BackendServiceCdnPolicy constructor
      
      BackendServiceCdnPolicy({ 
    
    
- List<BackendServiceCdnPolicyBypassCacheOnRequestHeader> ? bypassCacheOnRequestHeaders,
- CacheKeyPolicy? cacheKeyPolicy,
- String? cacheMode,
- int? clientTtl,
- int? defaultTtl,
- int? maxTtl,
- bool? negativeCaching,
- List<BackendServiceCdnPolicyNegativeCachingPolicy> ? negativeCachingPolicy,
- bool? requestCoalescing,
- int? serveWhileStale,
- String? signedUrlCacheMaxAgeSec,
- List<String> ? signedUrlKeyNames,
Implementation
BackendServiceCdnPolicy({
  this.bypassCacheOnRequestHeaders,
  this.cacheKeyPolicy,
  this.cacheMode,
  this.clientTtl,
  this.defaultTtl,
  this.maxTtl,
  this.negativeCaching,
  this.negativeCachingPolicy,
  this.requestCoalescing,
  this.serveWhileStale,
  this.signedUrlCacheMaxAgeSec,
  this.signedUrlKeyNames,
});