21         $rootNode = $treeBuilder->root('wiki_tag');

    21         $rootNode = $treeBuilder->root('wiki_tag');

    22         

    22         

    23         $rootNode

    23         $rootNode

    24             ->children()

    24             ->children()

    25                 ->scalarNode('route_for_documents_by_tag')->defaultNull()->end()

    25                 ->scalarNode('route_for_documents_by_tag')->defaultNull()->end()

    26                 ->scalarNode('document_class')->isRequired()->end()

    27                 ->scalarNode('document_class')->isRequired()->end()

    27                 ->scalarNode('document_id_column')->defaultValue('id')->end()

    28                 ->scalarNode('document_id_column')->defaultValue('id')->end()

    28             ->end()

    29             ->end()

    29             ->fixXmlConfig('field')

    30             ->fixXmlConfig('field')

    30             ->children()

    31             ->children()