Backend
fun BackendServiceCdnPolicyResponse(bypassCacheOnRequestHeaders: List<BackendServiceCdnPolicyBypassCacheOnRequestHeaderResponse>, cacheKeyPolicy: CacheKeyPolicyResponse, cacheMode: String, clientTtl: Int, defaultTtl: Int, maxTtl: Int, negativeCaching: Boolean, negativeCachingPolicy: List<BackendServiceCdnPolicyNegativeCachingPolicyResponse>, requestCoalescing: Boolean, serveWhileStale: Int, signedUrlCacheMaxAgeSec: String, signedUrlKeyNames: List<String>)