id ext = [transaction ext:kFTSExtensionName];
[ext enumerateKeysMatching:[NSString stringWithFormat:@"*%@*", [searchQuery lowercaseString]]
                                                                   usingBlock:^(NSString *collection, NSString *key, BOOL *stop) {
                                                                       [result addObject:[transaction objectForKey:key inCollection:collection]];
                                                                   }];