public function getConfigTreeBuilder()
{
$treeBuilder = new TreeBuilder();
$rootNode = $treeBuilder->root('guzzle_stereo');
$rootNode->children()->scalarNode('cache_directory')->end()->booleanNode('marker_header')->defaultValue(false)->end()->arrayNode('tapes')->normalizeKeys(false)->prototype('array')->children()->arrayNode('filters')->normalizeKeys(false)->prototype('scalar')->end()->end()->end()->end()->end()->arrayNode('core_filters')->prototype('scalar')->end()->end()->arrayNode('custom_filters')->prototype('scalar')->end()->end()->end();
return $treeBuilder;
}