scalarPrototype example

class ConfigurationWithArrayNodeRequiringOneElement implements ConfigurationInterface
{
    public function getConfigTreeBuilder(): TreeBuilder
    {
        $treeBuilder = new TreeBuilder('env_extension');
        $treeBuilder->getRootNode()
            ->children()
                ->arrayNode('nodes')
                    ->isRequired()
                    ->requiresAtLeastOneElement()
                    ->scalarPrototype()->end()
                ->end()
            ->end();

        return $treeBuilder;
    }
}

class EnvExtension extends Extension
{
    private ConfigurationInterface $configuration;
    private array $config;

    

        $treeBuilder = new TreeBuilder('storefront');

        $rootNode = $treeBuilder->getRootNode();

        $rootNode
            ->children()
                ->arrayNode('reverse_proxy')
                    ->children()
                        ->booleanNode('enabled')->end()
                        ->booleanNode('use_varnish_xkey')->defaultFalse()->end()
                        ->arrayNode('hosts')->performNoDeepMerging()->scalarPrototype()->end()->end()
                        ->integerNode('max_parallel_invalidations')->defaultValue(2)->end()
                        ->scalarNode('redis_url')->end()
                        ->scalarNode('ban_method')->defaultValue('BAN')->end()
                        ->arrayNode('ban_headers')->performNoDeepMerging()->defaultValue([])->scalarPrototype()->end()->end()
                        ->arrayNode('purge_all')
                            ->children()
                                ->scalarNode('ban_method')->defaultValue('BAN')->end()
                                ->arrayNode('ban_headers')->performNoDeepMerging()->defaultValue([])->scalarPrototype()->end()->end()
                                ->arrayNode('urls')->performNoDeepMerging()->defaultValue(['/'])->scalarPrototype()->end()->end()
                            ->end()
                        ->end()
                        

->end()
                ->booleanNode('cache_enabled')
                    ->defaultTrue()
                ->end()
                ->arrayNode('sets')
                    ->useAttributeAsKey('name')
                    ->arrayPrototype()
                        ->children()
                            ->scalarNode('name')->end()
                            ->arrayNode('tags')
                                ->defaultValue([])
                                ->scalarPrototype()->end()
                            ->end()
                            ->arrayNode('attributes')
                                ->defaultValue([])
                                ->scalarPrototype()->end()
                            ->end()
                            ->arrayNode('custom_attributes')
                                ->defaultValue([])
                                ->arrayPrototype()
                                    ->children()
                                        ->arrayNode('tags')
                                            ->defaultValue([])
                                            

->arrayNode('ssl')
                    ->children()
                        ->scalarNode('cert_path')->end()
                        ->scalarNode('cert_password')->end()
                        ->scalarNode('cert_key_path')->end()
                        ->scalarNode('cert_key_password')->end()
                        ->booleanNode('verify_server_cert')->defaultValue(true)->end()
                    ->end()
                ->end()
                ->arrayNode('index_settings')->variablePrototype()->end()->end()
                ->arrayNode('analysis')->performNoDeepMerging()->variablePrototype()->end()->end()
                ->arrayNode('language_analyzer_mapping')->defaultValue([])->scalarPrototype()->end()->end()
                ->arrayNode('dynamic_templates')->performNoDeepMerging()->variablePrototype()->end()->end()
                ->arrayNode('product')
                    ->children()
                        ->arrayNode('custom_fields_mapping')
                            ->variablePrototype()->end()
                        ->end()
                    ->end()
                ->end()
                ->arrayNode('search')
                    ->children()
                        ->scalarNode('timeout')->end()
                        

    public function testPrototypeVariable()
    {
        $node = new ArrayNodeDefinition('root');
        $this->assertEquals($node->prototype('variable'), $node->variablePrototype());
    }

    public function testPrototypeScalar()
    {
        $node = new ArrayNodeDefinition('root');
        $this->assertEquals($node->prototype('scalar'), $node->scalarPrototype());
    }

    public function testPrototypeBoolean()
    {
        $node = new ArrayNodeDefinition('root');
        $this->assertEquals($node->prototype('boolean'), $node->booleanPrototype());
    }

    public function testPrototypeInteger()
    {
        $node = new ArrayNodeDefinition('root');
        

->canBeEnabled()
                    ->fixXmlConfig('private_header')
                    ->children()
                        ->booleanNode('debug')->defaultValue('%kernel.debug%')->end()
                        ->enumNode('trace_level')
                            ->values(['none', 'short', 'full'])
                        ->end()
                        ->scalarNode('trace_header')->end()
                        ->integerNode('default_ttl')->end()
                        ->arrayNode('private_headers')
                            ->performNoDeepMerging()
                            ->scalarPrototype()->end()
                        ->end()
                        ->arrayNode('skip_response_headers')
                            ->performNoDeepMerging()
                            ->scalarPrototype()->end()
                        ->end()
                        ->booleanNode('allow_reload')->end()
                        ->booleanNode('allow_revalidate')->end()
                        ->integerNode('stale_while_revalidate')->end()
                        ->integerNode('stale_if_error')->end()
                        ->booleanNode('terminate_on_cache_hit')->end()
                    ->end()
                

->scalarNode('realm')->defaultNull()->end()
            ->arrayNode('token_extractors')
                ->fixXmlConfig('token_extractors')
                ->beforeNormalization()
                    ->ifString()
                    ->then(fn ($v) => [$v])
                ->end()
                ->cannotBeEmpty()
                ->defaultValue([
                    'security.access_token_extractor.header',
                ])
                ->scalarPrototype()->end()
            ->end()
        ;

        $tokenHandlerNodeBuilder = $builder
            ->arrayNode('token_handler')
                ->example([
                    'id' => 'App\Security\CustomTokenHandler',
                ])

                ->beforeNormalization()
                    ->ifString()