private function loadParameters(ContainerBuilder $container, array $config)
    {
        // Store config in parameters array to be passed into the DrupalContext.
        $drupal_parameters = array();
        foreach ($config as $key => $value) {
            $drupal_parameters[$key] = $value;
        }
        $container->setParameter('drupal.parameters', $drupal_parameters);

        $container->setParameter('drupal.region_map', $config['region_map']);
    }