original_string: protected function defineCss(NodeBuilder $saNode)
      {
          $saNode
              ->arrayNode('css')
                  ->children()
                      ->arrayNode('files')
                          ->prototype('scalar')->end()
                      ->end()
                  ->end()
              ->end();
      }
code: protected function defineCss(NodeBuilder $saNode)
      {
          $saNode
              ->arrayNode('css')
                  ->children()
                      ->arrayNode('files')
                          ->prototype('scalar')->end()
                      ->end()
                  ->end()
              ->end();
      }
code_tokens: protected function defineCss ( NodeBuilder $ saNode ) { $ saNode -> arrayNode ( 'css' ) -> children ( ) -> arrayNode ( 'files' ) -> prototype ( 'scalar' ) -> end ( ) -> end ( ) -> end ( ) -> end ( ) ; }
docstring: Defines the expected configuration for the CSS.
  
  @param $saNode \Symfony\Component\Config\Definition\Builder\NodeBuilder
docstring_tokens: Defines the expected configuration for the CSS .