public function getConfigTreeBuilder()
{
$treeBuilder = new TreeBuilder();
$rootNode = $treeBuilder->root('cocur_slugify');
$rootNode->children()->booleanNode('lowercase')->defaultTrue()->end()->scalarNode('separator')->defaultValue('-')->end()->scalarNode('regexp')->end()->arrayNode('rulesets')->prototype('scalar')->end()->end();
return $treeBuilder;
}