is_deeply($list, { $group => [ qw(1 1 n) ] }, 'LIST works');
is_deeply([$n->group($group)], [ qw(0 1 1), $group ], 'GROUP works');
is_deeply($n->listgroup($group), [1], 'listgroup OK');
is_deeply($list, { $group => [ qw(1 1 n) ] }, 'LIST works');
is_deeply([$n->group($group)], [ qw(0 1 1), $group ], 'GROUP works');
is_deeply($n->listgroup($group), [1], 'listgroup OK');