Backend
constructor(bypassCacheOnRequestHeaders: List<BackendBucketCdnPolicyBypassCacheOnRequestHeaderResponse>, cacheKeyPolicy: BackendBucketCdnPolicyCacheKeyPolicyResponse, cacheMode: String, clientTtl: Int, defaultTtl: Int, maxTtl: Int, negativeCaching: Boolean, negativeCachingPolicy: List<BackendBucketCdnPolicyNegativeCachingPolicyResponse>, requestCoalescing: Boolean, serveWhileStale: Int, signedUrlCacheMaxAgeSec: String, signedUrlKeyNames: List<String>)