[plt-scheme] Adding arrows to my language

I do that by learn the code in "collects\drscheme\syncheck.ss".

Chongkai

David Van Horn wrote:
> I have a simple module based language and an accompanying analysis 
> that relates program points.  I'd like to draw arrows in the style of 
> lexical and tail call arrows based on the results of the analysis.
>
> Is there a succinct example of this sort of thing that I could use as 
> a starting point?
>
> Thanks,
> David
>
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