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#!/usr/bin/perl -w
use strict;
...
    ### an error code, but not in THIS case of Perl. "1" is the
    ### right return value here! Any way trust me, you need a 
    ### 1 return value at the end of a .pm module.

#!/usr/bin/perl -w
use strict;
...
TEST_GIZMO::test1; #this is "fully qualified name", a way to
                   #invoke test1 even if that name wasn't 
                   #explicitly exported.