private function getFieldsConfiguration(NodeBuilder $rootNode)
{
$rootNode->arrayNode('fields_defaults')->addDefaultsIfNotSet()->children()->arrayNode('translations')->addDefaultsIfNotSet()->children()->scalarNode('id')->defaultValue('public.id')->end()->scalarNode('title')->defaultValue('public.title')->end()->scalarNode('name')->defaultValue('public.name')->end()->scalarNode('created')->defaultValue('public.created')->end()->scalarNode('changed')->defaultValue('public.changed')->end()->end()->end()->arrayNode('widths')->addDefaultsIfNotSet()->children()->scalarNode('id')->defaultValue('50px')->end()->end()->end()->end()->end();
}