{
note("\tduplicates");
my ($dup_elems, $elems) = ($obj->elems(1), $obj->elems());
isnt($dup_elems, $elems, 'references: dup_elems != elems');
is_deeply($dup_elems, $elems, 'conten
lems == elems');
my ($dup_elem_ids, $elem_ids) = ($obj->elem_ids(1), $obj->elem_ids);
isnt($dup_elem_ids, $elem_ids, 'references: dup_elem_ids != elem_ids');
is_deeply($dup_elem_ids,
elem_ids');
my ($dup_tab_elems, $tab_elems) = ($obj->tab_elems(1), $obj->tab_elems);
isnt($dup_tab_elems, $tab_elems, 'references: dup_tab_elems != tab_elems');
is_deeply($dup_tab_el