How to dispatch a class function for an object accessed by handle?

[Steven Schveighoffer]

On 3/6/20 8:55 AM, Steven Schveighoffer wrote:
> Instantiate!(f.opDispatch!fname, Bitmap)("path/to/wallpaper.png")

I realized, this doesn't work. Because f.opDispatch is a `this` call, 
but is not called that way in this case.

Adam's way doesn't work either, because the call doesn't use the alias, 
but just instantiates opDispatch with the new name!

I think the only solution might be the mixin.

-Steve