 )     {         struct set_traits: public cc::split_list::traits         {             typedef cc::lazy_list_tag ordered_list;             typedef hash_int hash;             typedef cds::atomicity::item_counter item_counter;             typedef cds::backoff::yield back_off;             typedef cds::opt::v::sequential_consistent memory_model;              struct ordered_list_traits: public cc::lazy_list::traits             {                 typedef cmp compare;                 typedef cds::backoff::pause back_off;             