my $self = {
         nest => [
                    [
                     [
                      1,
                      2,
                      3
                     ],
                     [
                      4,
                      5,
                      6
                     ],
                    ],
                 ],
         more => [
                  3,
                  2,
                  1
                 ]
};

##</code><code>##

my $c1 = new CLASS;
my $c2 = $c1;