private function setupDeprecatedConfiguration(NodeBuilder $nodeBuilder)
    {
        $nodeBuilder
            ->arrayNode('output_custom_tags')
                ->setDeprecated('DEPRECATED. Configure custom tags using custom_tags node')
                ->info('Custom XSL stylesheets to use for RichText transformation to HTML5. Useful for "custom tags".')
                ->example(
                    [
                        'path' => '%kernel.root_dir%/../src/Acme/TestBundle/Resources/myTag.xsl',
                        'priority' => 10,
                    ]
                )
                ->prototype('array')
                    ->children()
                        ->scalarNode('path')
                            ->info('Path of the XSL stylesheet to load.')
                            ->isRequired()
                        ->end()
                        ->integerNode('priority')
                            ->info('Priority in the loading order. A high value will have higher precedence in overriding XSL templates.')
                            ->defaultValue(0)
                        ->end()
                    ->end()
                ->end()
            ->end()
            ->arrayNode('edit_custom_tags')
                ->setDeprecated('DEPRECATED. Configure custom tags using custom_tags node')
                ->info('Custom XSL stylesheets to use for RichText transformation to HTML5. Useful for "custom tags".')
                ->example(
                    [
                        'path' => '%kernel.root_dir%/../src/Acme/TestBundle/Resources/myTag.xsl',
                        'priority' => 10,
                    ]
                )
                ->prototype('array')
                    ->children()
                        ->scalarNode('path')
                            ->info('Path of the XSL stylesheet to load.')
                            ->isRequired()
                        ->end()
                        ->integerNode('priority')
                            ->info('Priority in the loading order. A high value will have higher precedence in overriding XSL templates.')
                            ->defaultValue(0)
                        ->end()
                    ->end()
                ->end()
            ->end()
            ->arrayNode('input_custom_tags')
                ->setDeprecated('DEPRECATED. Configure custom tags using custom_tags node')
                ->info('Custom XSL stylesheets to use for RichText transformation to HTML5. Useful for "custom tags".')
                ->example(
                    [
                        'path' => '%kernel.root_dir%/../src/Acme/TestBundle/Resources/myTag.xsl',
                        'priority' => 10,
                    ]
                )
                ->prototype('array')
                    ->children()
                        ->scalarNode('path')
                            ->info('Path of the XSL stylesheet to load.')
                            ->isRequired()
                        ->end()
                        ->integerNode('priority')
                            ->info('Priority in the loading order. A high value will have higher precedence in overriding XSL templates.')
                            ->defaultValue(0)
                        ->end()
                    ->end()
                ->end()
            ->end()
            ->arrayNode('tags')
                ->setDeprecated('DEPRECATED. Configure custom tags using custom_tags node')
                ->info('RichText template tags configuration.')
                ->useAttributeAsKey('key')
                ->normalizeKeys(false)
                ->prototype('array')
                    ->info(
                        "Name of RichText template tag.\n" .
                        "'default' and 'default_inline' tag names are reserved for fallback."
                    )
                    ->example('math_equation')
                    ->children()
                        ->append(
                            $this->getTemplateNodeDefinition(
                                'Template used for rendering RichText template tag.',
                                'MyBundle:FieldType/RichText/tag:math_equation.html.twig'
                            )
                        )
                        ->variableNode('config')
                            ->info('Tag configuration, arbitrary configuration is allowed here.')
                        ->end()
                    ->end()
                ->end()
            ->end()
        ;
    }