code: public function getConfigTreeBuilder()
      {
          $nodeBuilder = new NodeBuilder();
          $nodeBuilder->setNodeClass('dynamicArray', DynamicArrayNodeDefinition::class);
          $treeBuilder = new TreeBuilder();
  
          $rootNode = $treeBuilder->root('prooph', 'dynamicArray', $nodeBuilder);
  
          // our factories handles validation and we are flexible with keys
          // Please take a look at the docs or specific prooph component factory for the configuration options
          $rootNode->ignoreExtraKeys(false);
  
          return $treeBuilder;
      }
docs: {@inheritdoc}