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  1. or download this
    package Your::Package;
    
  2. or download this
    package My::Module;
    
    use Exporter qw(import);
    @EXPORT_OK = qw(sub names here);
    
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    package My::Package;
    
    ...
            print $lines;
        }
    }
    
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    use strict;
    use warnings;
    ...
    open my $file, '<', shift;
    
    print_lines($file);