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Clean up temporary files extracted from the application at runtime. By
+ default, these files are cached in the temporary directory; this all
+ows the program to start up faster next time.

##
#  PAR::Packer example using Tk
...
$b2->pack(-side => 'right');
$mw->bind("<Control-q>" => sub { $b2->invoke });
$mw->MainLoop;