t", nil];      return self; }  #pragma mark - AFURLResponseSerialization  - (id)responseObjectForResponse:(NSURLResponse *)response                            data:(NSData *)data                           error:(NSError *__autoreleasing *)error {     if (![self validateResponse:(NSHTTPURLResponse *)response data:data error:error]) {         if (!error || AFErrorOrUnderlyingErrorHasCodeInDomain(*error, NSURLErrorCannotDecodeContentData, AFURLResponseSerializationErrorDomain)) {             return nil;         }     }      