ArdentParameterBundle/DependencyInjection/ArdentParameterExtension.php

<?php

namespace Ardent\ParameterBundle\DependencyInjection;

use Symfony\Component\Config\FileLocator;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Extension\Extension;
use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;

class ArdentParameterExtension extends Extension
{
    public function load(array $configs, ContainerBuilder $container)
    {
        $loader = new YamlFileLoader(
            $container,
            new FileLocator(dirname(__DIR__).'/Resources/config')
        );
        $loader->load('services.yaml');

        $configuration = new Configuration();
        $config = $this->processConfiguration($configuration, $configs);

        $def = $container->findDefinition('ardent.parameter');
        $def->setArgument('$config', $config['parameters']);
    }
}