anchor.diff:    }
   
     IVector<String> get FileTypeFilter {
  -    final retValuePtr = calloc<COMObject>();
  +    final retValuePtr = allocator<COMObject>();
   
       final hr = ptr.ref.lpVtbl.value
           .elementAt(14)
  
positive.code: /// {@category Interface}
  /// {@category winrt}
  class IFileOpenPicker extends IInspectable {
    // vtable begins at 6, is 11 entries long.
    IFileOpenPicker(Pointer<COMObject> ptr) : super(ptr);
  
    int get ViewMode {
      final retValuePtr = calloc<Int32>();
  
negative.code: 
      if (FAILED(hr)) throw WindowsException(hr);
  
      return IVector(retValuePtr, allocator: allocator);
    }
  
    Pointer<COMObject> PickSingleFileAsync() {
  