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  1. or download this
    package p1;
    
    ...
    }
    
    1;
    
  2. or download this
    package p2;
    
    ...
    }
    
    1;
    
  3. or download this
    use p2;
    
    ...
    say $obj->get_var1() . "\n";
    say $obj->set_var1('changed') . "\n";
    say $obj->get_var1() . "\n"
    
  4. or download this
    var-p1
    changed
    changed