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  1. or download this
    use strict;
use Data::Dumper;
...
   $r = $r->{shift(@_)} while $r && @_;
   return $r;
}
  2. or download this
    relative_path at test2.pl line 20.
/an_absolute_path at test2.pl line 20.
relative_path at test2.pl line 20.