Region
constructor(cacheKeyPolicy: RegionBackendServiceCdnPolicyCacheKeyPolicy? = null, cacheMode: String? = null, clientTtl: Int? = null, defaultTtl: Int? = null, maxTtl: Int? = null, negativeCaching: Boolean? = null, negativeCachingPolicies: List<RegionBackendServiceCdnPolicyNegativeCachingPolicy>? = null, serveWhileStale: Int? = null, signedUrlCacheMaxAgeSec: Int? = null)