#!/usr/bin/perl

use X;   # X uses Y secondarily

# this works
func_in_X();     # imported into our namespace
Y::func_in_Y();  # fully qualified 
X::func_in_Y();  # fully qualified via namespace X,
                 #   into which func_in_Y() has been exported

# this doesn't work
func_in_Y();     # not imported into our namespace