private function addAlloyEditorSection(NodeBuilder $ezRichTextNode)
    {
        return $ezRichTextNode
                ->arrayNode('alloy_editor')
                    ->children()
                        ->arrayNode('extra_plugins')
                            ->example(['plugin1', 'plugin2'])
                            ->prototype('scalar')->end()
                        ->end()
                        ->arrayNode('extra_buttons')
                            ->arrayPrototype()
                                ->example(['button1', 'button2'])
                                ->prototype('scalar')->end()
                            ->end()
                        ->end()
                    ->end()
                ->end()
            ;
    }