code: public function getConfigTreeBuilder()
      {
          $treeBuilder = new TreeBuilder();
          $rootNode = $treeBuilder->root('dumbsmart_repositories');
  
          $rootNode
              ->children()
                  ->append($this->getRepositoriesConfiguration())
                  ->append($this->getAutoconfigureConfiguration())
                  ->append($this->getAliasesConfiguration())
                  ->append($this->getEntitiesConfiguration())
              ->end()
          ;
  
          return $treeBuilder;
      }
docs: {@inheritdoc}