Recall constructor
      
      Recall({ 
    
    
- String? mid,
Implementation
factory Recall({
  $core.String? mid,
}) {
  final _result = create();
  if (mid != null) {
    _result.mid = mid;
  }
  return _result;
}factory Recall({
  $core.String? mid,
}) {
  final _result = create();
  if (mid != null) {
    _result.mid = mid;
  }
  return _result;
}