message: [PreheatedCache] add early exit check
diff: @@ -153,6 +153,12 @@ PreheatCache() {
  NSURL *preHeatedCacheDirectory = [[NSBundle mainBundle] URLForResource:ARGraphQLQueryCachePreheatedCacheDirname withExtension:nil];
  NSDate *preheatedCacheCreatedAt = PreheatedCacheCreatedAt(preHeatedCacheDirectory, &error);
  +
  + if (preheatedCacheCreatedAt == nil) {
  + DLog(@"[ARGraphQLQueryCache] Skip installing pre-heated cache");
  + return;
  + }
  +
  if (error == nil && CacheHasBeenPreheated(preheatedCacheCreatedAt)) {
  DLog(@"[ARGraphQLQueryCache] Cache has already been pre-heated before");
  return;
  