Builder constructs a nested HttpKernelInterface decorator tree. It models it as a stack of middlewares.
HttpKernelInterface
Shortcut function for handling HttpKernel front-controller boilerplate.
Provides a request session for subsequent middlewares. Based on the Silex SessionServiceProvider.
Provides the ability to map paths to specific HttpKernelInterface applications and dispatches accordingly.
A lazy proxy for HttpKernelInterface, allows an app to be loaded on demand when combined with URL Map.