IDataTransferManagerInterop with void** parameter

Actual behavior

When I try to use IDataTransferManagerInterop the generated code uses a void** to return the requested DataTransferManager. I believe more comfortable code can and should be generated e.g. using an out DataTansferManager parameter.

Generated code:

[Guid("3A3DCD6C-3EAB-43DC-BCDE-45671CE800C8"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown), ComImport]
public interface IDataTransferManagerInterop
{
    unsafe void GetForWindow(HWND appWindow, global::System.Guid*riid, [Optional] void **dataTransferManager);
    void ShowShareUIForWindow(HWND appWindow);
}

as well as

    public static partial class FriendlyOverloadExtensions
    {
        public static unsafe void GetForWindow(this IDataTransferManagerInterop @this, HWND appWindow, in global::System.Guid riid, void **dataTransferManager)
        {
            // ...
        }
    }

Expected behavior

The generated code works. The unsafe nature of a void** pointer and the complexity to arrive at a working implementation lead me to file this issue.

Repro steps

1. NativeMethods.txt content:

IDataTransferManagerInterop

2. NativeMethods.json content (if present):

{
  "$schema": "https://aka.ms/CsWin32.schema.json",
  "public": true
}

3. Any of your own code that should be shared?

using WinRT;
// riid of DataTransferManager, not IDataTransferManagerInterop 
var guid = Guid.Parse("a5caee9b-8708-49d1-8d36-67d25a8da00c"); 
var iop = DataTransferManager.As<IDataTransferManagerInterop>();
var transferManager = IntPtr.Zero;
iop.GetForWindow(PInvoke.GetActiveWindow(), guid, (void**)&transferManager);
var realManager = DataTransferManager.FromAbi(transferManager);

Context

• CsWin32 version: 0.1.445-beta
• Target Framework: .net 5.0