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From: tmoran@bix.com (Tom Moran)
Subject: Re: Ada OO Mechanism
Date: 1999/05/28
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> M : Machine'Class := Get(container-name);
We use that in Claw. For instance
DIB : Claw.Bitmaps.Root_DIBitmap_Type'Class
   := Claw.Bitmaps.IO.Read("xxx.bmp");
so DIB can be a VGA_DIBitmap_Type or a Mono_DIBitmap_Type or whatever.
Then writing, or putting it on the clipboard, or whatever, dispatches
on the particular kind.