string handle(HttpCache $cache

interface ResponseCacheStrategyInterface ResponseCacheStrategyInterface implementations know how

add(Response $response)

class Esi implements

string handle(HttpCache $cache

ResponseCacheStrategyInterface createCacheStrategy() Returns a new cache strategy instance. Return Value ResponseCacheStrategyInterface A ResponseCacheStrategyInterface instance

bool hasSurrogateCapability(Request $request)

invalidate(Request $request)

bool unlock(Request $request)

bool|string lock(Request $request)