public function addSemanticConfig(NodeBuilder $nodeBuilder)
{
$nodeBuilder->arrayNode('languages')->cannotBeEmpty()->info('Available languages, in order of precedence')->example(array('fre-FR', 'eng-GB'))->prototype('scalar')->end()->end()->arrayNode('translation_siteaccesses')->info('List of "translation siteaccesses" which can be used by language switcher.')->example(array('french_siteaccess', 'english_siteaccess'))->prototype('scalar')->end()->end();
}