upload method
      
Future<String> 
upload(
    
    
- String arg_transferKey,
- String arg_bucket,
- String arg_cosPath,
- String? arg_region,
- String? arg_filePath,
- Uint8List? arg_byteArr,
- String? arg_uploadId,
- String? arg_stroageClass,
- int? arg_trafficLimit,
- String? arg_callbackParam,
- Map<String?, String?> ? arg_customHeaders,
- List<String?> ? arg_noSignHeaders,
- int? arg_resultCallbackKey,
- int? arg_stateCallbackKey,
- int? arg_progressCallbackKey,
- int? arg_initMultipleUploadCallbackKey,
- SessionQCloudCredentials? arg_sessionCredentials,
Implementation
Future<String> upload(String arg_transferKey, String arg_bucket, String arg_cosPath, String? arg_region, String? arg_filePath, Uint8List? arg_byteArr, String? arg_uploadId, String? arg_stroageClass, int? arg_trafficLimit, String? arg_callbackParam, Map<String?, String?>? arg_customHeaders, List<String?>? arg_noSignHeaders, int? arg_resultCallbackKey, int? arg_stateCallbackKey, int? arg_progressCallbackKey, int? arg_initMultipleUploadCallbackKey, SessionQCloudCredentials? arg_sessionCredentials) async {
  final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
      'dev.flutter.pigeon.CosTransferApi.upload', codec,
      binaryMessenger: _binaryMessenger);
  final List<Object?>? replyList =
      await channel.send(<Object?>[arg_transferKey, arg_bucket, arg_cosPath, arg_region, arg_filePath, arg_byteArr, arg_uploadId, arg_stroageClass, arg_trafficLimit, arg_callbackParam, arg_customHeaders, arg_noSignHeaders, arg_resultCallbackKey, arg_stateCallbackKey, arg_progressCallbackKey, arg_initMultipleUploadCallbackKey, arg_sessionCredentials]) as List<Object?>?;
  if (replyList == null) {
    throw PlatformException(
      code: 'channel-error',
      message: 'Unable to establish connection on channel.',
    );
  } else if (replyList.length > 1) {
    throw PlatformException(
      code: replyList[0]! as String,
      message: replyList[1] as String?,
      details: replyList[2],
    );
  } else if (replyList[0] == null) {
    throw PlatformException(
      code: 'null-error',
      message: 'Host platform returned null value for non-null return value.',
    );
  } else {
    return (replyList[0] as String?)!;
  }
}