our %EXPORT= ( # all configuration done in this one hash
                foo => [ v1.0, 'foo_old', v2.0, 'foo_new' ],
                bar => 'bar_internal',
                baz => 'baz',
                fobble => \&figure_it_out, # parameter list is (caller, version, symbol, param-list tail)
                bobble => \\&_boble_internal,
                $x => '$x',
                $y => \\$y,  # a hard reference rather than a name
                :tagname => [ 'foo', 'bar' ],
                :DEFAULT => [ v1.0, ':_old_imports', v2.3, ':_new_imports' ],
                :_old_imports => [ 'foo', 'bar', 'baz', 'fobble' ],
                :_new_imports => [ 'fobble' ],
                .option => "value",
                .default_VERSION => v1.5,
                .warnings => 1
        );