Наследование: implements Symfony\Component\Config\Definition\ConfigurationInterface
 /**
  * Tests the object instantiation.
  */
 public function testInstantiation()
 {
     $this->assertInstanceOf('Contao\\CoreBundle\\DependencyInjection\\Configuration', $this->configuration);
     $this->assertInstanceOf('Symfony\\Component\\Config\\Definition\\Builder\\TreeBuilder', $this->configuration->getConfigTreeBuilder());
 }