi\\Plugin\\CustomShippingBundle\\Entity\\ShippingRange', '@ElcodiCustomShippingBundle/Resources/config/doctrine/ShippingRange.orm.yml', 'default', true))->append($this->addMappingNode('carrier', 'Elcodi\\Plugin\\CustomShippingBundle\\Entity\\Carrier', '@ElcodiCustomShippingBundle/Resources/config/doctrine/Carrier.orm.yml', 'default', true))->end()->end()->end();
}