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structure of DispatcherDefault and just add this new API I need. (I don't
intend to change anything in DispatcherDefault - just change to using this
new dispatcher wherever the old one was being used). This new Dispatcher
would also reuse/replicate the assembly code for DispatcherDefault, since
I don't think I will need to change any functionality represented in those
functions. The only thing that would be different is that this Dispatcher
would communicate with another type of Scheduler (which again would be
cloned from the current scheduler code, plus the added functionality). So
to me, it seems like creating this new type of Dispatcher should not
be as big a deal, other than figuring out make-file type stuff.
(I'm not too worried about code-duplication concerns right now - I just
want to see whether this works).