resume method

Future<bool> resume()

Resume file downloading, if file exists downloading will continue from file size will return false if downloading is in progress, finished or cancelled

Implementation

Future<bool> resume() async {
  if (_doneOrCancelled || _downloading) return false;
  _addEvent(TaskEvent(
      state: TaskState.downloading,
      bytesReceived: _bytesReceived,
      totalBytes: _totalBytes));
  _download().then((value) => _subscription = value);
  // _subscription = await  _download();
  return true;
}