DependencyInjection/Configuration.php
private function addIndexesSection(ArrayNodeDefinition $node)
    {
        $node
            ->children()
                ->arrayNode('indexes')
                ->isRequired()
                ->requiresAtLeastOneElement()
                    ->useAttributeAsKey('key')
                    ->prototype('scalar')->end()
                ->end()
            ->end();
    }
private function addIndexesSection(ArrayNodeDefinition $node)
    {
        $node
            ->children()
                ->arrayNode('indexes')
                ->isRequired()
                ->requiresAtLeastOneElement()
                    ->useAttributeAsKey('key')
                    ->prototype('scalar')->end()
                ->end()
            ->end();
    }
private function addIndexesSection ( ArrayNodeDefinition $ node ) { $ node -> children ( ) -> arrayNode ( 'indexes' ) -> isRequired ( ) -> requiresAtLeastOneElement ( ) -> useAttributeAsKey ( 'key' ) -> prototype ( 'scalar' ) -> end ( ) -> end ( ) -> end ( ) ; }
Set indexes parameters

@param ArrayNodeDefinition $node
Set indexes parameters