multi_index_container< balance_object, indexed_by< ordered_unique< tag< by_id >, member< object, object_id_type, &object::id > >, ordered_non_unique< tag< by_owner >, composite_key< balance_object, member< balance_object, address, &balance_object::owner >, const_mem_fun< balance_object, asset_id_type, &balance_object::asset_type > > > > > balance_multi_index_type