You can't get there from here. Only Perl can parse Perl. So until you've loaded the module, no one can know all the subs and variables that module will provide.

I suppose if you really wanted to you could grep the module source for:

    /^ \s* sub \s+ (\w+) \s* [({] /x

But that would miss a lot.

    -- Chip Salzenberg, Free-Floating Agent of Chaos