Expanded class hierarchy of PageCache in Drupal 8
- class \Drupal\page_cache\StackMiddleware\PageCache implements \Symfony\Component\HttpKernel\HttpKernelInterface
- class \Drupal\big_pipe_sessionless\StackMiddleware\BigPipeSessionlessPageCache
- class \Drupal\tome_static\StackMiddleware\ResettablePageCache
- class \Drupal\visually_impaired_module\StackMiddleware\MyCache