Config/Definition/ConfigDefinition.php
public function getConfigTreeBuilder()
    {
        $treeBuilder = new TreeBuilder();
        $rootNode = $treeBuilder->root('gauges');
        $rootNode
            ->useAttributeAsKey('path')
            ->prototype('array')
            ->children()
                ->scalarNode('class')
                    ->isRequired()
                    ->cannotBeEmpty()
                ->end()
                ->variableNode('arguments')->end()
            ->end();

        return $treeBuilder;
    }
public function getConfigTreeBuilder()
    {
        $treeBuilder = new TreeBuilder();
        $rootNode = $treeBuilder->root('gauges');
        $rootNode
            ->useAttributeAsKey('path')
            ->prototype('array')
            ->children()
                ->scalarNode('class')
                    ->isRequired()
                    ->cannotBeEmpty()
                ->end()
                ->variableNode('arguments')->end()
            ->end();

        return $treeBuilder;
    }
public function getConfigTreeBuilder ( ) { $ treeBuilder = new TreeBuilder ( ) ; $ rootNode = $ treeBuilder -> root ( 'gauges' ) ; $ rootNode -> useAttributeAsKey ( 'path' ) -> prototype ( 'array' ) -> children ( ) -> scalarNode ( 'class' ) -> isRequired ( ) -> cannotBeEmpty ( ) -> end ( ) -> variableNode ( 'arguments' ) -> end ( ) -> end ( ) ; return $ treeBuilder ; }
Provides configuration mapping

@return TreeBuilder
Provides configuration mapping