Expanded class hierarchy of KernelEvent

class \Symfony\Component\EventDispatcher\Event
- class \Drupal\Core\Config\ConfigEvent
- class \Drupal\Core\Config\ConfigImporterEvent
- class \Drupal\Core\Routing\RouteBuildEvent
- class \Drupal\rdf\MapTypesFromInputEvent
- class \Guzzle\Common\Event implements \Guzzle\Common\ArrayAccess, \Guzzle\Common\IteratorAggregate
- class \Symfony\Component\EventDispatcher\GenericEvent implements \Symfony\Component\EventDispatcher\ArrayAccess, \Symfony\Component\EventDispatcher\IteratorAggregate
- class \Symfony\Component\HttpKernel\Event\KernelEvent
  - class \Symfony\Component\HttpKernel\Event\FilterControllerEvent
  - class \Symfony\Component\HttpKernel\Event\FilterResponseEvent
  - class \Symfony\Component\HttpKernel\Event\GetResponseEvent
- class \Symfony\Component\HttpKernel\Event\PostResponseEvent