HttpCache (Component\HttpKernel)

Symfony\Component\HttpKernel\HttpCache

Esi	Esi implements the ESI capabilities to Request and Response instances.
EsiResponseCacheStrategy	EsiResponseCacheStrategy knows how to compute the Response cache HTTP header based on the different ESI response cache headers.
HttpCache	Cache provides HTTP caching.
Store	Store implements all the logic for storing cache metadata (Request and Response headers).