Note that the first instance of trim could have been imported from a module, so there's in fact only one explicit declaration in the code.

#!/usr/bin/perl
use warnings;
use strict;

{
    package My;
    use Exporter qw{ import };
    our @EXPORT = qw { trim };
    sub trim { 1 }
}

'My'->import;  # Same as "use My;" if My was declared in My.pm
sub trim ($) { 2 }
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($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,
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