code: public function process(ContainerBuilder $container)
      {
          $container->getDefinition('translator.default')->addMethodCall('addResource', array('contentful_strings_' . $this->domain, null, 'en', $this->domain));
          $container->getDefinition('translator.default')->addMethodCall('addResource', array('contentful_strings_' . $this->domain, null, 'de', $this->domain));
          $container->getDefinition('translator.default')->addMethodCall('addResource', array('contentful_strings_' . $this->domain, null, 'ky', $this->domain));
      }
docs: {@inheritdoc}