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messages -> CacheStorageEngineConnection {
    Reference(uint64_t cacheIdentifier)
    Dereference(uint64_t cacheIdentifier)

    Open(struct WebCore::ClientOrigin origin, String cacheName) -> (WebCore::DOMCacheEngine::CacheIdentifierOrError result) Async
    Remove(uint64_t cacheIdentifier) -> (WebCore::DOMCacheEngine::CacheIdentifierOrError result) Async
    Caches(struct WebCore::ClientOrigin origin, uint64_t updateCounter) -> (WebCore::DOMCacheEngine::CacheInfosOrError result) Async

    RetrieveRecords(uint64_t cacheIdentifier, URL url) -> (WebCore::DOMCacheEngine::RecordsOrError result) Async
    DeleteMatchingRecords(uint64_t cacheIdentifier, WebCore::ResourceRequest request, struct WebCore::CacheQueryOptions options) -> (WebCore::DOMCacheEngine::RecordIdentifiersOrError result) Async
    PutRecords(uint64_t cacheIdentifier, Vector<WebCore::DOMCacheEngine::Record> record) -> (WebCore::DOMCacheEngine::RecordIdentifiersOrError result) Async

    ClearMemoryRepresentation(struct WebCore::ClientOrigin origin) -> (Optional<WebCore::DOMCacheEngine::Error> error) Async
    EngineRepresentation() -> (String representation) Async
}